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2013 product line
            Grilles
          Diffusers
   External Louvres
          Dampers
Grille & diffuser range
Single deflection and fixed blade grilles
Series SD & FB
Single deflection grilles have a single bank of fully adjustable blades
for throw adjustment in one plane.

Fixed blade grilles have the blade pack fixed at either 0°, 15° or 45°.




                                                                               25mm flat (Opt)                          32mm bevelled (Std)
                                                                          A    Nominal + 30mm                   A         Nominal + 45mm
                                                                          B        46mm                         B             28mm
                                                                          C        90mm                         C             72mm
                                                                          D        25mm                         D             32mm




Double deflection grilles                                                                       Stock product
Series DD
                                                                              The following sizes are kept in stock for quick delivery.
Double deflection grilles add a second set of adjustable blades, set at               Satin anodised and RAL9010 available.
90° to the first set. This allows throw adjustment in both planes,
allowing greater throw adjustment than single deflection grilles.                 1502, 2002, 2502, 3002, 3502, 4002, 4502, 5002

                                                                                   200 x 150, 300 x 150, 300 x 200, 400 x 200




                                                                               25mm flat (Opt)                          32mm bevelled (Std)
                                                                          A    Nominal + 30mm                   A         Nominal + 45mm
                                                                          B        46mm                         B             46mm
                                                                          C        90mm                         C             90mm
                                                                          D        25mm                         D             32mm




       2               www.airtherm.co.uk
Egg crate grilles                                                                                       Stock product
Series ECG
                                                                                     The following sizes are kept in stock for quick delivery.
The industry standard extract grille, egg crate grilles have a free area            RAL9010 finish, with and without opposed blade dampers.
of around 90%, meaning they can handle large air volumes with
minimal pressure drops or noise generation.                                       1502, 2002, 2502, 3002, 3502, 4002, 4502, 5002, 5952 Overall face




                                                                                        30mm flat (Opt)                        37mm bevelled (Std)
                                                                             A          Nominal + 30mm                  A        Nominal + 45mm
                                                                             B              28mm                        B            28mm
                                                                             C              72mm                        C            70mm
                                                                             D              30mm                        D            37mm




Non vision grilles
Series NV
                                                                           NV1
Designed to block line of sight from all angles (NV4 from most), non
vision grilles are used where privacy must be maintained, like
bathrooms and doctors surgeries.




                                                                           NV2
                                                                           Door




                                                                           NV3
                                                                           Darkrooms




                                                                           NV4
                                                                           Surface
                                                                           mounted




                                                                                                    www.airtherm.co.uk                           3
Grille & diffuser range continued
Curved blade (eyelash) grilles
Series CB
Curved blade grilles have an unconventional appearance, and allow
throw adjustment thanks to the single bank of individually adjustable
blades.

1, 2, 3 and 4 way blow set ups available.




                                                                                  25mm flat (Opt)           32mm bevelled (Std)
                                                                           A      Nominal + 30mm        A     Nominal + 45mm
                                                                           B          46mm              B         28mm
                                                                           C          90mm              C         72mm
                                                                           D          25mm              D         32mm




Perforated plate grilles
Series PPG
Perforated plate grilles use a perforated steel core, to create a tamper
resistant unit providing a stable downward throw, perfect for
laboratories, hospital operating theatres etc.

Deflector plates can be fitted behind the face to allow different blow
patterns to be created.




                                                                               30mm flat flange (Opt)       37mm bevelled (Std)
                                                                           A     Nominal + 30mm         A     Nominal + 45mm
                                                                           B          28mm              B         28mm
                                                                           C          72mm              C         70mm
                                                                           D          30mm              D         37mm




       4               www.airtherm.co.uk
Linear bar grilles
Series LG
An extremely versatile grille series. Blade profiles include 0° with 3mm
or 6mm tops, 15° and 45°, all of which can be set on a 12.5mm or
20mm blade pitch.

Other options like removable and hinged cores are also available.

If required a reinforced linear bar grille can be offered, for use in floors
or walls where impact resistance is required.




                                                                                                       °        °         °

                                                                                                   °




                                                                                   31mm flat flange (Opt)                     36mm bevelled (Std)
                                                                               A     Nominal + 30mm                   A         Nominal + 45mm
                                                                               B           33mm                       B              33mm
                                                                               C           76mm                       C              76mm
                                                                               D           31mm                       D              36mm
                                                                               E    Actual neck + 15mm                E        Actual neck + 9mm




Computer room floor grilles - BS Heavy Grade                                                           Stock product
Series CFLG
                                                                                       600mm2 units are kept in stock for quick delivery.
Designed to suit raised access flooring systems, computer room floor
grilles have been tested to BS EN 13264:2001.

Manufactured from extruded aluminium throughout, the grilles have
supreme strength, yet are lightweight enough to allow one man to lift
and fit comfortably.




                                                                                                  www.airtherm.co.uk                        5
Grille & diffuser range continued
Fixed blade swirl diffusers                                                                          Stock product
Series FSW
                                                                                  The following sizes are kept in stock for quick delivery,
Fixed blade swirl diffusers are extremely effective diffusion units. They                            RAL9010 finish.
create a downward throw of swirling air which rapidly pulls in
surrounding air, mixing the supplied and resident air very effectively.               254mm, 356mm, 457mm, 533mm (Core sizes)




                                                                                SWF        A (mm)       B (mm)      C (mm)      D (mm)
                                                                                  1          595         254           80          40
                                                                                  2          595         356          100          40
                                                                                  3          595         457          160          40
                                                                                  4          595         533          200          40




Adjustable blade swirl diffusers                                                                     Stock product
Series SWA
                                                                            Adjustable blade swirl diffusers are kept in stock for quick delivery,
Just like their fixed counterparts, adjustable swirls are extemely                                     RAL9010 finish.
effective diffusion units.

Instead of pressed blades fixed at an angle, these have individually
adjustable, matt black deflector blades set behind the face. This
allows clockwise, anti-clockwise or straight down throws to be created.




