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E-1 Application Chart
Table E-1 (ASHRAE 52.2-1999) Application Guidelines

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Application Guidelines

Std. 52.2 Minimum Efficiency Reporting
Value (MERV)
Approx. Std.
52.1 results
Typical controlled contaminant   Typical applications and limitations   Typical air filter/cleaner



20

N/A

N/A

<0.30µm * particle size virus
(unattached)

Carbon dust

Sea salt

All combustion smoke,
and Radon progeny
 
Clean rooms,

Radioactive materials

Pharmaceutical
manufacturing

Carcinogenic materials,
and orthopaedic
surgery
  HEPA/ULPA Filters

>99.999% efficiency on 0.10-0.20µm particles, IEST Type F
19 N/A N/A >99.999% efficiency on 0.30µm particles, IEST Type D
18 N/A N/A >99.999% efficiency on 0.30µm particles, IEST Type C
17 N/A N/A >99.97% efficiency on 0.30µm particles, IEST Type A
 

16

N/A

N/A

0.30 – 1.0µm 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
 
HEPA/ULPA Filters

>99.999% efficiency on 0.10-0.20µm particles, IEST Type F>

99.999% efficiency on 0.30µm particles, IEST Type D>

99.999% efficiency on 0.30µm particles, IEST Type C>

99.97% efficiency on 0.30µm particles, IEST Type A
15 >95% N/A
14 90- 95% >98%
13 80- 90% >98%
 

12

70- 75%

>95%


1.0-3.0µm particles size

Legionella

Humidifier dust

Lead dust

Milled flour

Coal dust

Auto emissions

Nebulizer drops

Welding fumes
 


Superior residential;

Better commercial buildings

Hospital laboratories
 
Bag Filters

Non-supported (flexible) micro fine fibreglass or synthetic media. 300-900 mm (12-36 inches) deep, 6 to 12 pockets.

Box filters

Rigid style filters 150 to 300 mm (6 to 12 inches) deep may use lofted (air laid) or paper (wet laid) media.
11 60- 65% >95%
10 50- 55% >95%
9 40- 45% >90%
 

8

30- 35%

>90%


3.0-10µm particles size

Mould

Spores

Hair spray

Fabric protector

Dusting aids

Cement Dust

Pudding mix

Snuff

Powdered milk

 

 


Commercial Buildings

Better residential

Industrial workplaces

Paint booth inlet air
 
Pleated filters

Disposable, extended surface, 25 to 125 mm (1 to 5 inches) thick with cotton-polyester blend media, cardboard frame

Cartridge filters

Graded density viscous coated cube or pocket filters synthetic media

Throwaway

Disposable synthetic media panel filters
7 25- 30% >90%
6 <20% 85- 90%
5 <20% 80- 85%
 

4

<20%

75- 80%


3.0-10µm particles size

Mould

Spores

Hair spray

Fabric protector

Dusting aids

Cement Dust

Pudding mix

Snuff

Powdered milk

 

 


Commercial Buildings

Better residential

Industrial workplaces

Paint booth inlet air
 
Pleated filters

Disposable, extended surface, 25 to 125 mm (1 to 5 inches) thick with cotton-polyester blend media, cardboard frame

Cartridge filters

Graded density viscous coated cube or pocket filters synthetic media

Throwaway

Disposable synthetic media panel filters
3 <20% 70- 75%
2 <20% 65- 70%
1 <20% <65%
 


Note: A MERV for filters other than HEPA/ULPA also includes a test airflow rate, but it is not shown here because it has no significance for the purposes of this table.

* µm is the symbol for micrometers, commonly known as microns,

Note: Conclusive evidence in studies found that common MERV 1-4 filters do little to prevent particulate accumulation on air-pathway components (coils, vanes, heating surfaces).


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