Vent Covers | McMaster-Carr

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Fitting Connection

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For Duct Width

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Environment

High-Pressure Washdown

1,065 Products

Heating, Ventilation, and Air Conditioning

Louvers

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

271 products

Return Grilles

Cover the opening where air is pulled into your HVAC system

35 products

Duct Vent Caps

Reduce downdrafts and prevent obstructions from entering vents

36 products

Registers

Direct and control airflow coming out of HVAC systems

39 products

Air Diverters

Guide air toward your workspace or deflect unwanted drafts

9 products

Enclosure Hoods

Keep enclosures watertight, even around intake and exhaust cutouts

5 products

Chimney Vent Caps

Cover chimneys to reduce downdrafts and block out debris

12 products

Chimney Pipe

Vent hot air and fumes from boilers, furnaces, and stoves

11 products

Chimney Storm Collars

Pair with chimney roof flashing to prevent leaks where chimneys pass through roofs

8 products

Chimney Pipe Fittings

Form straight, elbow, and tee connections between lengths of chimney pipe

15 products

Chimney Wall Bands

Support chimney pipe by securing it to walls

3 products

Chimney Roof Flashings

Prevent leaks where chimneys pass through roofs

8 products

Diffusers

Evenly disperse airflow into a room to maintain a consistent temperature throughout

70 products

Diffuser Dampers

Regulate the airflow coming out of drop-ceiling diffusers

10 products

Diffuser Collars

Connect diffusers to duct

4 products

Duct Airflow Dampers

Regulate airflow to sections of duct

99 products

Barometric Draft Dampers

Maintain consistent airflow in your furnace to improve its performance

6 products

Duct Fire Dampers

Automatically close at high temperatures to help prevent the spread of fire through duct

13 products

Fan Guards

Shield fans to prevent injury to workers and damage to electronic components

78 products

Exhaust Fan Guards

Protect exhaust fans from debris

15 products

Flue-Gas Exhausters

Vent furnaces and other gas- or oil-fired equipment

4 products

Fluid Handling

Breather Vents

Maintain even pressure and vacuum as temperatures change by allowing airflow in tanks and enclosures

155 products

Pressure-Relief Valves

Protect equipment by opening at a set pressure and closing when the pressure drops; for repeated use

66 products

Pipe Vent Caps

Keep rain and debris out of vertical exhaust pipe

5 products

Air Vent Valves

Eliminate air pockets from fluid lines to maintain consistent flow and prevent surges

39 products

Electrical Power, Networking, and Controlling

Electrical Enclosure Vents

Attach to sealed enclosures so air can flow to equalize temperature and pressure

10 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

14 products

Electrical Enclosure Drains

Release moisture to keep components dry

4 products

Electrical Enclosure Drain Vents

Prevent moisture from getting trapped inside enclosures while letting air flow through

6 products

Containers, Storage, and Furniture

Metal Panels

Close off openings in structures while allowing air to pass through

20 products

Drum Plug Caps

Access inside drums to fill them

4 products

Syringe Caps

Cover syringe tips when not in use to protect them and prevent leaks

2 products

Sealing

Pipe Flashing Seals

Slide over roof flashings for a watertight seal without the need for caulk

3 products