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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10 in. x 25 ft. Insulated Flexible HVAC Duct, R-8
$231.39Run insulated supply or return air duct with this 10 in. diameter x 25 ft. flexible duct rated R-8.Insulation rating: R-8Nominal length: 25 ft.Nominal duct diameter: 10 in.Confirm the required...$231.39 -
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18 x 14 in. Round Sheet Metal Duct Reducer
$62.99Connect two different round duct sizes with this 18 x 14 in. sheet metal reducer.Nominal connection sizes: 18 in. and 14 in.For transitioning between compatible round HVAC ductsConfirm both...$62.99 -
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10 x 6 in. Round Sheet Metal Duct Reducer
$27.99Connect two different round duct sizes with this 10 x 6 in. sheet metal reducer.Nominal connection sizes: 10 in. and 6 in.For transitioning between compatible round HVAC ductsConfirm both connection...$27.99 -
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10 x 8 x 8 in. Galvanized Duct T-Wye, 45° Branch
$68.00This 10 x 8 x 8 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 10 in. x 8 in. x 8 in.Crimped outlet for joining compatible metal pipeUsed to branch air to another...$68.00 -
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14 x 6 x 6 in. Wall or Floor Register Box, 6 in. Round Duct Connection
$43.99Connect a 14 x 6 in. register opening to 6 in. round HVAC supply duct with this wall or floor register box.Register opening: 14 x 6 in.Round duct connection: 6 in.Sheet metal register bootMeasure the...$43.99 -
18 in. Evaporative Cooler Pyramid Diffuser with Hanging Straps
$108.99Distribute air from a 18 in. evaporative cooler duct connection with this pyramid diffuser.Nominal connection size: 18 in.Hanging straps listed as includedConfirm the inlet dimension, mounting height...$108.99Qty in Cart: 0Quantity:Price:$108.99Subtotal: -
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8 in. Round Duct Disc Damper with Hardware
$16.99Control airflow in a 8 in. round metal supply duct with this disc damper and hardware.Nominal duct diameter: 8 in.Disc sets the opening angle inside the ductHardware included as listedVerify duct...$16.99 -
Silver Mylar Duct Tape DC-181, 2 in. x 120 yd.
$17.99Seal compatible duct joints with silver Mylar duct tape sized 2 in. wide by 120 yd. long.Silver film finish matches foil-backed flex ductHigh-tack acrylic adhesive listedConforms to irregular...$17.99Qty in Cart: 0Quantity:Price:$17.99Subtotal: -
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14 in. Round Sheet Metal Duct End Cap
$34.99Close the end of an unused 14 in. round duct run with this sheet metal end cap.Nominal duct size: 14 in.For terminating compatible round ductworkCheck whether the cap fits inside or over your duct...$34.99 -
18 in. Multi-Pitch Evaporative Cooler Roof Jack with Slide Damper
$141.59Route air through the roof with this 18 in. multi-pitch evaporative cooler roof jack.Nominal duct size: 18 in.Listed for flat through 6/12 roof pitchesSliding damper included; slot for optional...$141.59 -
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20 x 12 in. Return Air Box Plenum for Grille
$56.99This 20 x 12 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 20 x 12 in.For a ceiling or floor return installationPair with a suitable start collar and return...$56.99 -
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10 x 10 x 8 in. Ceiling Register Box, 8 in. Round Duct Connection
$31.99Connect a 10 x 10 in. register opening to 8 in. round HVAC supply duct with this ceiling register box.Register opening: 10 x 10 in.Round duct connection: 8 in.Sheet metal register bootMeasure the...$31.99