HVAC Ductwork
Shop HVAC ductwork and installation supplies for residential and light-commercial heating, air-conditioning and evaporative-cooling systems. Our selection includes insulated flexible duct, galvanized sheet-metal duct fittings, round duct pipe, elbows, reducers, start collars, T-wye fittings, register boxes, return-air boxes and related installation materials.
Use Flexible Duct for insulated supply and return-air runs, or browse Metal Duct Fittings for components used to connect, transition, branch and terminate an HVAC duct system. Duct tape, cable ties and related fasteners are also available for securing compatible connections.
Before ordering, verify the duct diameter, fitting dimensions, connection type, insulation rating and available installation space. HVAC duct sizing affects airflow and system performance, so ductwork should be selected and installed according to the equipment requirements and applicable building codes.
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20 in. Sheet Metal Roof Pipe Flashing for Round Duct
$211.99Fit a 20 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 20 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$211.99Qty in Cart: 0Quantity:Price:$211.99Subtotal: -
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3 in. Adjustable 90 Round Sheet Metal Duct Elbow
$12.99Turn a 3 in. round HVAC duct run with this adjustable sheet metal elbow.Nominal diameter: 3 in.Adjusts from straight to a 90° bendSegmented 26-gauge steel, as listedSet the angle for your layout,...$12.99 -
3 in. Sheet Metal Roof Pipe Flashing for Round Duct
$47.99Fit a 3 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 3 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$47.99Qty in Cart: 0Quantity:Price:$47.99Subtotal: -
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3 in. x 10 ft. Aluminum Flexible Dryer Exhaust Duct
$45.99Route dryer or fan exhaust with this 3 in. diameter flexible aluminum duct, 10 ft. long when uncompressed.Nominal diameter: 3 in.Uncompressed length: 10 ft.Flexible aluminum duct for dryer or fan...$45.99 -
4 in. Sheet Metal Roof Pipe Flashing for Round Duct
$48.99Fit a 4 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 4 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$48.99Qty in Cart: 0Quantity:Price:$48.99Subtotal: -
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4 in. x 36 in. Snap-Lock Round HVAC Duct Pipe
$35.99Build a straight round duct run with this 4 in. diameter, 36 in. long snap-lock sheet metal pipe.Nominal diameter: 4 in.Length: 36 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$35.99 -
6 in. Sheet Metal Roof Pipe Flashing for Round Duct
$57.99Fit a 6 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 6 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$57.99Qty in Cart: 0Quantity:Price:$57.99Subtotal: -
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6 in. x 60 in. Snap-Lock Round HVAC Duct Pipe
$109.99Build a straight round duct run with this 6 in. diameter, 60 in. long snap-lock sheet metal pipe.Nominal diameter: 6 in.Length: 60 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$109.99 -
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7 in. Round Sheet Metal Duct End Cap
$22.99Close the end of an unused 7 in. round duct run with this sheet metal end cap.Nominal duct size: 7 in.For terminating compatible round ductworkCheck whether the cap fits inside or over your duct and...$22.99 -
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7 in. x 60 in. Snap-Lock Round HVAC Duct Pipe
$114.99Build a straight round duct run with this 7 in. diameter, 60 in. long snap-lock sheet metal pipe.Nominal diameter: 7 in.Length: 60 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$114.99