12 × 12 Filters | McMaster-Carr

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REACH Compliant

	Air Filter Performance Air Filter Performance

Prefilter

High-Efficiency Air Filter
(HEPA)

	Filter Efficiency @ 3 Microns Filter Efficiency @ 3 Microns

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46 Products

About Air Filter Efficiency Ratings

The pleats create a large surface area for filtering without reducing airflow. These filters are typically used as replacement filters in HVAC equipment. The cardboard frame is treated to resist humidity, and the galvanized steel grill prevents sagging.

These filters meet UL 900 flame retardance requirements. Actual size is up to 5/8” less than trade size.

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

For technical drawings and 3-D models, click on a part number.

1" Thick

		Filter Efficiency @
Trade Size	MERV Filter Rating	1 Micron	3 Microns	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temp., °F		Pkg.
Pkg. of 2
12 × 12	9	35%	75%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000
Pkg. of 12
12 × 12	9	35%	75%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	00000

2" Thick

		Filter Efficiency @
Trade Size	MERV Filter Rating	1 Micron	3 Microns	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temp., °F		Pkg.
Pkg. of 2
12 × 12	9	35%	75%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000
Pkg. of 12
12 × 12	9	35%	75%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	00000

Panel Air Filters

These filters are typically used as replacements in HVAC equipment.

All meet UL Classified flame retardance requirements. Actual size is up to 5/8” less than trade size.

Prefilters can be used as a standalone filter or a prefilter that guards your main filter. They’re an economical choice for protecting expensive filters that catch fine particles.

For technical drawings and 3-D models, click on a part number.

Prefilters
Trade Size	MERV Filter Rating	Filter Efficiency @ 3 Microns	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temp., °F	Pkg. Qty.		Pkg.
1/2" Thick
12 × 12	5	20%	3	Fiberglass	Cardboard	180°	12	00000000	000000
1" Thick
12 × 12	5	20%	3	Fiberglass	Cardboard	180°	12	00000000	00000
2" Thick
12 × 12	5	20%	3	Fiberglass	Cardboard	180°	12	00000000	00000

Heavy Duty Reusable Metal Panel Filters

With a frame made of a thick gauge metal, these filters are durable. They can be washed and reused. Also known as metal mesh filters.

All meet UL 900 flame retardance requirements. Actual size is up to 1/2" less than trade size.

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

For technical drawings and 3-D models, click on a part number.

1/2" Thick
Trade Size	MERV Filter Rating	Removes Particle Size Down To, microns	Material	Frame Gauge	Max. Temperature, °F		Each
12 × 12	4	10	Aluminum	18	240°	0000000	000000
1" Thick
12 × 12	4	10	Aluminum	18	240°	0000000	00000

Reusable Metal Panel Filters

Also known as metal mesh filters. These filters can be washed and reused.

These filters meet UL 900 flame retardance requirements. Actual size is up to 1/2" less than trade size.

For technical drawings and 3-D models, click on a part number.

1" Thick
Trade Size	Material	Frame Gauge	Max. Temperature, °F		Each
12 × 12	Aluminum	24	240°	0000000	000000

Reusable Electrostatic Panel Air Filters

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

These filters meet UL 900 flame retardance requirements. Actual size is up to 1/2" less than trade size.

For technical drawings and 3-D models, click on a part number.

1" Thick
Trade Size	MERV Filter Rating	Filter Efficiency @ 3 Microns	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temperature, °F		Each
12 × 12	6	35%	3	Polypropylene Plastic/Polyester Plastic Blend	Galvanized Steel	180°	0000000	000000

High-Efficiency Panel Air Filters

Rated MERV 11, these filters capture particles down to 1 micron. Use in data centers and other locations that require extra-clean air. These filters 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.

These filters meet UL 900 flame retardance requirements. Actual size is up to 5/8" less than trade size.

For technical drawings and 3-D models, click on a part number.

