20 × 24 Air Filters | McMaster-Carr

The most common HVAC replacement filters. Pleats create a large surface area to filter without reducing airflow. The cardboard frame is treated to resist humidity. The galvanized steel grill prevents sagging.

Don’t see the size you need? Additional sizes are available here.

					Small Pack			Large Pack
	HVAC Filter Trade Size	MERV Filter Rating	Max. Temp., ° F	Specs. Met	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
1" Thick



		20 × 24	8	180	UL 900	2	00000000	000000	12	00000000	000000


		2" Thick



				20 × 24	8	180	UL 900	2	00000000	00000	12	00000000	00000


				4" Thick



						20 × 24	8	180	UL 900	2	00000000	00000	6	00000000	00000

High-Efficiency Pleated Panel Air Filters

Trap common allergens such as dander, mold spores, and pollen. These filters balance filtration efficiency and airflow, making them more cost-effective than higher-rated filters.

					Small Pack			Large Pack
	HVAC Filter Trade Size	MERV Filter Rating	Max. Temp., ° F	Specs. Met	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
1" Thick



		20 × 24	11	150	UL 900	2	0000000	000000	12	000000	0000000


		2" Thick



				20 × 24	11	150	UL 900	2	0000000	00000	12	0000000	000000


				4" Thick



						20 × 24	11	150	UL 900	2	0000000	00000	6	0000000	000000

Ultra-Efficiency Pleated Panel Air Filters

Capture more viruses and finer allergens than high-efficiency filters—these ultra-efficiency filters can even remove contaminants from wildfire smoke and pollution. They have pleats that create a large surface area for filtering without reducing airflow. The cardboard frame is treated to resist humidity, and the galvanized steel grill prevents sagging.

While these ultra-efficiency filters may make your HVAC system work harder than lower efficiency filters, they’re still easier on your equipment than HEPA filters.

					Small Pack			Large Pack
	HVAC Filter Trade Size	MERV Filter Rating	Max. Temp., ° F	Specs. Met	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
1" Thick



		20 × 24	13	150	UL 900	2	00000000	000000	12	00000000	0000000


		2" Thick



				20 × 24	13	150	UL 900	2	00000000	00000	12	00000000	000000


				4" Thick



						20 × 24	13	150	UL 900	2	00000000	00000	6	00000000	000000

Long-Life Reusable Mesh Panel Air Filters

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.

Don’t see the size you need? Additional sizes are available here.

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



	20 × 24	4	18	240	UL 900	0000000	000000


	2" Thick



			20 × 24	4	18	240	UL 900	0000000	00000

Panel Air Filters

Typically used as replacements in HVAC equipment, these panels work as standalone filters or as prefilters to your main filter. They are an affordable choice for protecting expensive filters that catch fine particles.

Don’t see the size you need? Additional sizes are available here.

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



	20 × 24	5	180	UL Classified	12	00000000	000000


	2" Thick



			20 × 24	5	180	UL Classified	12	0000000	00000

High-Efficiency Pocket Air Filters

Deep pockets maximize filtering surface area with minimal airflow resistance. These filters catch common allergens such as dander, mold spores, and pollen. High-efficiency filters balance filtration efficiency and airflow, making them more cost-effective than higher-rated filters.

	MERV Filter Rating	Max. Temp., ° F		Each
15" Deep



	20 × 24	10	175	000000000	000000


	20 × 24	12	175	000000000	00000


	22" Deep



			20 × 24	10	175	00000000	00000


			20 × 24	12	175	00000000	00000


			30" Deep



					20 × 24	10	175	000000000	00000


					20 × 24	12	175	000000000	00000

Reusable Mesh Panel Air Filters

Filter, rinse, and repeat. When your filter gets dirty, just wash and reuse it.

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



	20 × 24	Not Rated	24	240	UL 900	0000000	000000

Odor-Removing Pleated Panel Air Filters

Carbon granules absorb odors. Pleats create a large surface area to filter without reducing airflow. The cardboard frame won't warp because it is treated to resist humidity.

Strong Odor Removing—Packed with 15 times more carbon than standard odor-removal air filters to eliminate heavy odors.

	Max. Temp., ° F	Specs. Met		Each
Odor-Removing Air Filters







	1" Thick

	20 × 24	7	20	140	—	00000000	000000




			2" Thick

			20 × 24	7	20	140	—	00000000	00000




					4" Thick

					20 × 24	7	20	140	—	00000000	00000


					Strong-Odor-Removing Air Filters







									2" Thick

									20 × 24	7	300	120	UL 900	0000000	00000

Long-Life High-Efficiency Pleated Panel Air Filters

Tight pleats create a larger surface area than standard pleats for a longer life. These filters trap common allergens such as dander, mold spores, and pollen. High-efficiency filters also balance filtration efficiency and airflow, making them more cost-effective than higher-rated filters. Use them in data centers and other locations that require extra-clean air.