                                                                                SWA        A (mm)       B (mm)      C (mm)
                                                                                  1          595          537         240


                                                                            Dimensions explained on fixed swirl diagram.

                                                                            Dimension B describes diameter between outermost points of
                                                                            deflector blades. Not a small spigot as with fixed swirls.




       6               www.airtherm.co.uk
Ceiling diffusers                                                                                       Stock product
Series CD
                                                                             The following sizes of four way blow ceiling diffuser are kept in stock for
A consistently popular product, ceiling diffusers are found in almost                                     quick delivery.
every commercial building.                                                         RAL9010 finish, with and without opposed blade dampers.

Made from extruded aluminium throughout, ceiling diffusers are                            1502, 2002, 2252, 3002, 3752, 5952 Overall face
guaranteed to be rattle free, unlike some cheaper pressed models.

All sizes under 1200mm x 1200mm have a spring-loaded removable
core as standard.




Drum jet diffusers
Series DJS
Providing an exceptionally long throw, drum jet diffusers are supply
units capable of handling large air volumes whilst also giving
maximum control over throw direction.

Stock product
All sizes shown in the table are kept in stock for quick delivery, in both
RAL9010 and satin anodised finish.




                                                                             Size   Nominal (mm)       Overall (mm)                Depth   Depth c/w
                                                                                                                         Depth
                                                                                      W       H          W       H                c/w OBD OBD & VED
                                                                              A      244                297
                                                                              B      321                373
                                                                                             164                208        62        106          194
                                                                              C      473                525
                                                                              D      625                678
                                                                              E      524                576
                                                                              F      651                703
                                                                                             259                303       100        144          232
                                                                              G      778                830
                                                                              H      905                957




                                                                                                    www.airtherm.co.uk                           7
Grille & diffuser range continued
Linear slot diffusers
Series LSD
Commonly seen in commercial installations, runs of unlimited lengths
can be created using multiple linear slot diffusers.

When used for supply, matt black internal deflectors can be specified
enabling throw adjustment. End caps and pressure equalising grids
can also be specified.

Slot boxes to suit can also be supplied.




                                                                                                         Overall face     Actual
                                                                                         Slot number
                                                                                                            (mm)        neck (mm)
                                                                                              1               76            40
                                                                                              2              115            78
                                                                                              3              154           117
                                                                                              4              193           155
                                                                                              5              232           193
                                                                                              6              271           232
                                                                                              7              310           270
                                                                                              8              349           309




Linear ceiling diffusers
Series LCD
Much like linear bar grilles in construction, linear ceiling diffusers use a
larger 45° blade set at a 20mm pitch. This creates a large free area for
high air volumes, whilst also having the blade surface to deflect air
effectively.

Available in one or two way blow models, with two ways having an
equal or unequal split.




                                                                                   32mm bevelled (Opt)                   25mm flat flange (Std)
                                                                               A     Nominal + 45mm                 A      Nominal + 30mm
                                                                               B         46mm                       B           46mm
                                                                               C         91mm                       C           91mm
                                                                               D         25mm                       D           32mm




       8                www.airtherm.co.uk
Perforated plate diffusers
Series PPD
Using the same outer frame as standard louvre faced ceiling diffusers,
perforated plate diffusers are tamper resistant, and create a stable
throw creating areas of clean supplied air.

This is in contrast to other units like ceiling diffusers which are
designed to mix supplied and resident air as quickly as possible.




Small format circular diffusers
Series SFCDA
Normally found in arenas, exhibition centres etc, circular diffusers are
suitable for use in large open plan areas requiring high changeover
rates.




                                                                           SIZE      DIMENSIONS (mm)
                                                                                     A      B      C
                                                                           150      257    149    225
                                                                           200      307    199    275
                                                                           250      357    249    325
                                                                           300      407    299    375
                                                                           350      457    349    425




                                                                                  www.airtherm.co.uk    9
Grille & diffuser range continued
Pressed steel grilles, diffusers and registers                        Intumescent fire blocks
A cost effective type of grille, normally used in domestic warm air   Fire rated for 1 hour, intumescent fire blocks expand quickly when
heating systems. Can also be used in fire doors in conjunction with   exposed to flames to create a barrier through which fire and smoke
intumescent fire blocks or slimline fire dampers.                     cannot pass.

                                                                      The intumescent material is covered with a smooth finish to help
                                                                      prevent dust build up and aiding cleaning.




                    Pressed steel ceiling diffuser
                            No.28 Type B                                                    Pressed steel floor diffuser
                 Incorporates a cord operated damper                                    Incorporates a roller operated damper




                         Pressed steel grille
                             No damper                                                         Pressed steel register
                                                                                        Incorporates a lever operated damper




      10              www.airtherm.co.uk
Curved access doors
Series ADC
Galvanised steel with blue plastic handles. Rubber seal between inner
and outer parts seals the duct once the door is tightened.



                                                                                            Stock product
                                                                          The following sizes are kept in stock for quick delivery.

                                                                                     Size                To suit duct diameter
                                                                              180mm x 80mnm                 100mm / 125mm
                                                                              250mm x 150mm                 150mm / 160mm
                                                                              250mm x 150mm                 180mm / 200mm
                                                                              250mm x 150mm                      250mm
                                                                              250mm x 150mm                 300mm / 315mm
                                                                              250mm x 150mm                 350mm / 355mm
                                                                              250mm x 150mm                 400mm / 500mm
                                                                              400mm x 300mm                      400mm
                                                                              400mm x 300mm                      450mm
                                                                              400mm x 300mm                      500mm
                                                                              400mm x 300mm                      560mm
                                                                              400mm x 300mm                      630mm
                                                                              400mm x 300mm                      710mm




Single blade dampers                                                                        Stock product
Series SBD
                                                                          The following sizes are kept in stock for quick delivery.
A cost effective volume control damper for use in small diameter
ductwork where a full shut off is not required.                         100mm, 125mm, 150mm, 200mm, 250mm, 300mm, 315mm.

