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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4 x 4 x 4 in. Galvanized Duct T-Wye, 45° Branch
$30.00This 4 x 4 x 4 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 4 in. x 4 in. x 4 in.Crimped outlet for joining compatible metal pipeUsed to branch air to another...$30.00 -
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9 x 7 in. Round Sheet Metal Duct Reducer
$27.99Connect two different round duct sizes with this 9 x 7 in. sheet metal reducer.Nominal connection sizes: 9 in. and 7 in.For transitioning between compatible round HVAC ductsConfirm both connection...$27.99 -
14 x 12 x 10 in. Galvanized Duct T-Wye, 45° Branch
$99.00This 14 x 12 x 10 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 14 in. x 12 in. x 10 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$99.00 -
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16 x 14 x 14 in. Galvanized Duct T-Wye, 45° Branch
$154.00This 16 x 14 x 14 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 16 in. x 14 in. x 14 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$154.00 -
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5 x 3 in. Round Sheet Metal Duct Reducer
$20.99Connect two different round duct sizes with this 5 x 3 in. sheet metal reducer.Nominal connection sizes: 5 in. and 3 in.For transitioning between compatible round HVAC ductsConfirm both connection...$20.99 -
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6 in. Round Sheet Metal Duct End Cap
$21.99Close the end of an unused 6 in. round duct run with this sheet metal end cap.Nominal duct size: 6 in.For terminating compatible round ductworkCheck whether the cap fits inside or over your duct and...$21.99 -
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9 in. 45° Round Duct Saddle Tap, Sheet Metal Branch
$61.99Add a 9 in. 45° takeoff branch to a compatible round metal duct run with this sheet metal saddle tap.Nominal branch diameter: 9 in.Curved flange follows the main duct surfaceConnects a new branch to...$61.99 -
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9 in. x 25 ft. Insulated Flexible HVAC Duct, R-6
$142.51Run insulated supply or return air duct with this 9 in. diameter x 25 ft. flexible duct rated R-6.Insulation rating: R-6Nominal length: 25 ft.Nominal duct diameter: 9 in.Confirm the required...$142.51 -
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9 x 8 in. Round Sheet Metal Duct Reducer
$27.99Connect two different round duct sizes with this 9 x 8 in. sheet metal reducer.Nominal connection sizes: 9 in. and 8 in.For transitioning between compatible round HVAC ductsConfirm both connection...$27.99 -
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10 in. x 25 ft. Insulated Flexible HVAC Duct, R-6
$153.14Run insulated supply or return air duct with this 10 in. diameter x 25 ft. flexible duct rated R-6.Insulation rating: R-6Nominal length: 25 ft.Nominal duct diameter: 10 in.Confirm the required...$153.14 -
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12 in. x 60 in. Snap-Lock Round HVAC Duct Pipe
$137.99Build a straight round duct run with this 12 in. diameter, 60 in. long snap-lock sheet metal pipe.Nominal diameter: 12 in.Length: 60 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$137.99 -
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12 x 9 in. Round Sheet Metal Duct Reducer
$31.99Connect two different round duct sizes with this 12 x 9 in. sheet metal reducer.Nominal connection sizes: 12 in. and 9 in.For transitioning between compatible round HVAC ductsConfirm both connection...$31.99