Improve the efficiency of home HVAC units and water heaters with this AYR™ foil insulation. Its effective heat-blocking and thermal-retention qualities ensure an energy-efficient home. Use this aluminum, water-pipe insulation around plumbing assemblies, hot-water heaters and air ducts to save energy and cut utility bills. In cold climates, encase pipes with this foil covering to prevent them from freezing. Each roll measures 4 ft x 125 ft, so it can cover different areas of the home, including crawl spaces and walls. Since the wall insulation is lightweight and easy to cut into desired sizes, it's a practical consideration for DIY projects. It works as a vapour barrier and protects basement walls and ductwork from the damaging effects of moisture.