Peter Dyment ~ Energy Consultant ~ Camfil Farr People see the Air Conditioning Energy Inspections as a burden rather than a benefit, instead of seeing the AC Inspection as an opportunity to get air conditioning systems to run better & “save energy” “save carbon” “save money” & Improve Indoor Air Quality (IAQ )

1. Welcome to the Camfil Farr Training Academy
This webinar shows the benefits Low Energy Air Filters and
how they deliver Sustainable Air Quality The combination of
optimum Air Quality and Energy Efficiency are a key feature.
© CAMFIL FARR 11-03-28
1

2. Low Energy Air Filters Production Facility ●
Sales Office ●
Agent ●
Head Office ●
© CAMFIL FARR 11-03-28
2010 global sales £430 million
24 Production Plants, 4 R&D Centres
2
3400 employees

3. Camfil Farr Low Energy Air Filters save
Money, Energy and Carbon
But also deliver Sustainable Air Quality 3

4. Stay healthy – with better Indoor Air Quality (IAQ)
• Low Energy Air Filters deliver
sustainable air quality
• Health benefits from reduced levels
of PM2.5 fine particulates.
• Reduction in illness due to the
effects of air pollution and staff
productivity improvements
• Air pollution adversely affects the
growth of lung function during the
period of rapid lung development
© CAMFIL FARR 11-03-28
that occurs between the ages of 10
and 18. (The New England Journal of Medicine)
4

5. Health risk filtering out - Supply Air Pollution
reduced
• 50, 000 people in the UK die before
their time because of particle
pollutants (HMG report 0310)
• Particles of fine soot are the most
dangerous for one’s health
(combustion particles)
• Combustion particles are very
small <1 µm and toxic
© CAMFIL FARR 11-03-28
• These ultra-small particles causes
heart- and vascular disorders
5

6. Air Quality problems in the UK
UK Government report indicates
PM2.5 pollution is 3X more
damaging to public health than
passive smoking.
5X more damaging than loss of life
due to road accidents
© CAMFIL FARR 11-03-28
6

7. Low Energy Air Filters for Indoor Air Quality
Why we need Air Filters?
The primary purpose of Air Filters in building HVAC systems is to filter
and clean air for people to breathe without risk to health.
The secondary purpose of Air Filters in building HVAC systems is to
filter air to keep clean and protect the air plant duct system and the
internal fabric of the building.
© CAMFIL FARR 11-03-28
7

8. The relevant standards for Low Energy Air Filters
The filter test standard
that applies to the
testing of air filters is
EN779:2002
EN13779:2007 advises
F7 as a minimum and
F9 as the advised for
required particulate
© CAMFIL FARR 11-03-28
efficiency
www.camfil.co.uk 8

9. Particulate Efficiency %
© CAMFIL FARR 11-03-28
Particle Size Microns
9

10. Particulate Efficiency %
© CAMFIL FARR 11-03-28
Particle Size Microns
10

11. Particulate Efficiency %
© CAMFIL FARR 11-03-28
Particle Size Microns
11

12. Fixed Resistance? Energy Consumed by Air Filters Air
Handling Unit
Cooling coil Heating coil
Sound
attenuator
FAN
MOTOR
© CAMFIL FARR 11-03-28
Variable Resistance?
Pre-filter
Gas-filter Secondary-filter 12
(Carbon)

13. Energy consumed by air filters
Clean air with economic benefits
The cost of ventilation
Pascal
• The energy requirement for 40%
ventilation is expensive.
30% of total system
• Filters account for approx. 30% of pressure loss
the total energy cost of the
20%
system. (C.I.B.S.E. data)
• Filters are the most inexpensive
part of the system to improve. 4%
© CAMFIL FARR 11-03-28
• Without Capital Expenditure
13

14. Energy consumed by air filters
Example of urban offices block and savings
Office block 8000M2 floor
area with 30 full size filter
apertures. (3 AHU’s)
This office block can show an
energy saving of £ 14430 per
year with the equivalent of 3
© CAMFIL FARR 11-03-28
AHU’s as shown in the next slide.
14

15. Energy consumed by air filters
Energy saving on one AHU volume flow 10m3/s over one year
Replaced by
F7 Bag + G4 Panel F7 Hi-Flo Bag
2.9 M2 Media 9.2 M2 Media
© CAMFIL FARR 11-03-28
This represents a money saving of £ 4810 per year on this
AHU or saving of over 70% on electric energy.
15