Fitted with a locking quadrant for simple operation.

Body length 170mm on all sizes.




                                                                                        www.airtherm.co.uk                            11
Grille & diffuser range
Plenum boxes
Series PB
Although not a grille or diffuser, plenum boxes are just as integral in
the majority of ventilation systems.

Fire rated plenum boxes are available.




Grille & diffuser options
Polyester powder coating
                                                                             Grille/Diffuser type    PPC   OBD            Notes
The majority of grilles and diffusers shown in the catalogue can be
polyester powder coated to any RAL or BS colour.                            Single deflection
                                                                            Fixed blade
Some products cannot be powder coated due to plastic parts etc.
Please see the table.                                                       Double deflection
                                                                            Egg crate
                                                                            Non vision
Nylon coating                                                               Curved blade
                                                                            Perforated plate
A specialist finish, nylon coating is used in favour of polyester coating
where extreme durability or resistance to static electricity build up is    Linear bar
needed.                                                                     Computer room floor

These qualities mean computer room floor grilles are often nylon            Pressed steel grille            x
coated, as static electricity build-ups in data centres can be              Pressed steel register                   Includes damper
disasterous.
                                                                                                     x      x
                                                                            Pressed steel diffuser   x      x        Includes damper
                                                                            Ceiling diffuser
                                                                            Drum jet
Opposed blade dampers
                                                                            Linear slot
Fitted to the rear of many grilles and diffusers, opposed blade             Linear ceiling
dampers are used to trim the airflow through the terminal.
                                                                            Circular diffuser               x    Includes butterfly damper
Suitable for use in supply or extract situations.                           Fixed swirl                     x
Please see the table for which products can be fitted with OBDs.            Adjustable swirl         x      x         RAL9010 only




      12               www.airtherm.co.uk
Aluminium dampers
Volume control damper
Series VCD
A large format, all aluminium damper, HVC VCDs can be made in
larger sizes than their steel counterparts.

Using a protected push rod linkage means these dampers require
minimal torque to operate, even at large sizes.




Back draught shutter / Non return damper
Series BDS
Designed to permit airflow in one direction only, back draught shutters
are fully aluminium for excellent durability.

Blades can be linked and weighted if required to enable the damper to
open only once the required pressure has been reached.




                                                                          www.airtherm.co.uk   13
External louvre range
Standard single bank louvres                                          Stainless steel & galvanised louvres
Series WL                                                             Series WLSS & WLG
38mm, 50mm and 75mm pitch single bank louvres.                        Bespoke made to order, stainless and galvanised louvres can be
                                                                      made to replicate a regular format or custom made to your own
Single bank of blades provide good protection against rain ingress,   dimensions.
whilst preserving 50% free area for high airflow.
                                                                      Grades of stainless available are 430, 316 and 304.
Flanged, reversed frame, recessed frame and concealed (not on 38
pitch) units available. Bird and insect mesh optional.




                       Stock product
                                                                                                                                WL100
 The following sizes of 38mm pitch standard louvre are kept in
                    stock for quick delivery.                                      WL75
    Mill finish, powder coating to RAL/BS colour optional.

            1502, 2002, 2502, 3002, 3502, 4002, 4502,
            5002, 5502, 6002, 7002, 8002, 9002, 10002




                                                              WL50

                             WL38




      14              www.airtherm.co.uk
Acoustic louvres
Series AL
Using a two part hollow aluminium blade forming a cavity which is
then filled with mineral wool, acoustic louvres prevent noise transfer
without impeding airflow.

Available in 150mm, 300mm (standard) and 600mm deep models.




Sand trap louvres
Series STL                                                                  BSRIA testing to BS EN 13181:2001
Designed to be the first stage of filtration, sand trap louvres catch and   Tested by BSRIA to BS EN 13181:2001, sand trap louvres have been
collect airbourne particles like sand and grit which would otherwise        proven over 90% effective at 0.5m/s wind velocity, and over 60%
clog up finer filters inside the ventilation system.                        effective at 1 m/s wind velocity.

Constructed from two banks of interlocking vertical channels, all
straight paths through the unit are eliminated. Any caught material
then falls onto the slanted cill and is ejected through the front of the
louvre.




                                                                                               www.airtherm.co.uk                    15
External louvre range
High performance louvres - Class A
Series HPL
With the addition of two banks of vertical channels behind a standard
louvre, high performance louvres have been tested to confirmed to
give Class A levels of rain protection at velocities up to 0.5m/s.

The channels prevent any straight path through the unit, catching any
rain or spray which made it past the louvre blades. This caught water
then falls onto a special slanted drip cill which quickly ejects it through
the louvre face.




Penthouse louvres                                                             Options include:
Series PHL
                                                                                  Ÿ Doors.
Commonly used in natural ventilation systems, penthouse louvres are
perfect for high efficiency installations, like the new generation of             Ÿ Internal dividers (insulated or un-insulated).
school buildings and hospitals.
                                                                                  Ÿ Flat, single slant, double slant and HIP roofs.
Class A Penthouse Louvres can be manufactured using the same
blade arrangement as high performance louvres shown above.




      16                www.airtherm.co.uk
External louvre options
Polyester powder coating                                                    Bird mesh
All louvres shown in the catalogue can be polyester powder coated to        Screwed to the back of louvre blades, bird mesh prevents large
any RAL or BS colour.                                                       objects like leaves, rubbish and birds being able to penetrate the
                                                                            louvre.

                                                                            Bird mesh has no real effect on airflow.
Nylon coating
A specialist finish, nylon coating is used in favour of polyester coating
where extreme durability or resistance to static electricity build up is    Insect mesh
needed.
                                                                            With much smaller gaps than bird mesh, insect mesh prevents all but
                                                                            the smallest objects penetrating the louvre. The vast majority of
                                                                            insects and debris are caught.
Fixing methods
                                                                            Insect mesh will reduce a louvre’s free area.
Although normally drilled on site, louvres can be supplied with face
fixing holes in the flange, or rear mounted fixing lugs.




