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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18 in. Evaporative Cooler Slide Damper
$13.39Use this 18 in. slide damper with compatible evaporative cooler ductwork.Nominal size in product title: 18 in.Confirm damper dimensions, travel direction and roof-jack compatibility before ordering.$13.39Qty in Cart: 0Quantity:Price:$13.39Subtotal: -
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18 in. x 25 ft. Insulated Flexible HVAC Duct, R-8
$403.10Run insulated supply or return air duct with this 18 in. diameter x 25 ft. flexible duct rated R-8.Insulation rating: R-8Nominal length: 25 ft.Nominal duct diameter: 18 in.Confirm the required...$403.10 -
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18 x 12 x 12 in. Sheet Metal Duct T-Wye, 45° Branch
$197.00This 18 x 12 x 12 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 18 in. x 12 in. x 12 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$197.00 -
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8 in. x 25 ft. Insulated Flexible HVAC Duct, R-6
$132.23Run insulated supply or return air duct with this 8 in. diameter x 25 ft. flexible duct rated R-6.Insulation rating: R-6Nominal length: 25 ft.Nominal duct diameter: 8 in.Confirm the required...$132.23 -
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8 in. x 60 in. Snap-Lock Round HVAC Duct Pipe
$119.00Build a straight round duct run with this 8 in. diameter, 60 in. long snap-lock sheet metal pipe.Nominal diameter: 8 in.Length: 60 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$119.00 -
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9 in. Round Duct Disc Damper with Hardware
$16.99Control airflow in a 9 in. round metal supply duct with this disc damper and hardware.Nominal duct diameter: 9 in.Disc sets the opening angle inside the ductHardware included as listedVerify duct...$16.99 -
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12 in. x 25 ft. Insulated Flexible HVAC Duct, R-8
$262.63Run insulated supply or return air duct with this 12 in. diameter x 25 ft. flexible duct rated R-8.Insulation rating: R-8Nominal length: 25 ft.Nominal duct diameter: 12 in.Confirm the required...$262.63 -
14 in. Sheet Metal Roof Pipe Flashing for Round Duct
$124.99Fit a 14 in. round duct roof penetration with this sheet metal pipe flashing.Nominal duct size: 14 in.Roof flashing for a round pipe penetrationVerify roof pitch, flashing base dimensions and...$124.99Qty in Cart: 0Quantity:Price:$124.99Subtotal: -
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14 x 14 in. Return Air Box Plenum for Grille
$54.99This 14 x 14 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 14 x 14 in.For a ceiling or floor return installationPair with a suitable start collar and return...$54.99 -
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18 x 16 x 16 in. Sheet Metal Duct T-Wye, 45° Branch
$197.00This 18 x 16 x 16 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 18 in. x 16 in. x 16 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$197.00 -
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5 in. Round Sheet Metal Duct End Cap
$19.99Close the end of an unused 5 in. round duct run with this sheet metal end cap.Nominal duct size: 5 in.For terminating compatible round ductworkCheck whether the cap fits inside or over your duct and...$19.99 -
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5 x 4 in. Round Sheet Metal Duct Reducer
$20.99Connect two different round duct sizes with this 5 x 4 in. sheet metal reducer.Nominal connection sizes: 5 in. and 4 in.For transitioning between compatible round HVAC ductsConfirm both connection...$20.99