Low-Profile Cover That Forces Air Directly Through the Vapor Pad at its Warmest Point;Stainless steel distributor tube for cold or hot water supply;Redesigned cover and chassis to direct hot furnace air directly through the Vapor Pad;Reduced Vapor Pad frame for maximum pad exposure;Left or right bypass installation option;Left or right solenoid valve installation option;Snap-in-Place, Easy Lift-Off Cover;Sturdy Two-Piece Vapor Pad Frame That Easily Pulls Apart to Release & Replace the Vapor Pad