                                                                                                www.airtherm.co.uk                        17
Steel dampers
S100 Fire Dampers                                                            Certification
S100 Fire Dampers are standard fusible link operated curtain type fire       S100 Fire Dampers have been tested to and passed:
dampers.
                                                                             BS1366-2 (ISO10294-1): 4 Hour fire test at 300 Pa.
Spring driven to enable installation in vertical or horizontal alignments,   Test conducted by Building Research Establishment.
S100 dampers are available with HEVAC, plasterboard or curtain
frames and can be fitted with fixing lugs to suit drop rod installa          BS476-20: 6 Hour fire test.
                                                                             Test conducted by Warrington FRC.

                                                                             Fire damper cases are manufactured in accordance with DW144.




                                                                             Options
                                                                             Installation frames:   HEVAC
                                                                                                    Plasterboard
                                                                                                    Curtain
                                                                                                    Fixing lugs

                                                                             Material:              Fully galvanised
                                                                                                    Stainless blade pack & galvanised case
                                                                                                    Fully stainless
                                                                                                    Stainless available in 430, 316 and 304 grades.

                                                                             Connection types:      Square spigotted
                                                                                                    Circular spigotted
                                                                                                    Flat oval spigotted




S200 & S300 Fire Dampers                                                     Certification: S200
S200 fire dampers are designed to be fitted inside ductwork and as           S200 Fire Dampers have been tested to and passed:
such have no spigot. Spring driven they can be installed vertically or
horizontally.                                                                BS1366-2 (ISO10294-1): 4 Hour fire test at 300 Pa.
                                                                             Test conducted by Building Research Establishment.
S300 fire dampers are designed for use in fire doors as an alternative
to intumescent dampers. Exceptionally slim at 38mm deep, they are            BS476-20: 6 Hour fire test.
gravity driven and so must be installed vertically with the blade pack at    Test conducted by Warrington FRC.
the top.


                                                                             Certification: S300
                                                                             S300 Fire Dampers have been tested to and passed:

                                                                             BS476-20: 6 Hour fire test.
                                                                             Test conducted by Warrington FRC.




                                                                             Options
                                                                             Material:              Fully galvanised
                                                                                                    Stainless blade pack & galvanised case
                                                                                                    Fully stainless
                                                                                                    Stainless available in 430, 316 and 304 grades.

                                                                             Connection types:      Square flanged




      18               www.airtherm.co.uk
S600 Fire Smoke Dampers                                                 Certification
S600 Fire Smoke Dampers are as much a life safety device as a way       S600 Fire Smoke Dampers have been tested to and passed:
to protect buildings. Having an opposed blade construction and fitted
with actuators, they can be remote operated upon detection of smoke     BS476-20: 6 Hour fire test.
or fire anywhere in a building.                                         Test conducted by Warrington FRC.

We can supply and fit the full range of Belimo Fire Smoke Damper        Fire damper cases are manufactured in accordance with DW142.
actuators to S600 dampers.


                                                                        Options
                                                                        Installation frames:   HEVAC
                                                                                               Plasterboard
                                                                                               Curtain
                                                                                               Fixing lugs

                                                                        Material:              Fully galvanised
                                                                                               Stainless blade pack & galvanised case
                                                                                               Fully stainless
                                                                                               Stainless available in 430, 316 and 304 grades.

                                                                        Connection types:      Square spigotted
                                                                                               Circular spigotted
                                                                                               Flat oval spigotted




S900 Volume Control Dampers                                             Options
S900 Volume Control Dampers are a general purpose unit, best suited     Material:              Fully galvanised
to sizes under 1m2. Manufactured from roll formed galvanised or                                Stainless blades & galvanised case
stainless steel and with a fully protected gear drive mechanism, S900                          Aluminium blades and galvanised case
VCDs are extremely durable and require minimal maintenance.                                    Fully stainless
                                                                                               Stainless available in 430, 316 and 304 grades.
We can supply and fit the full range of Belimo actuators to your new
S900 Volume Control Dampers.                                            Connection types:      Square flanged
                                                                                               Square spigotted
                                                                                               Circular spigotted
                                                                                               Flat oval spigotted




                                                                                          www.airtherm.co.uk                       19
Plastic dampers for natural ventilation



Overview

Ultra high shut off
Excellent corrosion resistance

    The revolutionary uPVC Volume control damper
incorporates a copyrighted and never before seen
feature for a plastic volume damper. It’s unprecedented
performance originates with the unique ‘Eccentric
Aerofoil’© blade design. This unieu, incorporates a
blade with an off centre axis.
    This enables the edge seal to be complete, and
uninterrupted by blade axles. Combine this with the
integrated, specially designed blade nose seal which
fuses the blades together on closure, a performance
emulating that of a full shut off damper is achieved,
whilst still providing the excellent functionality of a
traditional volume control damper.




                                                                           uPVC volume control damper showing total seal




Specifications:
                                                                             Corrosion resistance                   Precision linkage

                                                                           In coastal or swimming pool           Manufactured from highly
Materials:        Extruded uPVC frame and blades.                          applications, traditional steel   corrosion resistant materials, the
                                                                            dampers will corrode very         custom designed gearset is so
                  Integrated flexible plastic blade nose seals.          quickly. uPVC on the other hand        precise it can drive up to 10
                                                                          has excellent resistance to salt   blades and cogs with very limited
                  Brush side seals.                                       and chlorine, and cannot rust.      play, for maximum performance
                                                                                                                     even at large sizes.
                  Rolled steel section inside each blade for
                  reinforcement (not exposed to airstream).

                  Stainless steel screws to join frame (not exposed to
                  airstream).

Finish:           White.

Sizes:            Minimum size 300mm x 300mm / 300mm Ø.

                  Maximum size 1000mm x 1000mm / 1000mm Ø.

                  Above these sizes units would be made in sections.