	MERV Filter Rating	Max. Temp., ° F		Each
2" Thick



	20 × 24	11	175	0000000	000000


	4" Thick



			20 × 24	11	175	0000000	00000

Cube Air Filters

Stop dirty air from leaking around the edges of your filter. These filters are self-sealing thanks to the filter material that fully encloses the metal frame. This design also means you don't need separate mounting hardware. These filters also last longer than standard pleated filters because their large surface area traps more particles.

	MERV Filter Rating	Max. Temp., ° F	Specs. Met		Each
10" Deep



	20 × 24	8	180	UL 900	0000000	000000


	15" Deep



			20 × 24	8	180	UL 900	0000000	00000


			20" Deep



					20 × 24	8	180	UL 900	0000000	00000

Ultra-Efficiency Pocket Air Filters

Capture more viruses and finer allergens than high-efficiency pocket air filters. The deep pockets maximize filtering surface area with minimal airflow resistance.

	MERV Filter Rating	Max. Temp., ° F		Each
15" Deep



	20 × 24	14	175	000000000	000000


	20 × 24	15	175	000000000	00000


	22" Deep



			20 × 24	14	175	000000000	00000


			20 × 24	15	175	00000000	00000


			30" Deep



					20 × 24	15	175	000000000	00000

Long-Life Ultra-Efficiency Box Air Filters


4 Panels	8 Panels

Multiple panels maximize filtering surface area for long service life. These ultra-efficiency air filters capture viruses, fine allergens, and even wildfire smoke and heavy pollution. They have a V-shape design and a rigid frame that withstands fluctuations in airflow, such as those created by variable air volume systems. The more filter panels they have, the more filtering surface they have for a longer service life.

				4 Panels		8 Panels
	HVAC Filter Trade Size	MERV Filter Rating	Max. Temp., ° F		Each		Each
12" Thick



		20 × 24	14	180	0000000	0000000	0000000	0000000

Electrostatic Reusable Panel Air Filters

An inherent electrostatic charge attracts dust and particles to these filters. They can be washed and reused.

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



	20 × 24	6	180	UL 900	0000000	000000

Easy-Install Electrostatic Reusable Panel Air Filters

Magnetic strips on the back of the frame make these filters easy to install and remove. Because you don’t need to disassemble equipment to remove them, they are often used as prefilters on steel air intake louvers, metal cabinets, and metal grid systems. Made of polypropylene, an inherent electrostatic charge attracts dust and particles to these filters. They can be washed and reused.

	MERV Filter Rating	Frame Ga.	Max. Temp., ° F	Specs. Met		Each
3/8" Thick



	20 × 24	Not Rated	26	180	UL 900	0000000	0000000

High-Efficiency Box Air Filters

Breathe easier with filters that trap common allergens, such as dander, mold spores, and pollen. They're also designed to handle airflow fluctuations, like those in variable air volume systems. Often used in data centers and other environments needing extra-clean air, these filters balance efficiency and airflow—making them more cost-effective than higher-rated options.

	MERV Filter Rating	Max. Temp., ° F	Specs. Met		Each
6" Thick



	20 × 24	11	180	UL 900	0000000	0000000


	12" Thick



			20 × 24	11	180	UL 900	0000000	000000

Mildew-Resistant Pleated Panel Air Filters

An antimicrobial compound inhibits mildew and mold from growing on your filter. Pleats create a large surface area for filtering without reducing airflow.

Cannot Be Sold To—Product registration requirements restrict sales to the listed areas.

						Pkg. of 1		Pkg. of 12
	HVAC Filter Trade Size	MERV Filter Rating	Cannot Be Sold To	Max. Temp., ° F	Specs. Met		Pkg.		Pkg.
2" Thick



		20 × 24	8	Canada	150	UL 900	00000000	000000	00000000	0000000

Ultra-Efficiency Odor-Removing Pleated Panel Air Filters

Clear the air of fine particles and odors caused by high levels of pollution, such as wildfire smoke. These filters contain carbon granules to absorb odors. Pleats create a large surface area to filter without reducing airflow.

	MERV Filter Rating	Carbon Concentration, g/ft²	Max. Temp., ° F	Specs. Met		Each
2" Thick



	20 × 24	13	18	180	UL 900	0000000	0000000

Ultra-Efficiency Box Air Filters

Capture viruses, fine allergens, and even wildfire smoke and heavy pollution with filters built to withstand airflow fluctuations, like those in variable air volume systems. While these ultra-efficiency filters may make your HVAC system work harder than lower efficiency filters, they’re still easier on your equipment than HEPA filters.

	MERV Filter Rating	Max. Temp., ° F	Specs. Met		Each
6" Thick



	20 × 24	14	180	UL 900	0000000	0000000


	12" Thick



			20 × 24	14	180	UL 900	0000000	000000

Panel Air Filter Frames


	Replacement Clip

Hold panel filters in place. The frames can be welded together to hold multiple filters. The trade size is the actual size of the frame.

	Frames							Replacement Clips
	For HVAC Filter Trade Size	Frame Material	Frame Ga.	Mounting Hardware Included	Includes		Each	Pkg. Qty.		Pkg.
For 2" Thick Filters



		20 × 24	Galvanized Steel	16	Yes	Retaining Clips, Sealing Gasket	00000000	000000	2	00000000	00000

Clips