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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14 x 14 x 12 in. Galvanized Duct T-Wye, 45° Branch
$99.00This 14 x 14 x 12 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 14 in. x 14 in. x 12 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$99.00 -
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18 in. Round Sheet Metal Flexible Duct Connector
$28.99Join a 18 in. flexible duct run to compatible sheet metal ductwork with this round connector.Nominal connection size: 18 in.Sheet metal fitting for a flexible duct connectionConfirm the connector...$28.99 -
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12 x 12 x 6 in. Galvanized Duct T-Wye, 45° Branch
$89.00This 12 x 12 x 6 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 12 in. x 12 in. x 6 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$89.00 -
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14 x 14 x 14 in. Galvanized Duct T-Wye, 45° Branch
$99.00This 14 x 14 x 14 in. sheet metal T-wye adds a 45° branch to a round HVAC duct run.Nominal openings: 14 in. x 14 in. x 14 in.Crimped outlet for joining compatible metal pipeUsed to branch air to...$99.00 -
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24 x 12 in. Return Air Box Plenum for Grille
$72.99This 24 x 12 in. return air box forms a plenum behind a compatible return grille.Nominal face size: 24 x 12 in.For a ceiling or floor return installationPair with a suitable start collar and return...$72.99 -
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12 in. Tabbed Round Duct Start Collar, Snap-Together Sheet Metal
$14.99Add a 12 in. round duct takeoff with this tabbed, snap-together sheet metal start collar.Nominal duct size: 12 in.Tabbed mounting edgeSnap-together constructionConfirm opening size and the...$14.99 -
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6 in. Adjustable 90 Round Sheet Metal Duct Elbow
$18.99Turn a 6 in. round HVAC duct run with this adjustable sheet metal elbow.Nominal diameter: 6 in.Adjusts from straight to a 90° bendSegmented 26-gauge steel, as listedSet the angle for your layout,...$18.99 -
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10 x 10 x 6 in. Ceiling Register Box, 6 in. Round Duct Connection
$31.99Connect a 10 x 10 in. register opening to 6 in. round HVAC supply duct with this ceiling register box.Register opening: 10 x 10 in.Round duct connection: 6 in.Sheet metal register bootMeasure the...$31.99 -
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12 x 12 x 10 in. Side-Outlet Ceiling Register Box, 10 in. Round Duct Connection
$83.99Connect a 12 x 12 in. register opening to 10 in. round HVAC supply duct with this side-outlet ceiling register box.Register opening: 12 x 12 in.Round duct connection: 10 in.Side outletMeasure the...$83.99 -
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20 x 8 x 8 in. Wall or Floor Register Box, 8 in. Round Duct Connection
$79.99Connect a 20 x 8 in. register opening to 8 in. round HVAC supply duct with this wall or floor register box.Register opening: 20 x 8 in.Round duct connection: 8 in.Sheet metal register bootMeasure the...$79.99 -
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12 x 8 x 8 in. Wall or Floor Register Box, 8 in. Round Duct Connection
$36.99Connect a 12 x 8 in. register opening to 8 in. round HVAC supply duct with this wall or floor register box.Register opening: 12 x 8 in.Round duct connection: 8 in.Sheet metal register bootMeasure the...$36.99 -
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10 x 10 x 9 in. Ceiling Register Box, 9 in. Round Duct Connection
$31.99Connect a 10 x 10 in. register opening to 9 in. round HVAC supply duct with this ceiling register box.Register opening: 10 x 10 in.Round duct connection: 9 in.Sheet metal register bootMeasure the...$31.99