Watch the video to see how it all works!
Cold air infiltration / warm air exfiltration through electrical boxes. Install air-tight LESSCO Air/Vapor Barrier Boxes. “The Perfect Addition to Create Air-Tight Electrical Boxes”. The new, improved LESSCO Air-Vapor Barrier Box has incorporated a unique “hinge” feature. In the past, certain electrical sidewall and ceiling boxes were difficult or impossible to use with the LESSCO AVB Box.