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Air filters for all types of Heating, Ventilation and Air Conditioning (HVAC) systems. High purity products for Gas Turbines, Paint Spray Booths, cleanrooms, bio-safety and clean benches.

World leading spray booths by GFS in the USA

AIR FILTERS TECHNICAL SECTION - Technical Issues

WORLDWIDE AIR FILTER TEST METHOD COMPARISON CHART

Newest USA Particle Size Test	In Approximation with older test standard		Regular USA Dust Spot Test		European Version Pf Regular Dust Spot Test		Proposed New European Particle Size Test		BS 3928 High Efficiency Particulate Air Filters Initial Efficiency A (Test Aerosol: NaCl)
ASHRAE 52.2-1999 Std. 52.2 Minimum Efficiency Reporting Value (MERV) (Test Aerosol: KCL)	ASHRAE 52.1 - 1992		ASHRAE 52.1 – 1992		DIN EN779 – 1993		CEN EN779 – 2002
	Average Dust Spot Efficiency @450Pa	Average Arrestance @250Pa	Average Dust Spot Efficiency @450Pa	Average Arrestance @250Pa	Average Dust Spot Efficiency @450Pa	Average Arrestance @250Pa	Average Efficiency of only 0.4µm particles @450Pa (Test Aerosol: DEHS)	Average Arrestance @250Pa
Micron Size 0.3-10.0 µm	Ea>20%	Ea <20%	Ea>20%	Ea <20%	Ea>20%	Ea <20%	Micron size 0.4µm		Micron size 0.3 (0.6) µm

MERV 20	NA	NA							EU 14 (A>99.999%)
MERV 19	NA	NA							EU 13 (A>99.99%)
MERV 18	NA	NA							EU 12 (A>99.97%)
MERV 17	NA	NA							EU 11 (A>99.9%)
MERV 16	NA	NA							EU 10 (A>95%)
MERV 15	> 95%	NA	> 95%		F9 (> 95%)		F9 (> 95%)
MERV 14	90 – 95%	> 98%	90 – 95%		F8 (90 - 95%)		F8 (90 - 95%)
MERV 13	80 – 90%	> 98%	80 – 90%		F7 (80 – 90%)		F7 (80 – 90%)
MERV 12	70 – 75%	> 95%	60 – 80%		F6 (60 – 80%)		F6 (60 – 80%)
MERV 11	60 – 65%	> 95%
MERV 10	50 – 55%	> 95%	40 – 60%		F5 (40 – 60%)		F5 (40 – 60%)
MERV 9	40 – 45%	> 90%
MERV 8	30 – 35%	> 90%		> 90%		G4 (> 90%)		G4 (> 90%)
MERV 7	25 – 30%	>90%
MERV 6	<20%	85 – 90%		80 – 90%		G3 (80 – 90%)		G3 (80 – 90%)
MERV 5	<20%	80 – 85%
MERV 4	<20%	75 – 80%		65 – 80%		G2 (65 – 80%)		G2 (65 – 80%)
MERV 3	<20%	70 – 75%
MERV 2	<20%	65 – 70%
MERV 1	<20%	< 65%		< 65%		G1 (< 65%)		G1 (< 65%)

If you have any questions or queries relating to the content of this page or any technical questions relating to air filters, spray booths, Peregrine Industries, Filtrair, Filtration Group or GFS or any product on this site, please contact us through our contacts page

Download Air Filter Test Method Comparison Chart in pdf format

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Last Updated: December 21, 2011