Long-Life Air Filters | McMaster-Carr

Filter by

HVAC Filter Trade Size

Filter Type

MERV Filter Rating

Thickness

Frame Material

For Removing

Filter Efficiency @ 3 Microns

85%

95%

99.97%

Filter Efficiency @ 1 Microns

65%

90%

99.97%

Number of Panels

Filter Efficiency @ 0.3 Microns

20%

75%

99.97%

Removes Particle Size Down To

For Use With

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

Maximum Temperature

Inlet Pipe Size

Outlet Pipe Size

Overall Height

End-to-End Length

28 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.

Long-Life Box Air Filters

Four Panels

Six Panels

Eight Panels

Multiple panels maximize filtering surface area for long service life. These MERV 14 air filters capture particles down to 0.3 microns. 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.

Actual size is up to 5/8" less than trade size.

		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
4 Panels
12" Thick
12 × 24	14	75%	90%	95%	0.3	Fiberglass	Plastic	180°	0000000	0000000
20 × 24	14	75%	90%	95%	0.3	Fiberglass	Plastic	180°	0000000	000000
24 × 24	14	75%	90%	95%	0.3	Fiberglass	Plastic	180°	0000000	000000
6 Panels
12" Thick
20 × 20	14	75%	90%	95%	0.3	Fiberglass	Plastic	180°	0000000	000000
8 Panels
12" Thick
12 × 24	14	75%	90%	95%	0.3	Fiberglass	Plastic	180°	0000000	000000
20 × 24	14	75%	90%	95%	0.3	Fiberglass	Plastic	180°	0000000	000000
24 × 24	14	75%	90%	95%	0.3	Fiberglass	Plastic	180°	0000000	000000

HEPA Long-Life Box Air Filters

Aluminum Frame

Steel Frame

Extend the time between filter changes in laboratories, hospitals, and other places with a high risk of airborne contaminants. These filters have tight pleats, which increase the surface area for catching particles. They’re a HEPA filter, so they capture small particles, such as allergens and germs, more efficiently than standard air filters.

Filters with an aluminum frame have a V-shape design that increases the filtering area and reduces resistance to air, leading to an even longer life than filters with a standard design.

		Filter Efficiency @
HVAC Filter Trade Size	MERV Filter Rating	0.3 Microns	1 Micron	3 Microns	Removes Particle Size Down To, microns	Material	Max. Temp., °F		Each
Aluminum Frame
11 1/2" Thick
24 × 12	16	99.97%	99.97%	99.97%	0.3	Fiberglass	180°	0000000	0000000
24 × 24	16	99.97%	99.97%	99.97%	0.3	Fiberglass	180°	0000000	000000
Steel Frame
11 1/2" Thick
24 × 12	16	99.97%	99.97%	99.97%	0.3	Fiberglass	160°	0000000	000000
24 × 24	16	99.97%	99.97%	99.97%	0.3	Fiberglass	160°	0000000	000000

High-Efficiency Long-Life Panel Air Filters

With tight pleats, these filters have a larger surface area than filters with standard pleats for improved efficiency and an even longer life. These filters strike a good balance of filtering efficiently while allowing airflow, making them a more cost-effective option than higher rated filters. All are effective at capturing common allergens such as dander, mold spores, and pollen. Use them in data centers and other locations that require extra-clean air.

		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		Each
2" Thick
12 × 24	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	000000
16 × 20	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
16 × 25	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
18 × 24	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
20 × 20	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
20 × 24	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
20 × 25	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
24 × 24	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
4" Thick
12 × 24	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
16 × 20	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
16 × 25	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
20 × 20	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
20 × 24	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	00000
20 × 25	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	000000
24 × 24	11	20%	65%	85%	1	Fiberglass	Plastic	175°	0000000	000000

Inline Air-Release Valves for Water

Max. Pressure: 125 psi
Temperature Range: 40° to 240° F

Eliminate air pockets without stopping flow—these valves have an internal wire brush that traps air bubbles and discharges them through the top relief port while allowing inline flow from the inlet to the outlet. They are often used to increase efficiency in heating and cooling systems. The vented relief port exhausts discharge directly. Valves have a durable bronze body for a long service life.

Inlet		Outlet		Relief Port
Pipe Size	Location	Pipe Size	Location	Connection Type	Location	Overall Ht.	End-to-End Lg.		Each
NPT Female Inlet and Outlet
Bronze Body
3/4	Side	3/4	Side	Vent	Top	6 15/16"	2 11/16"	0000000	0000000
1	Side	1	Side	Vent	Top	6 1/2"	3 1/8"	0000000	000000