     20              www.airtherm.co.uk
Model A - Square, no spigot.         Model B - Square, spigotted.
                                                                       Model C - Circular, spigotted.
                                                                       Model D - Flat oval, spigotted.




Ultra high shut off
    In independent tests, large format uPVC volume control dampers                      Leakage (1000mm x 806mm uPVC VCD)
yielded leakage results normally only achieved by dedicated shut off
dampers.                                                                                           m3/s         m3/hr/m          m3/hr/m2
                                                                                    10Pa             0               0                 0
   The VCD sent for testing had a nominal size of 1000mm x
806mm, the large size tantamount to our confidence in the damper.                   25Pa         0.000857           0.29             3.83
                                                                                    50Pa         0.002850           0.97             12.73
    With even 10Pa rarely being exceeded in natural ventilation
situations, it is clear how uPVC volume control dampers can                         75Pa         0.004975           1.69             22.22
enhance the efficiency of your new natural ventilation system.
                                                                                   100Pa         0.005398           1.83             24.11
                                                                                   150Pa         0.007909           2.68             35.33



No cold bridge
                                                                                            Thermal conductivity of steel and
   Close a steel or aluminium volume control damper, and you will
                                                                                                      aluminium*
go on losing heat, not through airflow but conduction of heat from
one side to the other.                                                                                      Steel          Aluminium
                                                                                            W/mK             40              250
   HVC large format uPVC volume control dampers have a
                                                                                             Btu            23.12           144.46
theoretical U value of 0.973W/m2K when closed, atleast 40 times
better than a steel damper and 250 times better than an aluminium
unit.

   Of course this can help to cut heating bills, and reduces the
carbon footprint of any building using them.

*Figures sourced from www.engineeringtoolbox.com




                                                                                                  www.airtherm.co.uk                         21
Ÿ Flues & chimneys
Ÿ Natural ventilation & lighting
Ÿ Kitchen ventilation
Ÿ Air Conditioning
Ÿ Heat pumps & renewables
Ÿ Solar photovoltaic




                                              T: 0844 809 2509

                                               F: 01562 887312

                                              M: 07715 360958

                                          sales@airtherm.co.uk



                                                       Unit 8a
                                   Gainsborough Trading Estate
                                                 Rufford Road
w w w .a irthe rm.c o.uk                           Stourbridge
                                                West Midlands
                                                      DY9 7ND

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Airtherm grilles & louvre booklet

