Schluter Systems 0.5 in x 32 in x 48 in Kerdi Board Polystyrene Foam Backer Board Whole Home Water Heater This model features sturdy magnesium This model features sturdy magnesium housing and a die cast magnesium footplate for true strength and a lifetime of reliable use Fixed Solar Panels Color Family Black Airflow (CFM) 750 Mounting Position Roof Mount Power Type Solar Powered Voltage (volts)2 24 Material Resin Horsepower (hp) 0 Net Free Area (Sq Waterproof and dimensionally stable Panel may be used for bonded waterproofing assemblies for tile with proper preparation of seams Extruded polystyrene foam panel Lightweight easy to handle and transport Contains no cement or fiberglass for a dust free installation Cut to size with a utility knife Fasten directly to studs with Kerdi Board screws and washers (sold separate) Panel measurements: 1 2 in (thick) x 32 in x 48 in