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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12 in. Sheet Metal Roof Pipe Flashing for Round Duct
$109.99Fit a 12 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 12 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$109.99Qty in Cart: 0Quantity:Price:$109.99Subtotal: -
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18 x 16 x 14 in. Sheet Metal Duct T-Wye, 45° Branch
$197.00This 18 x 16 x 14 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 18 in. x 16 in. x 14 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$197.00 -
20 in. Evaporative Cooler Slide Damper
$14.49Use this 20 in. slide damper with compatible evaporative cooler ductwork.Nominal size in product title: 20 in.Confirm damper dimensions, travel direction and roof-jack compatibility before ordering.$14.49Qty in Cart: 0Quantity:Price:$14.49Subtotal: -
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20 in. Round Sheet Metal Duct End Cap
$62.99Close the end of an unused 20 in. round duct run with this sheet metal end cap.Nominal duct size: 20 in.For terminating compatible round ductworkCheck whether the cap fits inside or over your duct...$62.99 -
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24 x 8 x 8 in. Wall or Floor Register Box, 8 in. Round Duct Connection
$99.99Connect a 24 x 8 in. register opening to 8 in. round HVAC supply duct with this wall or floor register box.Register opening: 24 x 8 in.Round duct connection: 8 in.Sheet metal register bootMeasure the...$99.99Qty in Cart: 0Quantity:Price:$99.99Subtotal: -
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4 in. x 10 ft. Aluminum Flexible Dryer Exhaust Duct
$53.99Route dryer or fan exhaust with this 4 in. diameter flexible aluminum duct, 10 ft. long when uncompressed.Nominal diameter: 4 in.Uncompressed length: 10 ft.Flexible aluminum duct for dryer or fan...$53.99 -
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5 in. x 36 in. Snap-Lock Round HVAC Duct Pipe
$39.99Build a straight round duct run with this 5 in. diameter, 36 in. long snap-lock sheet metal pipe.Nominal diameter: 5 in.Length: 36 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$39.99 -
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5 in. x 60 in. Snap-Lock Round HVAC Duct Pipe
$104.99Build a straight round duct run with this 5 in. diameter, 60 in. long snap-lock sheet metal pipe.Nominal diameter: 5 in.Length: 60 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$104.99 -
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6 x 4 x 4 in. Galvanized Duct T-Wye, 45° Branch
$36.00This 6 x 4 x 4 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 6 in. x 4 in. x 4 in.Crimped outlet for joining compatible metal pipeUsed to branch air to another...$36.00 -
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7 in. x 36 in. Snap-Lock Round HVAC Duct Pipe
$51.99Build a straight round duct run with this 7 in. diameter, 36 in. long snap-lock sheet metal pipe.Nominal diameter: 7 in.Length: 36 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$51.99 -
8 in. Sheet Metal Roof Pipe Flashing for Round Duct
$78.99Fit a 8 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 8 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$78.99Qty in Cart: 0Quantity:Price:$78.99Subtotal: -
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9 in. Tabbed Round Duct Start Collar, Snap-Together Sheet Metal
$12.99Add a 9 in. round duct takeoff with this tabbed, snap-together sheet metal start collar.Nominal duct size: 9 in.Tabbed mounting edgeSnap-together constructionConfirm opening size and the...$12.99