  • 1. 2013 product line Grilles Diffusers External Louvres Dampers
  • 2. Grille & diffuser range Single deflection and fixed blade grilles Series SD & FB Single deflection grilles have a single bank of fully adjustable blades for throw adjustment in one plane. Fixed blade grilles have the blade pack fixed at either 0°, 15° or 45°. 25mm flat (Opt) 32mm bevelled (Std) A Nominal + 30mm A Nominal + 45mm B 46mm B 28mm C 90mm C 72mm D 25mm D 32mm Double deflection grilles Stock product Series DD The following sizes are kept in stock for quick delivery. Double deflection grilles add a second set of adjustable blades, set at Satin anodised and RAL9010 available. 90° to the first set. This allows throw adjustment in both planes, allowing greater throw adjustment than single deflection grilles. 1502, 2002, 2502, 3002, 3502, 4002, 4502, 5002 200 x 150, 300 x 150, 300 x 200, 400 x 200 25mm flat (Opt) 32mm bevelled (Std) A Nominal + 30mm A Nominal + 45mm B 46mm B 46mm C 90mm C 90mm D 25mm D 32mm 2 www.airtherm.co.uk
  • 3. Egg crate grilles Stock product Series ECG The following sizes are kept in stock for quick delivery. The industry standard extract grille, egg crate grilles have a free area RAL9010 finish, with and without opposed blade dampers. of around 90%, meaning they can handle large air volumes with minimal pressure drops or noise generation. 1502, 2002, 2502, 3002, 3502, 4002, 4502, 5002, 5952 Overall face 30mm flat (Opt) 37mm bevelled (Std) A Nominal + 30mm A Nominal + 45mm B 28mm B 28mm C 72mm C 70mm D 30mm D 37mm Non vision grilles Series NV NV1 Designed to block line of sight from all angles (NV4 from most), non vision grilles are used where privacy must be maintained, like bathrooms and doctors surgeries. NV2 Door NV3 Darkrooms NV4 Surface mounted www.airtherm.co.uk 3
  • 4. Grille & diffuser range continued Curved blade (eyelash) grilles Series CB Curved blade grilles have an unconventional appearance, and allow throw adjustment thanks to the single bank of individually adjustable blades. 1, 2, 3 and 4 way blow set ups available. 25mm flat (Opt) 32mm bevelled (Std) A Nominal + 30mm A Nominal + 45mm B 46mm B 28mm C 90mm C 72mm D 25mm D 32mm Perforated plate grilles Series PPG Perforated plate grilles use a perforated steel core, to create a tamper resistant unit providing a stable downward throw, perfect for laboratories, hospital operating theatres etc. Deflector plates can be fitted behind the face to allow different blow patterns to be created. 30mm flat flange (Opt) 37mm bevelled (Std) A Nominal + 30mm A Nominal + 45mm B 28mm B 28mm C 72mm C 70mm D 30mm D 37mm 4 www.airtherm.co.uk
  • 5. Linear bar grilles Series LG An extremely versatile grille series. Blade profiles include 0° with 3mm or 6mm tops, 15° and 45°, all of which can be set on a 12.5mm or 20mm blade pitch. Other options like removable and hinged cores are also available. If required a reinforced linear bar grille can be offered, for use in floors or walls where impact resistance is required. ° ° ° ° 31mm flat flange (Opt) 36mm bevelled (Std) A Nominal + 30mm A Nominal + 45mm B 33mm B 33mm C 76mm C 76mm D 31mm D 36mm E Actual neck + 15mm E Actual neck + 9mm Computer room floor grilles - BS Heavy Grade Stock product Series CFLG 600mm2 units are kept in stock for quick delivery. Designed to suit raised access flooring systems, computer room floor grilles have been tested to BS EN 13264:2001. Manufactured from extruded aluminium throughout, the grilles have supreme strength, yet are lightweight enough to allow one man to lift and fit comfortably. www.airtherm.co.uk 5
  • 6. Grille & diffuser range continued Fixed blade swirl diffusers Stock product Series FSW The following sizes are kept in stock for quick delivery, Fixed blade swirl diffusers are extremely effective diffusion units. They RAL9010 finish. create a downward throw of swirling air which rapidly pulls in surrounding air, mixing the supplied and resident air very effectively. 254mm, 356mm, 457mm, 533mm (Core sizes) SWF A (mm) B (mm) C (mm) D (mm) 1 595 254 80 40 2 595 356 100 40 3 595 457 160 40 4 595 533 200 40 Adjustable blade swirl diffusers Stock product Series SWA Adjustable blade swirl diffusers are kept in stock for quick delivery, Just like their fixed counterparts, adjustable swirls are extemely RAL9010 finish. effective diffusion units. Instead of pressed blades fixed at an angle, these have individually adjustable, matt black deflector blades set behind the face. This allows clockwise, anti-clockwise or straight down throws to be created. SWA A (mm) B (mm) C (mm) 1 595 537 240 Dimensions explained on fixed swirl diagram. Dimension B describes diameter between outermost points of deflector blades. Not a small spigot as with fixed swirls. 6 www.airtherm.co.uk
  • 7. Ceiling diffusers Stock product Series CD The following sizes of four way blow ceiling diffuser are kept in stock for A consistently popular product, ceiling diffusers are found in almost quick delivery. every commercial building. RAL9010 finish, with and without opposed blade dampers. Made from extruded aluminium throughout, ceiling diffusers are 1502, 2002, 2252, 3002, 3752, 5952 Overall face guaranteed to be rattle free, unlike some cheaper pressed models. All sizes under 1200mm x 1200mm have a spring-loaded removable core as standard. Drum jet diffusers Series DJS Providing an exceptionally long throw, drum jet diffusers are supply units capable of handling large air volumes whilst also giving maximum control over throw direction. Stock product All sizes shown in the table are kept in stock for quick delivery, in both RAL9010 and satin anodised finish. Size Nominal (mm) Overall (mm) Depth Depth c/w Depth W H W H c/w OBD OBD & VED A 244 297 B 321 373 164 208 62 106 194 C 473 525 D 625 678 E 524 576 F 651 703 259 303 100 144 232 G 778 830 H 905 957 www.airtherm.co.uk 7
  • 8. Grille & diffuser range continued Linear slot diffusers Series LSD Commonly seen in commercial installations, runs of unlimited lengths can be created using multiple linear slot diffusers. When used for supply, matt black internal deflectors can be specified enabling throw adjustment. End caps and pressure equalising grids can also be specified. Slot boxes to suit can also be supplied. Overall face Actual Slot number (mm) neck (mm) 1 76 40 2 115 78 3 154 117 4 193 155 5 232 193 6 271 232 7 310 270 8 349 309 Linear ceiling diffusers Series LCD Much like linear bar grilles in construction, linear ceiling diffusers use a larger 45° blade set at a 20mm pitch. This creates a large free area for high air volumes, whilst also having the blade surface to deflect air effectively. Available in one or two way blow models, with two ways having an equal or unequal split. 32mm bevelled (Opt) 25mm flat flange (Std) A Nominal + 45mm A Nominal + 30mm B 46mm B 46mm C 91mm C 91mm D 25mm D 32mm 8 www.airtherm.co.uk
  • 9. Perforated plate diffusers Series PPD Using the same outer frame as standard louvre faced ceiling diffusers, perforated plate diffusers are tamper resistant, and create a stable throw creating areas of clean supplied air. This is in contrast to other units like ceiling diffusers which are designed to mix supplied and resident air as quickly as possible. Small format circular diffusers Series SFCDA Normally found in arenas, exhibition centres etc, circular diffusers are suitable for use in large open plan areas requiring high changeover rates. SIZE DIMENSIONS (mm) A B C 150 257 149 225 200 307 199 275 250 357 249 325 300 407 299 375 350 457 349 425 www.airtherm.co.uk 9
