Sub Micron Air Filtration Training Technology - Next Generation Air Filtration

1. Green Filter program
Less Waste
Energy Savings
Labor savings in
cleaning
HAI reduction

2. Program Outline
 Discussion on ASHRAE
standard 52.2.
Understanding of the
filter testing and
MERV rating system.
 Discussion of air
filtration product
types. Identify
products that provide
the greatest value for
the consumer.
 Discussion energy
savings gained from air
filtration

3. Air Filtration testing
 ASHRAE 52.1 – 1992 (old standard)
 ASHRAE 52.2 – 1999 (new standard)
 Dioctylphthalate (DOP) and Poly-alpha olafins (PAO)
 UL 900

4. ASHRAE 52.1
 A design qualification test
 A destructive test to
measure average efficiency,
pressure drop, and dust
holding capacity for low and
medium efficiency filters
 Test aerosol is ASHRAE
standard test dust:
 Size classified Arizona
Road Dust
 Cotton linters
 Carbon black
Initial Resistance
Required to move air
through a filter at a given
linier flow
Written in inches water,
pascals or millimeters
water
Dust holding capacity
 Amount of dust filter
holds at end of test
 Written in grams

5. ASHRAE 52-1
 Arrestance – Using ASHRAE Test Dust
 Percent of dust by weight that filters captures
 If filter holds 60 grams out of 100 fed then the
arrestance is 60%
 Efficiency – Using Outdoor Air
 Percent of staining filter prevents
 Filter 90% efficient captures 90% of the staining
dust from reaching the room

6. (MERV) % % %
1 Aavg < 65 < 20 G1
2 Aavg > 65 < 20
3 Aavg > 70 < 20
4 Aavg > 75 < 20
5 n/a n/a E3 > 20 80 20
6 n/a n/a E3 > 35 85 20-25
7 n/a n/a E3 > 50 90 25-30
8 n/a n/a E3 > 70 92 30-35
9 n/a n/a E3 > 85 95 40-45
10 n/a E2 > 50 E3 > 85 96 50-55
11 n/a E2 > 65 E3 > 85 97 60-65
Average
Dust Spot
Efficiency
Note: The final MERV value is the highest MERV where the filter data
meets all requirements of that MERV.
Average Eff
at 0.4m
F5
G4
G3
G2
ASHRAE Standard 52.2-2007
Composite Average Particle Size
Efficiency, % in Size Range, m
Minimum
Eff
Reporting
Value
ASHRAE 52.1
Average
Arrestance
EN 779
Efficiency
Standards Comparison
12 n/a E2 > 80 E3 > 90 98 70-75 F6
13 n/a E2 > 90 E3 > 90 98 80-85 F7
14 E1 > 75 E2 > 90 E3 > 90 99 90-95 F8
15 E1 > 85 E2 > 90 E3 > 90 99 95 F9
16 E1 > 95 E2 > 95 E3 > 95 100 99 H10
Range 1 Range 2 Range 3
0.30 - 1.0
n/a
1.0 - 3.0
n/a
3.0 - 10.0
E3 < 20
n/a n/a E3 < 20
n/a n/a E3 < 20
n/a n/a E3 < 20
ASHRAE 52-1 is no
longer used
ASHRAE 52-2 is the
new air filtration
standard

7.  Addendum B Published (Sept 2008)
 Non-Mandatory Appendix – Appendix J
has been added
 SPECIFIABLE value –
MERV-A
 The filter should be
tested per ASHRAE 52.2
(including Appendix J)
 The resulting MERV-A
must have the same (or
higher) numerical value
when compared to the
MERV value.
 Dust Holding Capacity was added
 Dust Weight Arrestance was added
ASHRAE 52.2
ASHRAE 52.2

8. ASHRAE 52.2 Standard
 A design qualification test
 A destructive test to
measure minimum
efficiency (MERV)
 Efficiency test aerosol is
Potassium Chloride (KCl)
particles, 0.1 to 10 micron
 Dust loading aerosol is
ASHRAE Standard Test
Dust
 Initial Resistance - Pressure
required to move air through
filter at a certain air flow
written in inches water,
pascals or millimeters water
 Final Resistance - Pressure at
which the filter would be
considered fully loaded

