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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36 in. Nylon Cable Tie Strap for Flexible Duct
$0.89Secure flexible duct to a compatible metal fitting with this 36 in. nylon cable tie strap.Length: 36 in.Tooth-and-gear closureListing recommends one strap for ducts 10 in. and smaller, and at least...$0.89 -
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12 in. Round Sheet Metal Flexible Duct Connector
$20.99Join a 12 in. flexible duct run to compatible sheet metal ductwork with this round connector.Nominal connection size: 12 in.Sheet metal fitting for a flexible duct connectionConfirm the connector...$20.99 -
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6 x 6 x 4 in. Ceiling Register Box, 4 in. Round Duct Connection
$23.99Connect a 6 x 6 in. register opening to 4 in. round HVAC supply duct with this ceiling register box.Register opening: 6 x 6 in.Round duct connection: 4 in.Sheet metal register bootMeasure the...$23.99 -
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10 in. Round Sheet Metal Flexible Duct Connector
$19.49Join a 10 in. flexible duct run to compatible sheet metal ductwork with this round connector.Nominal connection size: 10 in.Sheet metal fitting for a flexible duct connectionConfirm the connector...$19.49 -
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10 x 10 x 6 in. Galvanized Duct T-Wye, 45° Branch
$68.00This 10 x 10 x 6 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 10 in. x 10 in. x 6 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$68.00 -
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14 in. Round Sheet Metal Flexible Duct Connector
$21.99Join a 14 in. flexible duct run to compatible sheet metal ductwork with this round connector.Nominal connection size: 14 in.Sheet metal fitting for a flexible duct connectionConfirm the connector...$21.99 -
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20 in. Round Sheet Metal Flexible Duct Connector
$29.99Join a 20 in. flexible duct run to compatible sheet metal ductwork with this round connector.Nominal connection size: 20 in.Sheet metal fitting for a flexible duct connectionConfirm the connector...$29.99 -
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7 in. Round Sheet Metal Flexible Duct Connector
$17.59Join a 7 in. flexible duct run to compatible sheet metal ductwork with this round connector.Nominal connection size: 7 in.Sheet metal fitting for a flexible duct connectionConfirm the connector...$17.59 -
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16 in. Round Sheet Metal Flexible Duct Connector
$24.99Join a 16 in. flexible duct run to compatible sheet metal ductwork with this round connector.Nominal connection size: 16 in.Sheet metal fitting for a flexible duct connectionConfirm the connector...$24.99 -
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30 x 20 in. Return Air Box Plenum for Grille
$89.99This 30 x 20 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 30 x 20 in.For a ceiling or floor return installationPair with a suitable start collar and return...$89.99 -
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16 in. x 36 in. Snap-Lock Round HVAC Duct Pipe
$130.99Build a straight round duct run with this 16 in. diameter, 36 in. long snap-lock sheet metal pipe.Nominal diameter: 16 in.Length: 36 in.Ships flat/unsnapped for assembly at the jobsiteSnap together,...$130.99 -
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18 in. Tabbed Round Duct Start Collar, Snap-Together Sheet Metal
$18.99Add a 18 in. round duct takeoff with this tabbed, snap-together sheet metal start collar.Nominal duct size: 18 in.Tabbed mounting edgeSnap-together constructionConfirm opening size and the...$18.99