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...
230V Swamp Cooler Electrical Plug Junction BoxFor most standard evaporative coolers other than Adobeair Mastercool.(Picture shown if for 115 volt box. 230 volt box has the correct pump plug)...