1" Thick

		Filter Efficiency @
Trade Size	MERV Filter Rating	0.3 Microns	1 Micron	3 Microns	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temperature, °F		Pkg.
Pkg. of 2
12 × 12	11	20%	65%	85%	1	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000
Pkg. of 12
12 × 12	11	20%	65%	85%	1	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000

2" Thick

		Filter Efficiency @
Trade Size	MERV Filter Rating	0.3 Microns	1 Micron	3 Microns	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temp., °F		Pkg.
Pkg. of 2
12 × 12	11	20%	65%	85%	1	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000
Pkg. of 12
12 × 12	11	20%	65%	85%	1	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000

Ultra-Efficiency Panel Air Filters

Rated MERV 13, these filters capture particles down to 0.3 microns. Use in data centers, hospitals, and other locations that require extra-clean air. These filters 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.

Filters meet UL 900 flame retardance requirements. Actual size is up to 5/8" less than trade size.

For technical drawings and 3-D models, click on a part number.

1" Thick

		Filter Efficiency @
Trade Size	MERV Filter Rating	0.3 Microns	1 Micron	3 Microns	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temp., °F		Pkg.
Pkg. of 2
12 × 12	13	50%	85%	90%	0.3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000
Pkg. of 12
12 × 12	13	50%	85%	90%	0.3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000

2" Thick

		Filter Efficiency @
Trade Size	MERV Filter Rating	0.3 Microns	1 Micron	3 Microns	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temp., °F		Pkg.
Pkg. of 2
12 × 12	13	50%	85%	90%	0.3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000
Pkg. of 12
12 × 12	13	50%	85%	90%	0.3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	00000000	000000

Frames for Panel Air Filters

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.

Add clips to attach frames to 1" or 4" filters.

For technical drawings and 3-D models, click on a part number.

Frames

Frame

Replacement Retaining Clip

Frames								Replacement Retaining Clips
Trade Size	For Filter Thick.	Frame Material	Frame Gauge	Mounting Hardware Included	Includes		Each	Pkg. Qty.		Pkg.
12 × 12	2"	Galvanized Steel	16	Yes	Retaining Clips, Sealing Gasket	00000000	000000	2	00000000	00000

Optional Clips

Optional Clip

For Filter Thickness	Material	Pkg. Qty.		Pkg.
1"	Galvanized Steel	2	00000000	00000
4"	Galvanized Steel	2	00000000	0000

Air Filter Pads

Cut these pads to the size you need; frames are sold separately.

All meet UL Classified flame retardance requirements.

Pads with a tacky surface retain particles better than other pads. They are blue on one side and white on the other.

1/2" Thick
Trade Size	Material	Surface Treatment	Color	Max. Temperature, °F	Pkg. Qty.		Pkg.
12 × 12	Polyester Plastic	Tacky	Blue, White	220°	10	0000000	000000
1" Thick
12 × 12	Polyester Plastic	Tacky	Blue, White	220°	10	0000000	00000
2" Thick
12 × 12	Polyester Plastic	__	White	220°	10	0000000	00000

Prefilter Air Filter Pads

These pads are an economical choice for protecting more expensive filters that catch finer particles. Cut to the size you need; frames are sold separately.

Pads meet UL 900 flame retardance requirements.

Pkg. of 6
Trade Size	MERV Filter Rating	Filter Efficiency @ 3 Microns	Removes Particle Size Down To, microns	Material	Color	Max. Temperature, °F		Pkg.
1" Thick
12 × 12	6	35%	3	Fiberglass	White	250°	00000000	000000
2" Thick
12 × 12	6	35%	3	Fiberglass	White	250°	00000000	00000
Pkg. of 50
1" Thick
12 × 12	6	35%	3	Fiberglass	White	250°	00000000	000000
2" Thick
12 × 12	6	35%	3	Fiberglass	White	250°	00000000	000000

Mildew-Resistant Reusable Air Filter Pads

Wash and reuse these lightweight filter pads that resist mildew growth. Cut to the size you need; frames are sold separately.

Pads with more pores per inch catch smaller particles than pads with fewer pores per inch.

These pads meet UL 900 flame retardance requirements.

