McMaster-Carr

Choose a Category

	Thickness Thickness

1/2"

	Minimum Width Minimum Width

	Useful Life Useful Life

Disposable

Reusable

	MERV Filter Rating MERV Filter Rating

Not Rated

	Material Material

Plastic

Aluminum

Fiberglass

	Filter Efficiency Rating Filter Efficiency Rating

Low Efficiency/Prefilter

General Purpose

Not Rated

	Construction Construction

Pleated

Corrugated

Fibrous

	Frame Material Frame Material

Cardboard

Aluminum

	Maximum Temperature Maximum Temperature

150° F

180° F

240° F

	Maximum Size Maximum Size

	Minimum Length Minimum Length

	Minimum Size Minimum Size

	Removes Particle Size Down To Removes Particle Size Down To

3 microns

10 microns

	Maximum Filter Efficiency Maximum Filter Efficiency

80%

99%

	Minimum Filter Efficiency Minimum Filter Efficiency

75%

90%

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38 Products

About Air Filter Efficiency Ratings

Filters are sold as trade size; add 1/2" to the length and width you need. Minimum filter size is 4" × 4". Maximum filter size is 23" × 30". Multiply the length × width to determine square inches. Then, see size ranges for pricing.

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

They meet UL 900 flame retardance requirements.

Also Available: Filters larger than 23" × 30". Please ask for 3923T999 and specify material, thickness, actual length, and actual width.

1" Thick
Size Range, sq. in.	MERV Filter Rating	Filter Efficiency	Removes Particle Size Down To, microns	Material	Frame Material	Max. Temp., °F	Pkg. Qty.		Pkg.
16-149	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
150-199	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	00000
200-249	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
250-299	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
300-399	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
400-499	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
500-599	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
600-690	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
2" Thick
16-149	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	00000
150-199	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	00000
200-249	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
250-299	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
300-399	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
400-499	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
500-599	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000
600-690	9	90%-99%	3	Polyethylene Plastic/Polypropylene Plastic Blend	Cardboard	150°	12	0000000	000000

Made-to-Order Prefilter Panel Air Filters

Minimum filter size is 4" × 4". Maximum filter size is 23" × 30". Multiply the length × width to determine square inches. Then, see size ranges for pricing.

These filters are an economical choice for protecting more expensive filters that catch finer particles. They are typically used as replacement prefilters in HVAC equipment.

They meet UL 900 flame retardance requirements.

Also Available: Filters larger than 23" × 30". Please ask for 3884T999 and specify material, thickness, actual length, and actual width.

1" Thick
Size Range, sq. in.	MERV Filter Rating	Material	Frame Material	Max. Temperature, °F	Pkg. Qty.		Pkg.
16-149 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	000000
150-199 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
200-249 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
250-299 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
300-399 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
400-499 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
500-599 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
600-690 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
2" Thick
16-149 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
150-199 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
200-249 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
250-299 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
300-399 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	00000
400-499 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	000000
500-599 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	000000
600-690 sq. in.	Not Rated	Fiberglass	Cardboard	180°	12	0000000	000000

Made-to-Order Heavy Duty Reusable Metal Panel Filters

We can get you any size filter. Multiply the length × width to determine square inches. Then, see size ranges for pricing.

These filters are also known as metal mesh filters. With a frame made of a thick gauge metal, they are durable. These frames can be washed and reused.

Filters meet UL 900 flame retardance requirements.

Also Available: Filters larger than 599 square inches. Please ask for 2150K999 and specify thickness, actual length, and actual width.

1/2" Thick
Size Range	MERV Filter Rating	Filter Efficiency	Removes Particle Size Down To, microns	Material	Frame Gauge	Max. Temperature, °F		Each
1 sq. in.-299 sq. in.	4	75%-80%	10	Aluminum	18	240°	0000000	000000
300 sq. in.-599 sq. in.	4	75%-80%	10	Aluminum	18	240°	0000000	00000
1" Thick
1 sq. in.-299 sq. in.	4	75%-80%	10	Aluminum	18	240°	0000000	00000
300 sq. in.-599 sq. in.	4	75%-80%	10	Aluminum	18	240°	0000000	00000
2" Thick
1 sq. in.-299 sq. in.	4	75%-80%	10	Aluminum	18	240°	0000000	00000
300 sq. in.-599 sq. in.	4	75%-80%	10	Aluminum	18	240°	0000000	00000

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About Air Filter Efficiency Ratings

Made-to-Order Pleated Panel Air Filters

Made-to-Order Prefilter Panel Air Filters

Made-to-Order Heavy Duty Reusable Metal Panel Filters