McMaster-Carr

Choose a Category

	For Opening Width For Opening Width

1 3/4"

8 1/2"

12"-18"

18"-24"

21"-36"

24"-36"

36"-48"

	For Opening Height For Opening Height

	Mounting Location Mounting Location

	Mount Style Mount Style


Surface	Recess	Flush

	Frame Material Frame Material

	Blade Adjustability Blade Adjustability

Movable

Fixed

	Blade Material Blade Material

	Blade Operation Blade Operation

Gravity

Motorized

Pull Chain

	Louver Panel Style Louver Panel Style

Single

Double

Triple

	Overall Height Overall Height

	Frame Thickness Frame Thickness

	Mounting Flange Thickness Mounting Flange Thickness

	Overall Depth Overall Depth

	Overall Width Overall Width

	For Maximum Air Velocity For Maximum Air Velocity

1,200 fpm

2,000 fpm

2,500 fpm

	Frame Finish Frame Finish

	Shape Shape

	Number of Motors Number of Motors

	Material Material

	Component Component

Return Grille

Diffuser

Vent Cap

	Pipe Size Pipe Size

	Motor Voltage Motor Voltage

120V AC

240V AC

	For Use With For Use With

843 Products

Air Inlets

Louvers

Allow air to circulate through doors, walls, roofs, and enclosures.

Diffusers, Registers, and Grilles

Vent Caps

Cover external vents to reduce downdrafts and prevent obstructions from entering the vent.

Chimney Vent Caps

Cover chimneys to reduce downdrafts and prevent obstructions from entering.

Frostproof Vacuum-Breaking
Valves with Garden Hose Threads

Stop backward flow in outdoor faucets with garden hose thread (GHT) outlets.

Vacuum-Breaking Valves

For use with water in heating, cooling, and plumbing applications. Valves are metal.

Roof-Mount Exhaust Fans

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Air Inlets

Louvers

Diffusers, Registers, and Grilles

Vent Caps

Chimney Vent Caps

Frostproof Vacuum-BreakingValves with Garden Hose Threads

Vacuum-Breaking Valves

Roof-Mount Exhaust Fans

Frostproof Vacuum-Breaking
Valves with Garden Hose Threads