Custom Air Filters | McMaster-Carr

Filter by

Thickness

Frame Material

Material

Polyester/Polyethylene

Width

Length

Reusable

For Removing

Filter Area

Performance

MERV Filter Rating

Maximum Temperature

Filtering Method

Construction

Removes Particle Size Down To

Application

RoHS

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

Yes

REACH

Compliant

Export Control Classification Number (ECCN)

EAR99

Air Filter Performance

Low Efficiency

Medium Efficiency

DFARS Specialty Metals

Exempt

Filter Efficiency @ 3 Microns

Filter Efficiency

42 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

Pair with a more efficient filter to extend its life

10 products

Medium Efficiency

Remove large dust and debris from the air

32 products

Application

Final Filtering

Install alone or downstream of a prefilter

32 products

Performance

Long Life

Extend time between filter changes

10 products

Made-to-Order Long-Life Reusable Mesh Panel Air Filters

If you need a long-life reusable filter with unique dimensions, we’ll get it made. These last longer than standard reusable filters thanks to a thicker frame and additional mesh layers. The frame also stands up to high airflow without warping. When your filter gets dirty, just wash and reuse it.

How to order:

Calculate the filter area you need by multiplying your filter length × width.
Find the thickness and filter area range you need.
Select the corresponding part number and enter your length and width.

For filters larger than 599 square inches, select 2150K999. Then enter the thickness, length, and width you need.

If you need help, feel free to call or email us. We answer our phones 24/7 within three rings.

	MERV Filter Rating	Frame Ga.	Max. Temp., ° F	Specs. Met		Each
1/2" Thick



	1 to 299	4	18	240	UL 900	2150K91	000000


	300 to 599	4	18	240	UL 900	2150K92	00000


	1" Thick



			1 to 299	4	18	240	UL 900	2150K93	00000


			300 to 599	4	18	240	UL 900	2150K94	00000


			2" Thick



					1 to 299	4	18	240	UL 900	2150K95	00000


					300 to 599	4	18	240	UL 900	2150K96	00000


					3" Thick



							1 to 299	4	18	250	UL 900	2150K75	00000


							300 to 599	4	18	250	UL 900	2150K81	000000


							4" Thick



									1 to 299	4	18	250	UL 900	2150K68	000000


									300 to 599	4	18	250	UL 900	2150K69	000000

Made-to-Order Pleated Panel Air Filters

If you need a pleated panel filter with unique dimensions, we’ll get it made. These are the most common type of HVAC replacement filters. The pleats collect more dust than flat panels without blocking airflow. The cardboard frame is treated to resist humidity. The galvanized steel grill prevents sagging.

How to order:

Calculate the filter area you need by multiplying your filter length × width.
Find the thickness and filter area range you need.
Select the corresponding part number and enter your length and width.

For filters larger than 23" × 30", select 3923T999. Then enter the thickness, length, and width you need.

If you need help, feel free to call or email us. We answer our phones 24/7 within three rings.

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



	36 to 149	8	180	UL 900	12	3923T41	0000000


	150 to 199	8	180	UL 900	12	3923T47	000000
	200 to 249	8	180	UL 900	12	3923T48	000000
	250 to 299	8	180	UL 900	12	3923T42	000000
	300 to 399	8	180	UL 900	12	3923T43	000000
	400 to 499	8	180	UL 900	12	3923T44	000000
	500 to 599	8	180	UL 900	12	3923T45	000000
	600 to 690	8	180	UL 900	12	3923T46	000000


	2" Thick



			36 to 149	8	180	UL 900	12	3923T51	000000


			150 to 199	8	180	UL 900	12	3923T57	000000
			200 to 249	8	180	UL 900	12	3923T58	000000
			250 to 299	8	180	UL 900	12	3923T52	000000
			300 to 399	8	180	UL 900	12	3923T53	000000
			400 to 499	8	180	UL 900	12	3923T54	000000
			500 to 599	8	180	UL 900	12	3923T55	000000
			600 to 690	8	180	UL 900	12	3923T56	000000

Made-to-Order Panel Air Filters

If you need a panel air filter with unique dimensions, we’ll get it made. Typically used as replacements in HVAC equipment, these panels work as standalone filters or as prefilters to your main filter. They’re an affordable choice for protecting expensive filters that catch fine particles.

How to order:

Calculate the filter area you need by multiplying your filter length × width.
Find the thickness and filter area range you need.
Select the corresponding part number and enter your length and width.

For filters larger than 23" × 30", select 3884T999. Then enter the thickness, length, and width you need.

If you need help, feel free to call or email us. We answer our phones 24/7 within three rings.

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



	16 to 149	5	180	UL Classified	12	3884T11	000000


	150 to 199	5	180	UL Classified	12	3884T13	00000
	200 to 249	5	180	UL Classified	12	3884T15	000000
	250 to 299	5	180	UL Classified	12	3884T17	000000
	300 to 399	5	180	UL Classified	12	3884T21	000000
	400 to 499	5	180	UL Classified	12	3884T22	000000
	500 to 599	5	180	UL Classified	12	3884T23	000000
	600 to 690	5	180	UL Classified	12	3884T25	000000


	2" Thick



			16 to 149	5	180	UL Classified	12	3884T34	00000


			150 to 199	5	180	UL Classified	12	3884T36	000000
			200 to 249	5	180	UL Classified	12	3884T38	000000
			250 to 299	5	180	UL Classified	12	3884T42	000000
			300 to 399	5	180	UL Classified	12	3884T44	000000
			400 to 499	5	180	UL Classified	12	3884T46	000000
			500 to 599	5	180	UL Classified	12	3884T48	000000
			600 to 690	5	180	UL Classified	12	3884T53	000000