1. Benefits
Operating kitchen extraction equipment in a clean and efficient state offers the following benefits: -
Fire Safety
By removing the combustion load fire safety is greatly enhanced. This is why the Insurers' Loss Prevention Council
recommends regular cleaning by specialists.
Hygiene
You can show any inspector that there is 'no hiding place' for pests and germs. Unhygienic and unsightly leakage
of liquid grease/oil or backwash of fouled air is avoided.
Odour
Any smell of rancid grease or food products is controlled. System efficiency improves the containment of kitchen
smells. Clean, efficient extract systems properly draw out heat, steam and fume to improve kitchen-working
conditions.
Maintenance Code Compliance
The Loss Prevention Council RC16A and RC16B advice recommends cleaning at least annually by specialists and
the HVCA Guide to Good Practice TR19: ‘Cleanliness of Ventilation Systems’ (1998) provides recommended service
frequencies based on usage.
Reliability
Fan breakdown resulting in loss of service and possible fire risk due to over-loading of the fan blades or to
jamming of fan blades against hardened grease is guarded against.
Deep Clean Service offers a verifiably high quality service and value for money through a combination of
technology, experience and specialist skills. Kitchen extract (grease) cleaning is achieved effectively, safely and
cleanly using modern bio-chemical techniques as described below. Optional cleaning of the riser duct is carried out
using Sprayment remote cleaning equipment, which is capable of removing non-baked grease, which is more
volatile and prone to rancidity.

2. Extraction Clean
Grease Filters
Grease filters will be removed and soaked in a degreasing agent prior to high pressure steam cleaning.
Extraction Canopy
All equipment to be covered where necessary prior to the commencement of cleaning. The structure of the canopy
to be cleaned internally and externally using detergent and degreased to include filter housing, light fittings then
rinsed out using clean hot water and polished where applicable.
Ducting
The kitchen extract ductwork will be cleaned by means of stiff-foam application of a low toxicity degreaser to
remove grease and fibrous deposits. Where grease has become carbonised it may be cleaned by means of gel
application of a specialised chemical treatment. This method requires the careful application of safety measures
such as the use of Personal Protective Equipment for operatives. For routine service cleans the plant will be
thoroughly internally cleaned by a combination of direct application of the above cleaner solutions and by hand
wiping.
Extractor Fans
All equipment is to be isolated and dismantled. Items such as fan blades, fixing brackets and fan guards (where
possible) are to be taken out and immersed in a soak tank. The structure to be degreased and de-carbonised using
a heavy duty degreaser, scrapers and wire brushes will be used where necessary to remove heavy deposits, all
areas to be rinsed and dried, recommissioned after reassembly.

3. Access Hatch Installation
Description
This unique range of curved duct access doors is designed to provide inexpensive and trouble free access to fire
and volume control dampers and associated ventilation and air conditioning equipment mounted within ductwork.
Correctly installed, these doors provide an airtight seal up to 2500 Pa. In this respect they meet the requirements
of HVCA DW142 specification, classes A, B, C and D.
The range of four sizes has been carefully selected to provide suitably sized apertures relative to the size of
ducting selected.
Doors are available to suit duct diameters from 100mm to 2000mm diameter.
Every door is supplied complete with a self-adhesive template, which eliminates the need for any measuring or
marking out.
Specification
Door Panels - Corrosion resistant galvanised mild steel.
Locking Knob - Polyamide.
Bolts/Nuts - Zinc plated mild steel.
Gasket - Inert neoprene cellular sponge gasket that will not support combustion in its installed state.
Description
The range of access doors is designed to provide rapid access to smoke, fire and volume control dampers or other
equipment mounted inside ductwork or associated plant. All door panels are of double skin construction completely
enclosing the 25mm thick high-density insulation.

4. Features
The series of rectangular doors provide a number of unique advantages: -
• All doors are manufactured using C.N.C plant, which ensures "close fit" tolerances and "repeatable" quality
door after door.
• All doors are fitted with a "pull-ring" to enable doors to be easily removed and re-fitted.
• Fixing tabs have rounded edges to reduce the possibility of fitters & inspection engineers suffering cuts.
• Cam locks & strike plates are manufactured from heavy gauge steel, zinc plated to prevent twisting and
deformation.
• Every door is fitted with two gaskets, one between door and frame and a second on the back face of the
frame to ensure a good seal between frame and ductwork.
• High quality EDPM gaskets used throughout.
• The internal gasket is "key-locked" to prevent any leakage through corners.
• High-density 33Kg/m3 rockwool insulation.
• Independently tested at BSRIA.
Technical
The series of rectangular access doors have been successfully independently type tested by BSRIA for compliance
to HVCA standard DW142. The products were tested to Class D with a maximum operating pressure of 2500 Pa
positive and 750 Pa negative.
Product Data
Options
• Stainless steel doors and frames.
• 50mm thick insulated doors.
• "Piano" hinge on one edge when hinged doors are required, product reference "RDH".
• Safety chain between door and frame, product reference "RDSC".
• Other sizes to special order.
Specification
Doors and frames are manufactured from 0.8mm nominal corrosion resistant galvanised steel and fitted with
1.5mm steel zinc plated cam locks closing onto 1.00mm steel zinc plated hooks. EDPM gaskets are fitted to both
faces of the frame. Insulation: 33Kg/m3 Rockwool.