1/8" Thick
Trade Size	Material	Color	Max. Temperature, °F	Pores Per Inch		Each
12 × 12	Polyurethane Foam	Gray	250°	30, 60	00000000	00000
1/4" Thick
12 × 12	Polyurethane Foam	Gray	250°	30, 60	00000000	0000
1/2" Thick
12 × 12	Polyurethane Foam	Gray	250°	30, 60	00000000	0000
1" Thick
12 × 12	Polyurethane Foam	Gray	250°	30, 60	00000000	00000
2" Thick
12 × 12	Polyurethane Foam	Gray	250°	30, 60	00000000	00000

Reusable Air Filter Pads

Wash and reuse these pads. Cut to the size you need. No frame needed—rigid polyester is firm enough to be used without one.

Pads meet UL 900 flame retardance requirements.

1/2" Thick
Trade Size	MERV Filter Rating	Filter Efficiency @ 3 Microns	Removes Particle Size Down To, microns	Material	Color	Max. Temp., °F	Pkg. Qty.		Pkg.
12 × 12	5	20%	3	Polyester Plastic	Blue	225°	5	00000000	000000
1" Thick
12 × 12	6	35%	3	Polyester Plastic	Blue	225°	5	00000000	00000
2" Thick
12 × 12	__	__	__	Polyester Plastic	Green	200°	5	00000000	00000

Odor-Removal Air Filter Pads

With a higher carbon concentration than odor-removal air filter rolls, these pads handle heavier odors. Cut to the size you need; frames are sold separately.

All meet UL 900 flame retardance requirements.

Pads with a carbon concentration of 375 g/sq. ft. provide greater odor control than other pads and can handle ammonia, hydrogen sulfide, and other gases. They are often used in hospitals and laboratories.

300 g/sq. ft. Carbon Concentration
Trade Size	MERV Filter Rating	Filter Efficiency @ 3 Microns	Removes Particle Size Down To, microns	Material	Color	Max. Temperature, °F		Each
1" Thick
12 × 12	7	50%	3	Carbon-Coated Polyester Plastic	Black	120°	0000000	000000
375 g/sq. ft. Carbon Concentration
1" Thick
12 × 12	7	50%	3	Carbon-Coated Polyester Plastic	Black	120°	0000000	00000

HEPA Box Air Filters

Control dust and contaminants in hospitals, laboratories, and other demanding environments. These filters have a rigid frame that withstands fluctuations in airflow, such as those created by variable air volume systems. The sealing gasket is on the downstream side of the filter.

The trade size is the actual size of the filter.

UL Classified-rated filters meet flame retardance requirements.

For technical drawings and 3-D models, click on a part number.

Particleboard Frame
Trade Size	Filter Efficiency @ 0.3 Microns	Removes Particle Size Down To, microns	Material	Specifications Met		Each
3" Thick
12 × 12	99.97%	0.3	Fiberglass	__	0000000	0000000
5 3/4" Thick
12 × 12	99.97%	0.3	Fiberglass	UL Classified	0000000	000000
Aluminum Frame
2 3/4" Thick
12 × 12	99.97%	0.3	Fiberglass	UL 900	000000	000000
Galvanized Steel Frame
5 7/8" Thick
12 × 12	99.97%	0.3	Fiberglass	UL 900	000000	000000
Stainless Steel Frame
2 3/4" Thick
12 × 12	99.97%	0.3	Fiberglass	UL 900	0000000	000000
5 7/8" Thick
12 × 12	99.97%	0.3	Fiberglass	UL 900	0000000	000000

About Air Filter Efficiency Ratings

Pleated Panel Air Filters

Panel Air Filters

Heavy Duty Reusable Metal Panel Filters

Reusable Metal Panel Filters

Reusable Electrostatic Panel Air Filters

High-Efficiency Panel Air Filters

Ultra-Efficiency Panel Air Filters

Frames for Panel Air Filters

Air Filter Pads

Prefilter Air Filter Pads

Mildew-Resistant Reusable Air Filter Pads

Reusable Air Filter Pads

Odor-Removal Air Filter Pads

HEPA Box Air Filters