Applications

ASHRAE 52.2 MINIMUM EFFICIENCY REPORTING VALUE (MERV)

APPROXIMATE
AS1324 or ASHRAE. 52.1 RESULTS

APPROXIMATE AS1324 FILTER PERFORMANCE RATING

APPLICATION GUIDELINES

NO. 1
or
DUST SPOT EFFICIENCY

NO. 4
or
ARRESTANCE

TYPICAL CONTROLLED CONTAMINANT

TYPICAL APPLICATION and LIMITATIONS

20

19

18

17

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

U15

H14

H13

H12

< 0.30 um Particle Size
Virus (unattached)
Carbon Dust
Sea Salt
All Combustion Smoke
Radon Progeny

Cleanrooms
Radioactive Materials
Pharmaceutica Manufacturing
Carcinogenic Materials
Orthopaedic Surgery

TYPICAL FILTERS FOR MERV 17 TO 20

H13 / H14 / U15 / U16

ASHRAE 52.2 MINIMUM EFFICIENCY REPORTING VALUE (MERV)

APPROXIMATE
AS1324 or ASHRAE. 52.1 RESULTS

APPROXIMATE AS1324 FILTER PERFORMANCE RATING

APPLICATION GUIDELINES

NO. 1
or
DUST SPOT EFFICIENCY

NO. 4
or
ARRESTANCE

TYPICAL CONTROLLED CONTAMINANT

TYPICAL APPLICATION and LIMITATIONS

16

15

14

13

N/A

>95%

90-95%

80-90%

N/A

N/A

>98%

>98%

H10

F9

F8

F7

0.30 - 1.0 um Particle Size
All Bacteria
Most Tobacco Smoke
Droplet Nuclei (sneeze)
Cooking Oil
Most Smoke
Insecticide Dust
Copier Toner
Most Face Powder
Most Paint Pigments

Hospital Inpatient Care
General Surgery
Smoking Lounges
Superior Commercial Buildings

TYPICAL FILTERS FOR MERV 13 TO 16

Vari+Plus Filters
Vari-Pak Filters
Clean-Pak Filter

ASHRAE 52.2 MINIMUM EFFICIENCY REPORTING VALUE (MERV)

APPROXIMATE
AS1324 or ASHRAE. 52.1 RESULTS

APPROXIMATE AS1324 FILTER PERFORMANCE RATING

APPLICATION GUIDELINES

NO. 1
or
DUST SPOT EFFICIENCY

NO. 4
or
ARRESTANCE

TYPICAL CONTROLLED CONTAMINANT

TYPICAL APPLICATION and LIMITATIONS

12

11

10

9

70-75%

60-65%

50-55%

40-45%

>95%

>95%

>95%

>90%

F6

F6

F5

F5

1.0 - 3.0 um Particle Size
Legionella
Humidifier Dust
Lead Dust
Milled Flour
Coal Dust
Auto Emissions
Nebulizer Drops
Welding Fumes

Superior Residential
Better Commerical Buildings
Hospital Laboratories

TYPICAL FILTERS FOR MERV 9 TO 12

Clean-Pak Filter

ASHRAE 52.2 MINIMUM EFFICIENCY REPORTING VALUE (MERV)

APPROXIMATE
AS1324 or ASHRAE. 52.1 RESULTS

APPROXIMATE AS1324 FILTER PERFORMANCE RATING

APPLICATION GUIDELINES

NO. 1
or
DUST SPOT EFFICIENCY

NO. 4
or
ARRESTANCE

TYPICAL CONTROLLED CONTAMINANT

TYPICAL APPLICATION and LIMITATIONS

8

7

6

5

30-35%

25-30%

<20%

<20%

>90%

>90%

85-90%

80-85%

F4/G4

F4/G4

G3

G3

3.0 - 10.0 um Particle Size
Mold
Spores
Hair Spray
Fabric Protector
Dusting Aids
Cement Dust
Pudding Mix
Snuff
Powdered Milk

Commercial Buildings
Better Residential
Industrial Workplaces
Paint Booth Inlet Air

TYPICAL FILTERS FOR MERV 5 TO 8


ASHRAE 52.2 MINIMUM EFFICIENCY REPORTING VALUE (MERV)

APPROXIMATE
AS1324 or ASHRAE. 52.1 RESULTS

APPROXIMATE AS1324 FILTER PERFORMANCE RATING

APPLICATION GUIDELINES

NO. 1
or
DUST SPOT EFFICIENCY

NO. 4
or
ARRESTANCE

TYPICAL CONTROLLED CONTAMINANT

TYPICAL APPLICATION and LIMITATIONS

4

3

2

1

<20%

<20%

<20%

<20%

75-80%

70-75%

65-70%

<65%

G2

G2

G2

G1

>10.0 um Particle Size
Pollen
Spanish Moss
Dust Mites
Sanding Dust
Spray Paint Dust
Textile Fibers
Carpet Fibers

Minimum Filtration
Residential
Window Air Conditioners

TYPICAL FILTERS FOR MERV 1 TO 4

Service Frame

Notes
1) A MERV for other than HEPA/ULPA filters also includes a test airflow rate, but is not shown here because it has no significance for the purposes of this table. Extract from Table E1, ASHRAE 52.2
2) Filters with a rating of F7 and above, should be pre-filtered with atleast a F4 filter.

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