Return Air Boxes
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12 X 12 Return Air Box Can HVAC Plenum
$45.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.$45.99 -
24 X 24 Return Air Box Can HVAC Plenum
$79.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30...$79.99 -
24 X 12 Return Air Box Can HVAC Plenum
$61.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30 gauge...$61.99 -
20 X 14 Return Air Box Can HVAC Plenum
$59.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30 gauge...$59.99 -
20 X 16 Return Air Box Can HVAC Plenum
$62.00Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30 gauge...$62.00 -
25 X 16 Return Air Box Can HVAC Plenum
$79.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30 gauge...$79.99 -
20 X 12 Return Air Box Can HVAC Plenum
$61.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30 gauge...$61.99 -
25 X 14 Return Air Box Can HVAC Plenum
$65.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30 gauge...$65.99 -
20 X 20 Return Air Box Can HVAC Plenum
$66.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30 gauge...$66.99 -
25 X 20 Return Air Box Can HVAC Plenum
$77.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30 gauge...$77.99 -
30 X 20 Return Air Box Can HVAC Plenum
$81.99Free Shipping to Continental US | Return air box is a plenum for attaching return duct to return grille in ceiling or floor. Use with start collar and return filter frame to provide return air flow from house to air unit.Sheet metal will come in 30 gauge...$81.99