Air Conditioning Duct | McMaster-Carr

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	Shape Shape


Straight	90° Elbow

Cap	Adjustable- Angle Elbow

Tee	45° Elbow

Wye	30° Elbow

60° Elbow

	Material Material

	Finish Finish

	ID ID

	OD OD

	Component Component

	Connection Type Connection Type

Press Fit

Interlocking Bracket

Quick-Disconnect Clamp

Worm-Drive Clamp

Twist Connect

	Gauge Gauge

	Gender Gender

Male

Female

	End Construction End Construction

	For Duct Shape For Duct Shape

Round

Rectangular

Square

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

	Flexibility Flexibility


Very Flexible	Flexible

	Flange Mount Type Flange Mount Type

Screw On

Weld On

	Color Color

	Blue		Yellow
	Silver		Black
	White		Clear
	Gray

	Overall Depth Overall Depth

	Length Length

	Duct Construction Duct Construction

Closed

Open

	Number of Mounting Holes Number of Mounting Holes

	Flange Thickness Flange Thickness

	Gate Material Gate Material

Aluminum

Stainless Steel

Steel

Plastic

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About Duct Connections

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.

Quick-Disconnect Duct and Fittings

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

Sure-Seal Spiral Duct and Fittings

Gaskets create a tight seal—you don't need to seal joints with coating or tape.

Crush-Resistant Spiral
Duct and Fittings

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

Chemical-Resistant Duct and Fittings

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

Rectangular Duct and Fittings

Often used in tight spaces, such as in walls and ceilings, rectangular duct allows you to select larger sizes without increasing duct height.

Straight-Run Fabric Duct

Evenly distribute air from fans and blowers throughout large spaces.

Duct Flanges

Bolt flanges to equipment to start a run of duct.

Weld-On Duct Flanges

Weld flanges to equipment to start a run of duct.

Vibration-Damping Duct Connectors

Add a flexible joint to your system to reduce vibration caused by fans and blowers.

Blast Gates

Control the flow of air and material through duct systems.

Easy-Install Blast Gates

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

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.

Self-Cleaning Blast Gates

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

Duct Noise Reducers

These noise reducers mount directly to spiral duct to decrease noise by as much as 50%.

Automatic Airflow Dampers

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

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.

Duct Access Panels

Also known as cleanouts, panels cover cutouts in duct to provide access for inspection and cleaning.

Quick-Open Duct Access Panels

The panels open and close by turning the knobs.

Gas and Chimney Vents

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.

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.