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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7 in. Tabbed Round Duct Start Collar, Snap-Together Sheet Metal
$11.99Add a 7 in. round duct takeoff with this tabbed, snap-together sheet metal start collar.Nominal duct size: 7 in.Tabbed mounting edgeSnap-together constructionConfirm opening size and the...$11.99 -
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12 in. x 36 in. Snap-Lock Round HVAC Duct Pipe
$79.99Build a straight round duct run with this 12 in. diameter, 36 in. long snap-lock sheet metal pipe.Nominal diameter: 12 in.Length: 36 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$79.99 -
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14 in. x 25 ft. Insulated Flexible HVAC Duct, R-8
$293.21Run insulated supply or return air duct with this 14 in. diameter x 25 ft. flexible duct rated R-8.Insulation rating: R-8Nominal length: 25 ft.Nominal duct diameter: 14 in.Confirm the required...$293.21 -
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9 in. x 60 in. Snap-Lock Round HVAC Duct Pipe
$123.99Build a straight round duct run with this 9 in. diameter, 60 in. long snap-lock sheet metal pipe.Nominal diameter: 9 in.Length: 60 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$123.99 -
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12 in. 45° Round Duct Saddle Tap, Sheet Metal Branch
$89.99Add a 12 in. 45° takeoff branch to a compatible round metal duct run with this sheet metal saddle tap.Nominal branch diameter: 12 in.Curved flange follows the main duct surfaceConnects a new branch...$89.99 -
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4 in. Round Duct Disc Damper with Hardware
$14.99Control airflow in a 4 in. round metal supply duct with this disc damper and hardware.Nominal duct diameter: 4 in.Disc sets the opening angle inside the ductHardware included as listedVerify duct...$14.99 -
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5 in. Adjustable 90 Round Sheet Metal Duct Elbow
$16.99Turn a 5 in. round HVAC duct run with this adjustable sheet metal elbow.Nominal diameter: 5 in.Adjusts from straight to a 90° bendSegmented 26-gauge steel, as listedSet the angle for your layout,...$16.99 -
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8 x 8 x 8 in. Galvanized Duct T-Wye, 45° Branch
$49.00This 8 x 8 x 8 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 8 in. x 8 in. x 8 in.Crimped outlet for joining compatible metal pipeUsed to branch air to another...$49.00 -
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10 in. Round Sheet Metal Duct End Cap
$26.99Close the end of an unused 10 in. round duct run with this sheet metal end cap.Nominal duct size: 10 in.For terminating compatible round ductworkCheck whether the cap fits inside or over your duct...$26.99 -
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16 x 16 x 14 in. Galvanized Duct T-Wye, 45° Branch
$154.00This 16 x 16 x 14 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 16 in. x 16 in. x 14 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$154.00 -
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12 x 10 x 8 in. Galvanized Duct T-Wye, 45° Branch
$89.00This 12 x 10 x 8 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 12 in. x 10 in. x 8 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$89.00 -
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4 x 3 in. Round Sheet Metal Duct Reducer
$19.99Connect two different round duct sizes with this 4 x 3 in. sheet metal reducer.Nominal connection sizes: 4 in. and 3 in.For transitioning between compatible round HVAC ductsConfirm both connection...$19.99