Description
Free 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.
Free 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.