Steel Duct | McMaster-Carr

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1,251 Products

Heating, Ventilation, and Air Conditioning

Duct and Duct Fittings

Duct and Duct Fittings

Circulate air through HVAC systems using round, rectangular, and fabric duct

Chimney Pipe Fittings

Chimney Pipe Fittings

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

Chimney Pipe

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

Chimney Storm Collars

Chimney Storm Collars

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

Chimney Vent Caps

Chimney Vent Caps

Cover chimneys to reduce downdrafts and block out debris

Chimney Roof Flashings

Chimney Roof Flashings

Prevent leaks where chimneys pass through roofs

Diffuser Collars

Diffuser Collars

Connect diffusers to duct

Barometric Draft Dampers

Barometric Draft Dampers

Maintain consistent airflow in your furnace to improve its performance

Diffuser Dampers

Diffuser Dampers

Regulate the airflow coming out of drop-ceiling diffusers

Fluid Handling

Duct Hose

Connect to blowers and vacuums to move air, fumes, dust, chips, and liquids

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