12 × 18 Filters | McMaster-Carr

Filter by

HVAC Filter Trade Size

System of Measurement

Inch

Thickness

MERV Filter Rating

Filter Type

Frame Material

Depth

For Removing

REACH

Filter Efficiency

Removes Particle Size Down To

For Use With

Material

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

Yes

RoHS

Compliant

Reusable

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

Application

Filtering Method

Filter Efficiency @ 3 Microns

20%

73%

95%

Air Filter Performance

Maximum Temperature

Finish

Support Grill Material

Steel

Filter Efficiency @ 1 Microns

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.

Filter Type

Panel

Install as standalone filters or as prefilters

5 products

Bag

Trap more dust and last longer than panel filters

1 product

Air Filter Performance

Medium Efficiency

Remove large dust and debris from the air

5 products

Ultra Efficiency

Trap viruses, smoke, and fine allergens

1 product

Pleated Panel Air Filters

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.

					Pkg. of 2		Pkg. of 12
	HVAC Filter Trade Size	MERV Filter Rating	Max. Temp., ° F	Specs. Met		Pkg.		Pkg.
1" Thick



		12 × 18	8	180	UL 900	2209K175	000000	2209K176	0000000


		2" Thick



				12 × 18	8	180	UL 900	2209K256	00000	2209K257	000000

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
21" Deep



	12 × 18	15	175	22905K715	000000

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



	12 × 18	5	180	UL Classified	12	2063K463	000000