Enerco’s new Heatstar HD Enerco’s new Heatstar HD forced-air heater line is designed for rugged on-site use, featuring heavy-duty high-output fans, 10-inch pneumatic tires, and large capacity fuel tanks. Offered in sizes ranging from 50,000 to more than 610,000 BTUs, the forced-air heater line comprises seven heaters consisting of two compact units, three wheeled units, and two large direct-fired heaters with the power to heat up to 114,000 square feet. All Heatstar HD multi-fuel heaters operate using kerosene, No.1 or No. 2 diesel, or JP8 or Jet A fuel, and will operate in sub-zero temperatures.