  • 10. Grille & diffuser range continued Pressed steel grilles, diffusers and registers Intumescent fire blocks A cost effective type of grille, normally used in domestic warm air Fire rated for 1 hour, intumescent fire blocks expand quickly when heating systems. Can also be used in fire doors in conjunction with exposed to flames to create a barrier through which fire and smoke intumescent fire blocks or slimline fire dampers. cannot pass. The intumescent material is covered with a smooth finish to help prevent dust build up and aiding cleaning. Pressed steel ceiling diffuser No.28 Type B Pressed steel floor diffuser Incorporates a cord operated damper Incorporates a roller operated damper Pressed steel grille No damper Pressed steel register Incorporates a lever operated damper 10 www.airtherm.co.uk
  • 11. Curved access doors Series ADC Galvanised steel with blue plastic handles. Rubber seal between inner and outer parts seals the duct once the door is tightened. Stock product The following sizes are kept in stock for quick delivery. Size To suit duct diameter 180mm x 80mnm 100mm / 125mm 250mm x 150mm 150mm / 160mm 250mm x 150mm 180mm / 200mm 250mm x 150mm 250mm 250mm x 150mm 300mm / 315mm 250mm x 150mm 350mm / 355mm 250mm x 150mm 400mm / 500mm 400mm x 300mm 400mm 400mm x 300mm 450mm 400mm x 300mm 500mm 400mm x 300mm 560mm 400mm x 300mm 630mm 400mm x 300mm 710mm Single blade dampers Stock product Series SBD The following sizes are kept in stock for quick delivery. A cost effective volume control damper for use in small diameter ductwork where a full shut off is not required. 100mm, 125mm, 150mm, 200mm, 250mm, 300mm, 315mm. Fitted with a locking quadrant for simple operation. Body length 170mm on all sizes. www.airtherm.co.uk 11
  • 12. Grille & diffuser range Plenum boxes Series PB Although not a grille or diffuser, plenum boxes are just as integral in the majority of ventilation systems. Fire rated plenum boxes are available. Grille & diffuser options Polyester powder coating Grille/Diffuser type PPC OBD Notes The majority of grilles and diffusers shown in the catalogue can be polyester powder coated to any RAL or BS colour. Single deflection Fixed blade Some products cannot be powder coated due to plastic parts etc. Please see the table. Double deflection Egg crate Non vision Nylon coating Curved blade Perforated plate A specialist finish, nylon coating is used in favour of polyester coating where extreme durability or resistance to static electricity build up is Linear bar needed. Computer room floor These qualities mean computer room floor grilles are often nylon Pressed steel grille x coated, as static electricity build-ups in data centres can be Pressed steel register Includes damper disasterous. x x Pressed steel diffuser x x Includes damper Ceiling diffuser Drum jet Opposed blade dampers Linear slot Fitted to the rear of many grilles and diffusers, opposed blade Linear ceiling dampers are used to trim the airflow through the terminal. Circular diffuser x Includes butterfly damper Suitable for use in supply or extract situations. Fixed swirl x Please see the table for which products can be fitted with OBDs. Adjustable swirl x x RAL9010 only 12 www.airtherm.co.uk
  • 13. Aluminium dampers Volume control damper Series VCD A large format, all aluminium damper, HVC VCDs can be made in larger sizes than their steel counterparts. Using a protected push rod linkage means these dampers require minimal torque to operate, even at large sizes. Back draught shutter / Non return damper Series BDS Designed to permit airflow in one direction only, back draught shutters are fully aluminium for excellent durability. Blades can be linked and weighted if required to enable the damper to open only once the required pressure has been reached. www.airtherm.co.uk 13
  • 14. External louvre range Standard single bank louvres Stainless steel & galvanised louvres Series WL Series WLSS & WLG 38mm, 50mm and 75mm pitch single bank louvres. Bespoke made to order, stainless and galvanised louvres can be made to replicate a regular format or custom made to your own Single bank of blades provide good protection against rain ingress, dimensions. whilst preserving 50% free area for high airflow. Grades of stainless available are 430, 316 and 304. Flanged, reversed frame, recessed frame and concealed (not on 38 pitch) units available. Bird and insect mesh optional. Stock product WL100 The following sizes of 38mm pitch standard louvre are kept in stock for quick delivery. WL75 Mill finish, powder coating to RAL/BS colour optional. 1502, 2002, 2502, 3002, 3502, 4002, 4502, 5002, 5502, 6002, 7002, 8002, 9002, 10002 WL50 WL38 14 www.airtherm.co.uk
  • 15. Acoustic louvres Series AL Using a two part hollow aluminium blade forming a cavity which is then filled with mineral wool, acoustic louvres prevent noise transfer without impeding airflow. Available in 150mm, 300mm (standard) and 600mm deep models. Sand trap louvres Series STL BSRIA testing to BS EN 13181:2001 Designed to be the first stage of filtration, sand trap louvres catch and Tested by BSRIA to BS EN 13181:2001, sand trap louvres have been collect airbourne particles like sand and grit which would otherwise proven over 90% effective at 0.5m/s wind velocity, and over 60% clog up finer filters inside the ventilation system. effective at 1 m/s wind velocity. Constructed from two banks of interlocking vertical channels, all straight paths through the unit are eliminated. Any caught material then falls onto the slanted cill and is ejected through the front of the louvre. www.airtherm.co.uk 15
  • 16. External louvre range High performance louvres - Class A Series HPL With the addition of two banks of vertical channels behind a standard louvre, high performance louvres have been tested to confirmed to give Class A levels of rain protection at velocities up to 0.5m/s. The channels prevent any straight path through the unit, catching any rain or spray which made it past the louvre blades. This caught water then falls onto a special slanted drip cill which quickly ejects it through the louvre face. Penthouse louvres Options include: Series PHL Ÿ Doors. Commonly used in natural ventilation systems, penthouse louvres are perfect for high efficiency installations, like the new generation of Ÿ Internal dividers (insulated or un-insulated). school buildings and hospitals. Ÿ Flat, single slant, double slant and HIP roofs. Class A Penthouse Louvres can be manufactured using the same blade arrangement as high performance louvres shown above. 16 www.airtherm.co.uk
