Our heating technology is considered 100% efficient vs 92% for the quartz style heaters. To accomplish this high level of efficiency we had to incorporate high rpm ball bearing fans capable of delivering 110 CFM (twice the airflow of some competitiors). The anodized aircraft aluminum housing is over 5x thicker that the competition and is extremely rugged.If you are searching for a high quality heater, that will last for years to come look no further. This is the best heater on the market! The heater will deliver 620 watts (+/- 10%) of heat when connected to a running vehicle but can be modified to deliver either 412 or 206 watts by disconnecting either one or two of the wires on the side of the heater. This heater MUST BE hardwired using #6 wire. Dimensions 4"W x 4.25"H X 8L (outside bracket). The item "HORNET 45 12V HEATER Bobcat Skid Steer Enclosure Cab Cabin 12 volt electric" is in sale since Tuesday, August 22, 2017. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\12-Volt Portable Appliances". The seller is "designstein" and is located in San Angelo, Texas. This item can be shipped to United States.