Air Deflectors | McMaster-Carr

	Pipe Size Pipe Size

	Thread Type Thread Type

	Mounting Location Mounting Location

	System of Measurement System of Measurement

Inch

Metric

	For Opening Width For Opening Width

	For Opening Height For Opening Height

	Mount Style Mount Style


Surface	Recess	Flush

	Frame Material Frame Material

	Gender Gender

Male

Female

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

DFARS Specialty Metals
COTS-Exempt

	Body Material Body Material

	For Reducing For Reducing

Noise

Particles

Oil Mist

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	For Use With For Use With

Air

Inert Gas

Water

	Component Component

	Material Material

	Blade Adjustability Blade Adjustability

Movable

Fixed

	Blade Operation Blade Operation

Gravity

Motorized

Pull Chain

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Overall Width Overall Width

	Overall Height Overall Height

	Maximum Temperature Maximum Temperature

	Blade Material Blade Material

1,294 Products

Diffusers, Registers, and Grilles

Air Diverters

Guide air toward your workspace or deflect unwanted drafts with these diverters and covers.

Ready-to-Connect Drop-Ceiling Diffusers

No additional fittings or collars needed.

Drop-Ceiling Diffusers

Place these diffusers in the grid of a drop ceiling to distribute air evenly throughout your space.

Dampers for Drop-Ceiling Diffusers

These dampers regulate airflow.

Ready-to-Connect Moisture-Resistant
Drop-Ceiling Diffusers

No additional fittings or collars needed.

Moisture-Resistant Drop-Ceiling Diffusers

A vapor barrier provides moisture protection as these diffusers spread hot or cold air around a room.

Snap-On Collars for Drop-Ceiling Diffusers

Connect diffusers to duct.

Ceiling Diffusers

Evenly disperse airflow into a room to maintain a consistent temperature throughout the space.

Ready-to-Connect Ceiling Diffusers

Diffusers come with a collar and damper already in place for simple installation.

Wall/Ceiling Registers

Direct air coming out of HVAC systems. Adjust the damper to control airflow.

Floor Registers

Install onto floor ducts to direct hot and cold air from your HVAC system.

Return Grilles with Filter Holder

Add a filter to these grilles for protection against dust and debris entering your HVAC system.

Drop-Ceiling Return Grilles with Filter Holder

Place these grilles in the grid of a drop ceiling.

Return Grilles

Cover the opening where air is pulled into your HVAC system.

Vent Caps

Wall Vent Caps

Sloped Roof Vent Caps

Standard Duct and Fittings

No need for clamps or connectors—duct and fittings have a male end that is slightly smaller than its female end for simple assembly.

Louvers

Adjustable-Width Fixed-Blade Wall Louvers

Get an exact fit for your opening by sliding out these louvers to the width you need.

Fixed-Blade Wall Louvers with Adjustable Register

Mount these louvers through an outside wall and control airflow from the inside by adjusting the register.

Fixed-Blade Wall Louvers with
Adjustable Register and Filter

The included filter cleans the air as it passes through these louvers.

Fixed-Blade Wall Louvers

Always open, these are our most basic wall louvers.

Fixed-Blade Louvers for Block and Brick Walls

Mount these louvers into openings that are too small for most louvers. They are sized for use in block and brick walls.

Heavy Duty Fixed-Blade Wall Louvers

Constructed with a thick frame and blades, these louvers have a long service life.

Heavy Duty Movable-Blade Wall Louvers

Thicker than standard movable-blade wall louvers, these are rugged and dependable.

Corrosion-Resistant Movable-Blade Wall Louvers

Use these louvers in harsh environments—they won't rust.

Movable-Blade Wall Louvers

These gravity-operated louvers remain open only when air flows, preventing backdrafts.

Door Louvers

Allow air to circulate through doors while maintaining privacy.

Enclosure Louvers

Relieve heat buildup and prevent condensation from forming inside enclosures and other small spaces.

Weather-Resistant Enclosure Louvers

With a gasketed sealing kit, these louvers shield your enclosure from dirt, moisture, and weather while regulating heat and stopping condensation from forming inside.

Fire-Rated Door Louvers

A spring-loaded fusible link locks the blades closed if the temperature reaches 167° F. Louvers meet UL 10C fire requirements.

Roof Louvers

These louvers are gravity operated. The blades open when your roof-mounted exhaust fan goes on and close when it's off, preventing backdrafts.

Gas and Chimney Vents

Gas Chimney Vents and Fittings

For use with gas-fired equipment, such as boilers and furnaces, these vent pipes and fittings withstand temperatures up to 400° F. Also known as type B gas vents.

Chimney Vent Caps

Cover chimneys to reduce downdrafts and prevent obstructions from entering.

High-Temperature Chimney Vents and Fittings

Built to withstand temperatures up to 1000° F, these vent pipes and fittings are for use with boilers, furnaces, stoves, and other equipment that is fired by coal, gas, oil, propane, or wood.

Spark-Protection Chimney Vent Caps

The expanded mesh on these vent caps provides spark protection.