  • 17. External louvre options Polyester powder coating Bird mesh All louvres shown in the catalogue can be polyester powder coated to Screwed to the back of louvre blades, bird mesh prevents large any RAL or BS colour. objects like leaves, rubbish and birds being able to penetrate the louvre. Bird mesh has no real effect on airflow. Nylon coating A specialist finish, nylon coating is used in favour of polyester coating where extreme durability or resistance to static electricity build up is Insect mesh needed. With much smaller gaps than bird mesh, insect mesh prevents all but the smallest objects penetrating the louvre. The vast majority of insects and debris are caught. Fixing methods Insect mesh will reduce a louvre’s free area. Although normally drilled on site, louvres can be supplied with face fixing holes in the flange, or rear mounted fixing lugs. www.airtherm.co.uk 17
  • 18. Steel dampers S100 Fire Dampers Certification S100 Fire Dampers are standard fusible link operated curtain type fire S100 Fire Dampers have been tested to and passed: dampers. BS1366-2 (ISO10294-1): 4 Hour fire test at 300 Pa. Spring driven to enable installation in vertical or horizontal alignments, Test conducted by Building Research Establishment. S100 dampers are available with HEVAC, plasterboard or curtain frames and can be fitted with fixing lugs to suit drop rod installa BS476-20: 6 Hour fire test. Test conducted by Warrington FRC. Fire damper cases are manufactured in accordance with DW144. Options Installation frames: HEVAC Plasterboard Curtain Fixing lugs Material: Fully galvanised Stainless blade pack & galvanised case Fully stainless Stainless available in 430, 316 and 304 grades. Connection types: Square spigotted Circular spigotted Flat oval spigotted S200 & S300 Fire Dampers Certification: S200 S200 fire dampers are designed to be fitted inside ductwork and as S200 Fire Dampers have been tested to and passed: such have no spigot. Spring driven they can be installed vertically or horizontally. BS1366-2 (ISO10294-1): 4 Hour fire test at 300 Pa. Test conducted by Building Research Establishment. S300 fire dampers are designed for use in fire doors as an alternative to intumescent dampers. Exceptionally slim at 38mm deep, they are BS476-20: 6 Hour fire test. gravity driven and so must be installed vertically with the blade pack at Test conducted by Warrington FRC. the top. Certification: S300 S300 Fire Dampers have been tested to and passed: BS476-20: 6 Hour fire test. Test conducted by Warrington FRC. Options Material: Fully galvanised Stainless blade pack & galvanised case Fully stainless Stainless available in 430, 316 and 304 grades. Connection types: Square flanged 18 www.airtherm.co.uk
  • 19. S600 Fire Smoke Dampers Certification S600 Fire Smoke Dampers are as much a life safety device as a way S600 Fire Smoke Dampers have been tested to and passed: to protect buildings. Having an opposed blade construction and fitted with actuators, they can be remote operated upon detection of smoke BS476-20: 6 Hour fire test. or fire anywhere in a building. Test conducted by Warrington FRC. We can supply and fit the full range of Belimo Fire Smoke Damper Fire damper cases are manufactured in accordance with DW142. actuators to S600 dampers. Options Installation frames: HEVAC Plasterboard Curtain Fixing lugs Material: Fully galvanised Stainless blade pack & galvanised case Fully stainless Stainless available in 430, 316 and 304 grades. Connection types: Square spigotted Circular spigotted Flat oval spigotted S900 Volume Control Dampers Options S900 Volume Control Dampers are a general purpose unit, best suited Material: Fully galvanised to sizes under 1m2. Manufactured from roll formed galvanised or Stainless blades & galvanised case stainless steel and with a fully protected gear drive mechanism, S900 Aluminium blades and galvanised case VCDs are extremely durable and require minimal maintenance. Fully stainless Stainless available in 430, 316 and 304 grades. We can supply and fit the full range of Belimo actuators to your new S900 Volume Control Dampers. Connection types: Square flanged Square spigotted Circular spigotted Flat oval spigotted www.airtherm.co.uk 19
  • 20. Plastic dampers for natural ventilation Overview Ultra high shut off Excellent corrosion resistance The revolutionary uPVC Volume control damper incorporates a copyrighted and never before seen feature for a plastic volume damper. It’s unprecedented performance originates with the unique ‘Eccentric Aerofoil’© blade design. This unieu, incorporates a blade with an off centre axis. This enables the edge seal to be complete, and uninterrupted by blade axles. Combine this with the integrated, specially designed blade nose seal which fuses the blades together on closure, a performance emulating that of a full shut off damper is achieved, whilst still providing the excellent functionality of a traditional volume control damper. uPVC volume control damper showing total seal Specifications: Corrosion resistance Precision linkage In coastal or swimming pool Manufactured from highly Materials: Extruded uPVC frame and blades. applications, traditional steel corrosion resistant materials, the dampers will corrode very custom designed gearset is so Integrated flexible plastic blade nose seals. quickly. uPVC on the other hand precise it can drive up to 10 has excellent resistance to salt blades and cogs with very limited Brush side seals. and chlorine, and cannot rust. play, for maximum performance even at large sizes. Rolled steel section inside each blade for reinforcement (not exposed to airstream). Stainless steel screws to join frame (not exposed to airstream). Finish: White. Sizes: Minimum size 300mm x 300mm / 300mm Ø. Maximum size 1000mm x 1000mm / 1000mm Ø. Above these sizes units would be made in sections. 20 www.airtherm.co.uk
  • 21. Model A - Square, no spigot. Model B - Square, spigotted. Model C - Circular, spigotted. Model D - Flat oval, spigotted. Ultra high shut off In independent tests, large format uPVC volume control dampers Leakage (1000mm x 806mm uPVC VCD) yielded leakage results normally only achieved by dedicated shut off dampers. m3/s m3/hr/m m3/hr/m2 10Pa 0 0 0 The VCD sent for testing had a nominal size of 1000mm x 806mm, the large size tantamount to our confidence in the damper. 25Pa 0.000857 0.29 3.83 50Pa 0.002850 0.97 12.73 With even 10Pa rarely being exceeded in natural ventilation situations, it is clear how uPVC volume control dampers can 75Pa 0.004975 1.69 22.22 enhance the efficiency of your new natural ventilation system. 100Pa 0.005398 1.83 24.11 150Pa 0.007909 2.68 35.33 No cold bridge Thermal conductivity of steel and Close a steel or aluminium volume control damper, and you will aluminium* go on losing heat, not through airflow but conduction of heat from one side to the other. Steel Aluminium W/mK 40 250 HVC large format uPVC volume control dampers have a Btu 23.12 144.46 theoretical U value of 0.973W/m2K when closed, atleast 40 times better than a steel damper and 250 times better than an aluminium unit. Of course this can help to cut heating bills, and reduces the carbon footprint of any building using them. *Figures sourced from www.engineeringtoolbox.com www.airtherm.co.uk 21
  • 22. Ÿ Flues & chimneys Ÿ Natural ventilation & lighting Ÿ Kitchen ventilation Ÿ Air Conditioning Ÿ Heat pumps & renewables Ÿ Solar photovoltaic T: 0844 809 2509 F: 01562 887312 M: 07715 360958 sales@airtherm.co.uk Unit 8a Gainsborough Trading Estate Rufford Road w w w .a irthe rm.c o.uk Stourbridge West Midlands DY9 7ND