25 × 48 Filters | McMaster-Carr

Filter by

Color

Blue

White

System of Measurement

Inch

Thickness

1/2"

HVAC Filter Trade Size

For Removing

Reusable

Construction

Form

Material

MERV Filter Rating

Surface Treatment

Filter Efficiency @ 3 Microns

Application

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

Filtering Method

Maximum Temperature

REACH

RoHS

Sold As

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Air Filter Performance

Length

Width

For Use With

Filter Efficiency

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.

Air Filter Performance

Low Efficiency

Extend the life of expensive filters that catch fine particles

2 products

Medium Efficiency

Remove large dust and debris from the air

4 products

Performance

Reusable

Filter, rinse, repeat

4 products

Reusable Air Filter Media

Wash and reuse this media, which collects large dust and debris in your HVAC system. This filter media is rigid enough to be used without a frame. Just cut it to the size you need.

Pads

					Pkg. of 1		Pkg. of 5
	HVAC Filter Trade Size	MERV Filter Rating	Max. Temp., ° F	Specs. Met		Pkg.		Pkg.
1/2" Thick



		25 × 48	5	225	UL 900	21205K22	000000	21205K28	0000000


		1" Thick



				25 × 48	6	225	UL 900	21205K12	00000	21205K41	000000

Low-Efficiency Air Filter Media

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 this media to the size you need and attach it to a frame.

Pads

	MERV Filter Rating	Max. Temp., ° F	Certification	Pkg. Qty.		Pkg.
1/2" Thick



	25 × 48	Not Rated	220	UL Classified	1	2182K71	000000


	1" Thick



			25 × 48	Not Rated	220	UL Classified	1	2182K72	00000