12 × 12 Filters | McMaster-Carr

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52 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.

Pleated Panel Air Filters

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.

1" Thick

		Filter Efficiency @
HVAC Filter 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	8	44%	73%	3	Polyester Plastic/Polyethylene Plastic Blend	Cardboard	180°	00000000	000000
Pkg. of 12
12 × 12	8	44%	73%	3	Polyester Plastic/Polyethylene Plastic Blend	Cardboard	180°	00000000	00000

2" Thick

		Filter Efficiency @
HVAC Filter 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	8	44%	73%	3	Polyester Plastic/Polyethylene Plastic Blend	Cardboard	180°	00000000	000000
Pkg. of 12
12 × 12	8	44%	73%	3	Polyester Plastic/Polyethylene Plastic Blend	Cardboard	180°	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” more or 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.

Prefilters
HVAC Filter 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	150°	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	150°	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.

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

1/2" Thick
HVAC Filter 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
2" Thick
12 × 12	4	10	Aluminum	18	240°	00000000	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.

1/2" Thick
HVAC Filter Trade Size	Material	Frame Gauge	Max. Temperature, °F	Filter Style		Each
12 × 12	Aluminum	25	240°	Panel	0000000	000000
1" Thick
12 × 12	Aluminum	24	240°	Panel	0000000	00000
2" Thick
12 × 12	Aluminum	33	240°	Panel	0000000	00000

Quick-Disconnect Reusable Metal Panel 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. These filters can be washed and reused. They are made of polypropylene, so an electrostatic charge attracts dust and particles to them.

3/8" Thick
HVAC Filter Trade Size	Material	Frame Material	Frame Gauge	Max. Temperature, °F	Filter Style		Each
12 × 12	Polypropylene Plastic	Stainless Steel	26	180°	Panel	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.

1" Thick
HVAC Filter 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

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.

1" Thick

		Filter Efficiency @
HVAC Filter 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 @
HVAC Filter 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

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.

1" Thick

		Filter Efficiency @
HVAC Filter 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	00000

2" Thick

		Filter Efficiency @
HVAC Filter 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	00000

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.

Frames

Frame

Replacement Retaining Clip

Frames								Replacement Retaining Clips
For HVAC Filter 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.

1/4" Thick
HVAC Filter Trade Size	Material	Surface Treatment	Color	Max. Temperature, °F	Pkg. Qty.		Pkg.
12 × 12	Polyester Plastic	__	White	220°	10	0000000	000000
1/2" Thick
12 × 12	Polyester Plastic	Tacky	Blue, White	220°	10	0000000	00000
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 standards for flame retardance.

Fiberglass

						Pkg. of 6		Pkg. of 50
HVAC Filter Trade Size	MERV Filter Rating	Filter Efficiency @ 3 Microns	Removes Particle Size Down To, microns	Color	Max. Temp., °F		Pkg.		Pkg.
1" Thick
12 × 12	6	35%	3	White	250°	00000000	000000	00000000	0000000
2" Thick
12 × 12	6	35%	3	White	250°	00000000	00000	00000000	000000

Reusable Air Filter Pads

Wash and reuse these pads. Cut to the size you need.

These pads meet UL 900 flame retardance requirements.

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

Polyester pads require no frame—rigid polyester is firm enough to be used without one.

Polyurethane Foam

1/8" Thick
HVAC Filter Trade Size	Color	Maximum Temperature	Pores Per Inch		Each
12 × 12	Gray	250° F	30, 60	00000000	00000
1/4" Thick
12 × 12	Gray	250° F	30, 60	00000000	0000
1/2" Thick
12 × 12	Gray	250° F	30, 60	00000000	0000
1" Thick
12 × 12	Gray	250° F	30, 60	00000000	00000
2" Thick
12 × 12	Gray	250° F	30, 60	00000000	00000

Polyester Plastic

1/2" Thick
HVAC Filter Trade Size	MERV Filter Rating	Filter Efficiency @ 3 Microns	Removes Particle Size Down To, microns	Material	Color	Maximum Temperature	Pkg. Qty.		Pkg.
12 × 12	5	20%	3	Polyester Plastic	Blue	225° F	5	00000000	000000
1" Thick
12 × 12	6	35%	3	Polyester Plastic	Blue	225° F	5	00000000	00000
2" Thick
12 × 12	__	__	__	Polyester Plastic	Blue	200° F	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
HVAC Filter 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-Filled Polyester Plastic	Black	120°	0000000	000000
375 g/sq. ft. Carbon Concentration
1" Thick
12 × 12	7	50%	3	Carbon-Filled 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.

Particleboard Frame
HVAC Filter 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

ULPA Box Air Filters

Purify the air in your most sensitive environments. These filters remove 99.999% of dust and other particles, so they're best in areas where high air purity matters, such as semiconductor, pharmaceutical, and aerospace facilities. Constructed with fibers more densely woven than a HEPA filter, they catch 10 times more particles. However, they need to be changed more often than HEPA filters because they collect contaminants more quickly. All are UL rated for flame retardance.

		Filter Efficiency @
HVAC Filter Trade Size	MERV Filter Rating	0.3 Microns	1 Micron	3 Microns	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temp., °F		Each
11 1/2" Thick
12 × 12	20	99.999%	100%	100%	0.3	Fiberglass	Galvanized Steel	180°	0000000	0000000