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. Multi-Pitch Evaporative Cooler Roof Jack with Slide Damper
$153.38Route air through the roof with this 20 in. multi-pitch evaporative cooler roof jack.Nominal duct size: 20 in.Listed for flat through 6/12 roof pitchesSliding damper included; slot for optional...$153.38 -
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6 x 6 x 5 in. Ceiling Register Box, 5 in. Round Duct Connection
$23.99Connect a 6 x 6 in. register opening to 5 in. round HVAC supply duct with this ceiling register box.Register opening: 6 x 6 in.Round duct connection: 5 in.Sheet metal register bootMeasure the...$23.99 -
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12 x 12 x 12 in. Side-Outlet Ceiling Register Box, 12 in. Round Duct Connection
$87.99Connect a 12 x 12 in. register opening to 12 in. round HVAC supply duct with this side-outlet ceiling register box.Register opening: 12 x 12 in.Round duct connection: 12 in.Side outletMeasure the...$87.99 -
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14 in. Adjustable 90 Round Sheet Metal Duct Elbow
$66.99Turn a 14 in. round HVAC duct run with this adjustable sheet metal elbow.Nominal diameter: 14 in.Adjusts from straight to a 90° bendSegmented 26-gauge steel, as listedSet the angle for your layout,...$66.99 -
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20 x 16 in. Round Sheet Metal Duct Reducer
$71.99Connect two different round duct sizes with this 20 x 16 in. sheet metal reducer.Nominal connection sizes: 20 in. and 16 in.For transitioning between compatible round HVAC ductsConfirm both...$71.99 -
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16 in. x 25 ft. Insulated Flexible HVAC Duct, R-8
$361.87Run insulated supply or return air duct with this 16 in. diameter x 25 ft. flexible duct rated R-8.Insulation rating: R-8Nominal length: 25 ft.Nominal duct diameter: 16 in.Confirm the required...$361.87 -
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6 x 4 in. Round Sheet Metal Duct Reducer
$23.99Connect two different round duct sizes with this 6 x 4 in. sheet metal reducer.Nominal connection sizes: 6 in. and 4 in.For transitioning between compatible round HVAC ductsConfirm both connection...$23.99 -
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18 x 16 in. Round Sheet Metal Duct Reducer
$62.99Connect two different round duct sizes with this 18 x 16 in. sheet metal reducer.Nominal connection sizes: 18 in. and 16 in.For transitioning between compatible round HVAC ductsConfirm both...$62.99 -
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16 x 12 in. Round Sheet Metal Duct Reducer
$52.99Connect two different round duct sizes with this 16 x 12 in. sheet metal reducer.Nominal connection sizes: 16 in. and 12 in.For transitioning between compatible round HVAC ductsConfirm both...$52.99 -
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8 x 6 in. Round Sheet Metal Duct Reducer
$26.99Connect two different round duct sizes with this 8 x 6 in. sheet metal reducer.Nominal connection sizes: 8 in. and 6 in.For transitioning between compatible round HVAC ductsConfirm both connection...$26.99 -
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7 in. 45° Round Duct Saddle Tap, Sheet Metal Branch
$54.99Add a 7 in. 45° takeoff branch to a compatible round metal duct run with this sheet metal saddle tap.Nominal branch diameter: 7 in.Curved flange follows the main duct surfaceConnects a new branch to...$54.99Qty in Cart: 0Quantity:Price:$54.99Subtotal: -
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10 x 10 x 10 in. Side-Outlet Ceiling Register Box, 10 in. Round Duct Connection
$70.99Connect a 10 x 10 in. register opening to 10 in. round HVAC supply duct with this side-outlet ceiling register box.Register opening: 10 x 10 in.Round duct connection: 10 in.Side outletMeasure the...$70.99