HVAC Duct Fittings | McMaster-Carr

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Adjustable-Angle Elbow

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Adjustment Sleeve

Downdraft Diverter

Duct with Access Panel

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Stainless Steel

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Chemical Resistant

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1,939 Products

Duct and Fittings

Standard Duct and Fittings

Standard Duct and Fittings

Deliver air for a range of HVAC applications, including exhaust and dust collection

Quick-Disconnect Duct and Fittings

Quick-Disconnect Duct and Fittings

The fastest to disassemble for dust collection and other frequently cleaned systems

Rectangular Duct and Fittings

Rectangular Duct and Fittings

Maximize the space in close quarters, such as inside walls and ceilings

Duct Flanges

Mount to air handlers and HVAC equipment to start a run of duct

Spiral Duct and Fittings

Spiral Duct and Fittings

A continuous seam reinforces duct against suction from dust collection systems

Chemical-Resistant Duct and Fittings

Chemical-Resistant Duct and Fittings

Withstand corrosive gases, vapors, and fumes that would eat away at most metal duct

Oval Duct and Fittings

Oval Duct and Fittings

Half the height of rectangular duct to fit into the tightest spaces

Duct Vent Caps

Cover wall and roof vents to prevent cold air and debris from entering your system

Tight-Seal Spiral Duct and Fittings

Tight-Seal Spiral Duct and Fittings

Gasketed fittings prevent leaks and the seam reinforces duct against suction from dust collection systems

Vibration-Damping Duct Connectors

Vibration-Damping Duct Connectors

Reduce shaking and noise from fans and blowers

Fabric Duct and Fittings

Fabric Duct and Fittings

Evenly distribute air from fans and blowers through large spaces

Other Products

Duct Airflow Dampers

Duct Airflow Dampers

Regulate airflow to sections of duct

Barometric Draft Dampers

Barometric Draft Dampers

Maintain consistent airflow in your furnace to improve its performance

Duct Blast Gates

Duct Blast Gates

Slide open and closed to control flow of air and material

Diffuser Collars

Diffuser Collars

Connect diffusers to duct

Duct Turning Vanes

Duct Turning Vanes

Guide air smoothly around sharp bends in rectangular duct

Diffuser Dampers

Diffuser Dampers

Regulate the airflow coming out of drop-ceiling diffusers

Duct Floor Sweeps

Duct Floor Sweeps

Get dust and debris off your floor and into your collection system

Duct Damper Handles

Duct Damper Handles

Replace an existing handle or pair with a blade to create your own damper

Duct Fire Dampers

Duct Fire Dampers

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

Duct Downdraft Diverters

Duct Downdraft Diverters

Prevent downdrafts from blowing back into ductwork while allowing air and fumes to vent

Smoke Candles

Light the wick for a short burst of smoke to observe airflow and detect leaks in HVAC systems

Smoke Pellets

Detect airflow and leaks in HVAC systems near server rooms and other areas with electronics

Smoke Powder

No flame needed—release a burst of powder to detect airflow and leaks in HVAC systems

Smoke Pens

Produce smoke to observe airflow and detect leaks in HVAC systems; reusable, unlike smoke candles

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