9. Exhaust
Room Air
Outlet
Filters
ASME
Nozzle Downstream Mixer
Blower Flow
Control
Valve
Inlet
Filters
Aerosol
Generator
Upstream
Mixer
OPC
Device
Section
Backup Filter
Holder (Used
When Dust loading)
Test Duct Configuration

10. Minimum Efficiency
Reporting Value: MERV 6 @500FPM
Composite Average Efficiency:
Size
Range
(microns)
Fractional Efficiency (%) @ P (“W.G.)
Composite
Minimums
0.285 0.320 0.464 0.643 0.822 1.000
0.3-0.4 2.7 6.7 17.2 29.4 37.1 37.9 2.7
0.4-0.55 7.8 15.9 27.7 43.3 53.2 54.6 7.8
0.55-0.7 11.2 30.2 46.0 60.7 70.5 71.6 11.2
0.7-1.0 17.6 42.6 59.3 73.7 81.3 81.8 17.6
1.0-1.3 20.4 51.6 70.3 80.8 83.7 85.2 20.4
1.3-1.6 23.9 58.2 76.5 84.7 86.1 87.2 23.9
1.6-2.2 28.3 69.9 84.1 89.1 90.2 91.0 28.3
2.2-3.0 36.3 83.9 91.9 94.2 94.4 93.2 36.3
3.0-4.0 39.4 89.4 93.7 95.8 96.4 94.9 39.4
4.0-5.5 42.8 90.6 95.3 96.5 97.9 95.6 42.8
5.5-7.0 46.5 92.3 97.1 98.0 98.4 97.9 46.5
7.0-10.0 50.4 94.8 97.5 98.3 100.0 99.2 50.4
Initial 0.3 to 1.0
Micron
1.0 to 3.0
Micron
3.0 to 10.0
Micron
E1 = 9.8 E2 = 27.2 E3 = 44.8
TYPICAL 52.2 COMPLETE LOADING TEST DATA

11. ASHRAE 52.2
 Minimum Efficiency Reported Value (MERV) Efficiency
by particle size reported as one number – 1 to 16
52.1 Equivalent
100
90
80
70
60
50
40
30
20
10
0
0.30
0.35
0.47
0.62
0.84
1.14
1.44
1.88
2.57
3.46
4.69
6.2
8.37
10
Efficiency,%
95%
85%
65%
25%
Not to exact scale, representation only

12. ASHRAE 52.2 “Appendix J”
 Incorporates a conditioning step using KCL.
 Eliminates static charges on media that typically
dissipates quickly in service.
 Results in a MERV-A rating

13. HEPA Filter Tests
 A non-destructive penetration test
 Aerosolized dioctylphthalate (DOP) - or
polyalphaolephins (PAO)
 Instrument measures overall intensity of light
scattered by aerosol both upstream and
downstream
 Polystyrene latex spheres (PSL) – fractional
efficiency measured with particle counter

14. Cost of Energy
World events have
impact on the global
cost of oil
Energy cost drive
economic decisions
for most everyone

15. Life Cycle-costs
 Investment – capital cost of
filters, frames, installation
 PCenergy – present total cost of
power
 PCmaintenance – present total
cost of maintenance including
filter replacement, etc.
 PCcleaning – present cost of
duct cleaning
 PCdisposal – present total
cost for removal and
disposal of the used filters
22%
44%
11%
23%
Energy Utilization in a
Standard Building
Cooling
Ventilation
Lights
Plugs

16. Energy Savings
 SFC filter cost per square foot of
media is less than a MERV 13 filter.
ASHRAE requires MERV 14 filters in
hospitals
 Labor cost slightly higher
 Disposal cost slightly lower
 Energy costs savings reduced
 Cleaning savings significant
 HAI reduction significant
15%
5%
2%
8%
70%
Standard Building Cost Air
Filtration
Filter
Cost
Labor
Cost
Disposal
Cost
Cleaning
Cost
As a rule of thumb- “A reduction of .1” WG. saves $25-$40 per opening per year in energy.” Standard MERV 14
filters have .5 to .7 initial static pressure. Sanders Filter starts at .2.

17. Green Filter program
• Less Waste
• Energy
Savings
• Labor savings
in cleaning
• HAI reduction