Exhaust Pipe Caps

Keep rain and debris out of vertical exhaust pipe with these caps that open with slight pressure from exhaust.

Mufflers

Compact High-Flow Mufflers

A small hex size makes these high-flow mufflers a great fit for cramped spaces.

High-Flow Mufflers

Commonly used with high-flow, air-powered equipment, such as diaphragm pumps and valves, these mufflers reduce noise and filter exhaust fumes without restricting flow.

Corrosion-Resistant Mufflers

Made entirely of stainless steel, these mufflers stand up to harsh, corrosive environments.

Oil-Mist-Eliminating Mufflers

In addition to a filter, these mufflers have a wool felt disc to trap oil mist.

Flow-Control Mufflers

Adjust the flow by turning the screw. Use these mufflers with air-powered tools and cylinders to reduce noise and filter exhaust fumes.

Mufflers

Use these mufflers with air-powered tools, valves, and cylinders to reduce noise and filter exhaust fumes.

Inline Mufflers

With a threaded connection on both ends, these mufflers can be installed anywhere in your line.

Oil-Mist-Recycling Mufflers

Also known as reclassifiers, these mufflers have a clear reservoir with a drain plug to remove and store oil mist for reuse.

Easy-to-Clean Mufflers

These mufflers can be cleaned for an extended service life.

Clog-Resistant Mufflers

Replace your muffler less often—these have a filter design that stays clean longer than porous mufflers.

Flame-Resistant High-Noise-Reducing Mufflers

Suitable for use with welding equipment, these mufflers are made of flame-resistant materials. They reduce noise by 35 dB.

High-Noise-Reducing Mufflers

Install these mufflers in air-powered drills and other loud equipment. They filter exhaust fumes and reduce noise by 30 dB, a reduction that's equivalent to putting in earplugs.

Clog-Indicating High-Noise-Reducing Mufflers

Don’t let an unexpected clog interrupt your work. These mufflers have a filter that slides up slowly as it clogs to indicate when the muffler should be replaced. They reduce noise by 30-35 dBA

Enclosure Intake and Exhaust Hoods

These hoods keep your enclosure watertight, even around intake and exhaust cutouts.

Exhaust Filters/Mufflers for Dry High-Vacuum Pumps

Purify exhaust fumes while silencing the noise from your oil-free high-vacuum pumps.

Aerators

Electric Aerators

A rubber air diffuser provides uniform bubble distribution.

Air-Powered Aerators

Connect to a compressed air line.

Diffusers, Registers, and Grilles

Air Diverters

Ready-to-Connect Drop-Ceiling Diffusers

Drop-Ceiling Diffusers

Dampers for Drop-Ceiling Diffusers

Ready-to-Connect Moisture-ResistantDrop-Ceiling Diffusers

Moisture-Resistant Drop-Ceiling Diffusers

Snap-On Collars for Drop-Ceiling Diffusers

Ceiling Diffusers

Ready-to-Connect Ceiling Diffusers

Wall/Ceiling Registers

Floor Registers

Return Grilles with Filter Holder

Drop-Ceiling Return Grilles with Filter Holder

Return Grilles

Vent Caps

Wall Vent Caps

Sloped Roof Vent Caps

Standard Duct and Fittings

Standard Duct and Fittings

Louvers

Adjustable-Width Fixed-Blade Wall Louvers

Fixed-Blade Wall Louvers with Adjustable Register

Fixed-Blade Wall Louvers withAdjustable Register and Filter

Fixed-Blade Wall Louvers

Fixed-Blade Louvers for Block and Brick Walls

Heavy Duty Fixed-Blade Wall Louvers

Heavy Duty Movable-Blade Wall Louvers

Corrosion-Resistant Movable-Blade Wall Louvers

Movable-Blade Wall Louvers

Door Louvers

Enclosure Louvers

Weather-Resistant Enclosure Louvers

Fire-Rated Door Louvers

Roof Louvers

Gas and Chimney Vents

Gas Chimney Vents and Fittings

Chimney Vent Caps

High-Temperature Chimney Vents and Fittings

Spark-Protection Chimney Vent Caps

Exhaust Pipe Caps

Mufflers

Compact High-Flow Mufflers

High-Flow Mufflers

Corrosion-Resistant Mufflers

Oil-Mist-Eliminating Mufflers

Flow-Control Mufflers

Mufflers

Inline Mufflers

Oil-Mist-Recycling Mufflers

Easy-to-Clean Mufflers

Clog-Resistant Mufflers

Flame-Resistant High-Noise-Reducing Mufflers

High-Noise-Reducing Mufflers

Clog-Indicating High-Noise-Reducing Mufflers

Enclosure Intake and Exhaust Hoods

Enclosure Intake and Exhaust Hoods

Exhaust Filters/Mufflers for Dry High-Vacuum Pumps

Exhaust Filters/Mufflers for Dry High-Vacuum Pumps

Aerators

Electric Aerators

Air-Powered Aerators

Ready-to-Connect Moisture-Resistant
Drop-Ceiling Diffusers

Fixed-Blade Wall Louvers with
Adjustable Register and Filter