16. How we optimise our air filter selection
Impact assessment
• 200 Buildings
• Serviced by 5 air handing units
• Each having 10 standard 2 stage apertures
• Number of 2 Stage apertures
• 200 x 5 x 10 = 10,000 apertures
• Will make annual Energy savings (considered on above criteria)
• WILL SAVE ENERGY VALUE OVER 2.3 MILLION POUNDS
• EACH YEAR EVERY YEAR
16

17. How we optimise our
Low Energy Air Filter selection
A Hi-flo F7 M7 Bag filter
with 9.2 M2 of micro-
fibre media has the
optimum low pressure
drop and consistent high
particulate efficiency
with a longer working life
BS:EN13779:2007 advises F7 minimum efficiency 17

18. Energy consumed by Air Filters Clean air with economic benefits
Choosing the right bag filter saves Energy
• Low Energy Air Filters use an
optimised design in order to
minimise energy consumption
with Tapered stitch on
pockets.
Poorly manufactured pockets lose
performance, use more energy
18

19. The energy demand
Clean air with economic benefits
his equation calculates the kilowatt hours consumed by an element of a
ventilation system based upon average pressure loss
q ×dP × t
E= [ kWh/year]
η ×1000
q = Air flow (m3/s)
dP = Pressure drop (Pa)
© CAMFIL FARR 11-03-28
t = Operating time (hours/year)
h = Fan efficiency (20% - 65% ?)
19

20. Life cycle costing & air system factors
Clean air with economic benefits
Energy is part of the LCC model
The life cycle cost for the filter is the cost of the:
• Filters
• Labour
• Energy consumption
• Cleaning of ventilation system
© CAMFIL FARR 11-03-28
• Disposal of used filter
= LCC
20

21. Check the Indoor Air Quality Factor (IAQ factor)
The IAQ factor is found by
dividing the LCC by the
MLE. It tells you how much
filter performance you are
getting for your money.
EG. M7 F7 bag = 24.7 IAQ
G4 S-Flo-F7 bag = 154.6 IAQ
6.25 X per % minimum life
efficiency (MLE)
21

22. Energy Optimisation with Low Energy Air Filters
For example using F7 filter grade as advised by BS:EN13779:2007
Options:
6 pocket 380mm long bag has about 200pa pressure drop initially
12 pocket 635mm long bag has about 85pa pressure drop initially
Over a period of one year allowing for the pressure drop increases as
the filters work the estimated save in energy consumption as below.
**Energy £300 the difference in filter price is about £30**
© CAMFIL FARR 11-03-28
(Ratio 10:1 at 10p per KW/hr.)
22

23. Filter optimisation gives shortest payback time
Annual Savings – for a 10 m3/s system
Element % Kwhr £ Revenue or capital Payback
Upgrade filters 22% 6000 600 Revenue < 3 months
Clean coils 10% 2500 250 Revenue < 6 months
Upgrade fans 35% 60000 6000 Capital > 24 months
Upgrade chillers 40% 136000 13600 Capital > 36 months
© CAMFIL FARR 11-03-28
Table is prioritised by payback period
Data source – EECO2 Energy Efficiency Consultants (Low Carbon Consultants)
23

24. Low Energy Air Filter Service Packages
• Low Energy Air Filter
AHU filter mounting
upgrades
• Complete Low Energy
Air Filter installation and
maintenance contracts
• AHU filter monitoring
with demonstration of
benefits
© CAMFIL FARR 11-03-28
• Additional Duct cleaning
and coil cleaning AHU
system packages. 24

25. Take the Energy Saving Opportunity
£14430 per year Low Energy Air Filters
There are over 36000 buildings and
only about 10% have been inspected
© CAMFIL FARR 11-03-28
25

26. THANK YOU
for attending this webinar session
ANY QUESTIONS?
Please do not hesitate to contact Camfil Farr for any additional
information or to arrange a visit.
For more information about clean air solutions, improving air quality, low
energy air filters, CRC (Carbon Reduction Commitment), AHUs (Air
Handling Units) and the EPBD, visit the
www.lowenergyairfilter.co.uk
blog and subscribe to the RSS Feed
26