MERV 3 Air Filters | McMaster-Carr

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Blue

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Reusable

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Air Filter Performance

Low Efficiency

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Removes Particle Size Down To

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Filter Efficiency @ 3 Microns

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6 Products

About Air Filter Efficiency Ratings

Compare MERV rating, efficiency, and particle size to find the right filter for your location—from warehouses and offices to hospitals and labs.

Low-Efficiency Reusable Air Filter Media

Wash and reuse this media to extend the life of expensive filters that catch fine particles. Installed upstream, this affordable media traps debris that can damage or clog your final filter. Cut it to the size you need and attach it to a frame.

Plastic Fiber Pads

Image of Product. Front orientation. Air Filter Media. Low-Efficiency Reusable Air Filter Media, Pads.

Collect high volumes of dust, even in poor weather, such as rain, snow, and wind. This material is also known as hog hair.

	MERV Filter Rating	Max. Temp., ° F	Certification	Pkg. Qty.		Pkg.
1" Thick



	12 × 24	3	180	UL Classified	25	00000000	0000000


	16 × 20	3	180	UL Classified	25	00000000	000000
	20 × 20	3	180	UL Classified	25	00000000	000000
	20 × 25	3	180	UL Classified	25	00000000	000000
	20 × 30	3	180	UL Classified	25	00000000	000000
	24 × 24	3	180	UL Classified	25	00000000	000000