HB64ROOF: 120 Volt - 1440 Watt - 12 Amps. The Powerblanket HB64ROOF Roofers Hot Box heater comes standard with an internal preset fixed thermostat which maintains an internal maximum temperature as high as 120°F. The HB64ROOF is fully insulated so it retains heat in extreme weather conditions. Save time and money by protecting your roofing shingles, adhesives, equipment, and materials from freezing without the risk of overheating. Heats pallets of shingles or roofing materials all at once. Works great for heating pallets of bulk material with heated dimensions of 4' X 4' x 4'. Whether you need a means for protecting temperature-sensitive materials in storage, or you need a heating solution for onsite temperature maintenance, the Powerblanket Roofers Hot Box is the answer for you. Go ahead and put your compressor, adhesives, shingles, and all other roofing equipment inside, it has room for it and this Roofers Hot Box will keep them nice and toasty. This versatile heating solution accommodates remote-location use, job site heating, the transporting of temperature-sensitive material, and much more. This Powerblanket product is ETL certified to UL/CSA/CE safety standards.