23 3/8 × 23 3/8 Filters | McMaster-Carr

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10"-High Cartridges for High-Pressure Filter Cartridge Housings 10"-High Cartridges for Plastic Filter Cartridge Housings 20"-High Cartridges for High-Pressure Filter Cartridge Housings 20"-High Cartridges for Plastic Filter Cartridge Housings 3M Respirator Filter Retainers Absolute-Rated Filter Bags Activated-Carbon Filter Felt Air Conditioning Filter Dryers Air Filter Adhesives Air Filter Frames Air Filter Holders Air Filter Housings Air Filter Racks Air Filter Regulators Air Filter Sprays Air Filter Tackifiers Air Filtering Fabric Air Filter-Regulator-Lubricators Air-Filter-Regulators for Air-Powered Vacuum Conveyors Air-Intake Filter Silencers American Air Filter-Compatible Air Filter Rolls ASME Filter Bags ASME Filter Housings Blanket-Wound Filter Cartridges Build-Your-Own Filter Cartridges Carbon Filter Cartridges Cleanable Filter Cartridges Compressed Air Filter Bowls Compressed Air Filter Elements Compressed Air Filter Seals Compressed Air Filter-Regulator-Lubricators Continental-Compatible Air Filter Rolls Drinking Fountain Filter Cartridges Dust Collector Filter Bags Dust Collector Filter Cartridges Farr-Compatible Air Filter Rolls Filter Bags Filter Ball Valves Filter Baskets Filter Breathers Filter Canisters Filter Capsules Filter Cartridges Filter Carts Filter Cloth Filter Crushers Filter Discs Filter Elements Filter Fabric Filter Fans Filter Felt Filter Funnels Filter Gaskets Filter Heads Filter Holders Filter Housings Filter Lubricators Filter Media Filter Media Pad Frames Filter Mesh Filter Paper Filter Pliers Filter Plugs Filter Regulators Filter Screens Filter Sheets Filter Silencers Filter Sleeves Filter Socks Filter Vessels Filter Washers Filter Wrenches Filter-Bag Accessories Filter-Bag Adapter Heads Filter-Bag Housings Filter-Cartridge Housings Filtering-Grade Cloth Filtering-Grade Wire Cloth Filter-Regulator-Lubricators Fine-Filtration Vacuums Food Industry Filter Cartridges Food Industry Filter Housings HEPA Filter Elements HEPA Filter Vacuum Cleaners HEPA Filter Vacuums Hydraulic Oil Filter Carts Ingersoll-Rand-Compatible Air Filter Elements Inline Filtration Mufflers Light Filtering Gel Mesh Filter Bags Oil Filter Cartridges Oil Filter Elements Oil Filter Tools Oil Filter Wrenches Panel Filter Frames Pleated Filter Cartridges Pneumatic Filter-Regulator-Lubricators Respirator Filter Cartridges Reusable Filter Cartridges Standard Filter Cartridges Standard Filtration Oil Removers Standard Filtration Strainers ULPA Filter Vacuum Cleaners ULPA Filter Vacuums Ultra-Fine Filtering Discs Water Filter Cartridges Water Filter Elements Water Filter Purifying Media Water Filter Wrenches Welding Filter Plates

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	For Use With For Use With

	System of Measurement System of Measurement

	Thickness Thickness

	Trade Size Trade Size	Show

23 3/8 × 23 3/8

	Trade Size Trade Size	Hide

7 3/16 × 9 11/16

7 3/8 × 16 1/2

8 3/8 × 11 1/4

8 3/4 × 20 7/8

9 3/8 × 16 1/2

11 3/8 × 17 3/8

11 1/2 × 23 1/2

11 3/4 × 13 1/2

12 1/16 × 21 3/4

13 1/8 × 13 1/8

17 7/8 × 11 7/8

22 1/4 × 30 1/4

23 3/8 × 23 3/8

23 1/2 × 23 1/2

24 1/2 × 22 1/2

25 1/2 × 35 1/2

	Filter Style Filter Style

	Box

	Frame Material Frame Material

Stainless Steel

	Removes Particle Size Down To Removes Particle Size Down To

Less than 100 microns

	Air Filter Performance Air Filter Performance

High-Efficiency Air Filter
(HEPA)

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Filter Efficiency @ 0.3 Microns Filter Efficiency @ 0.3 Microns

	Construction Construction

	Useful Life Useful Life

	Material Material

	Maximum Temperature Maximum Temperature

100° to 249.9° F

	Specifications Met Specifications Met

	For Removing For Removing

Dust and Particles

	Frame Finish Frame Finish

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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 900-rated filters meet flame retardance requirements.

Particleboard Frame
Trade Size	Filter Efficiency @ 0.3 Microns	Removes Particle Size Down To, microns	Material	Specifications Met		Each
11 1/2" Thick
23 3/8 × 23 3/8	99.97%	0.3	Fiberglass	UL 900	0000000	0000000
Galvanized Steel Frame
11 1/2" Thick
23 3/8 × 23 3/8	99.97%	0.3	Fiberglass	UL 900	0000000	000000
Stainless Steel Frame
11 1/2" Thick
23 3/8 × 23 3/8	99.97%	0.3	Fiberglass	UL 900	0000000	000000

High-Capacity Narrow-Wedge V-Belts

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)

HEPA Box Air Filters