Duct Louvers | McMaster-Carr

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547 Products

Louvers

Movable-Blade Wall Louvers

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

Chemical-Resistant Movable-Blade Wall Louvers

Made of PVC, these louvers stand up to acids, alkalies, salts, and corrosive vapors in harsh environments and won’t rust.

Fixed-Blade Wall Louvers

Always open, these are our most basic wall louvers.

Heavy Duty Fixed-Blade Wall Louvers

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

Fixed-Blade Louvers for Block and Brick Walls

Sized to replace block or bricks.

Weather-Resistant Fixed-Blade Wall Louvers

Designed with blades that drain water down the jambs, these louvers keep water from running down the front of the blades, even in harsh weather.

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 and Filter

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

Combination Fixed- and
Movable-Blade Wall Louvers

Fixed front blades give you consistent sight lines when viewing these louvers from outside, while hidden rear blades open and close.

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.

Door Louvers

Allow air to circulate through doors while maintaining privacy.

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.

Duct and Fittings

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.

Dampers for Drop-Ceiling Diffusers

These dampers regulate airflow.

Airflow Dampers

Regulate airflow by adjusting dampers from fully open to fully closed.

Fire-Rated Airflow Dampers

In the event of a fire, these dampers automatically stop airflow through duct.

Automatic Airflow Dampers

Save energy and increase comfort by heating and cooling only the areas that need it.

Furnace Draft Dampers

Also known as barometric dampers, these dampers improve furnace performance by automatically opening and closing to maintain consistent airflow despite changing environmental conditions.

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.

Crush-Resistant Spiral Duct and Fittings

A spiral seam gives this duct greater strength and rigidity than standard duct.

Quick-Disconnect Duct and Fittings

Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.

Chemical-Resistant Duct and Fittings

Made of PVC plastic to withstand acids, alkalies, salts, and other corrosive vapors and fumes.

Self-Cleaning Blast Gates

Use in dust collection systems. The slide pushes through the top of the gate to clear debris.

Blast Gates

Control the flow of air and material through duct systems.

Automatic Blast Gates

More convenient than other blast gates, these automatic gates open and close in sync with dust collectors, fume exhausters, and other machines.

Easy-Install Blast Gates

Often added to existing systems, these gates install without disassembling duct. Also known as half gates.

Louvers

Movable-Blade Wall Louvers

Chemical-Resistant Movable-Blade Wall Louvers

Fixed-Blade Wall Louvers

Heavy Duty Fixed-Blade Wall Louvers

Fixed-Blade Louvers for Block and Brick Walls

Weather-Resistant Fixed-Blade Wall Louvers

Adjustable-Width Fixed-Blade Wall Louvers

Fixed-Blade Wall Louvers withAdjustable Register and Filter

Combination Fixed- andMovable-Blade Wall Louvers

Enclosure Louvers

Weather-Resistant Enclosure Louvers

Door Louvers

Roof Louvers

Duct and Fittings

Wall/Ceiling Registers

Floor Registers

Dampers for Drop-Ceiling Diffusers

Airflow Dampers

Fire-Rated Airflow Dampers

Automatic Airflow Dampers

Furnace Draft Dampers

Standard Duct and Fittings

Crush-Resistant Spiral Duct and Fittings

Quick-Disconnect Duct and Fittings

Chemical-Resistant Duct and Fittings

Self-Cleaning Blast Gates

Blast Gates

Automatic Blast Gates

Easy-Install Blast Gates

Fixed-Blade Wall Louvers with
Adjustable Register and Filter

Combination Fixed- and
Movable-Blade Wall Louvers