Ideal for invisible, primary or supplemental comfort. Perfect for offsetting perimeter heat losses or providing primary heat to an entire space. Unit comes standard with 48 in. of 1/2 in. flexible metal conduit and J-Box connector. Insulation - Made of 1 in., 1 lb. density, high-temperature fiberglass. Galvanized or aluminized steel housing. All panels come standard with combination Earthquake/T-bar grip clips.