The Dyna-Glo Delux EcoMax 220,000/180,000 BTU Portable Kerosene Forced Air Heater is ideal for indoor/outdoor construction sites, as well as industrial and commercial applications, making it an excellent choice for your portable heating needs. It requires minimal assembly, is 98% fuel efficient, and heats areas up to 5,200 sq. ft. The KFA220DGD-LD includes a High/Low BTU switch for adjustable heat output, 10" flat-free wheels, comfort control thermostat with a digital LED display, runtime fuel gauge, convenient cord wrap, operating indicator light and more. Save on fuel with Dyna-Glo's patented EcoMax technology, which helps reduce fuel consumption while delivering extended operation—up to 10 hours of runtime on the low setting and up to 8 hours on the high setting from a single tank. All Dyna-Glo Delux Kerosene Forced Air Heaters are CSA certified for multi-fuel use with K1 Kerosene, Diesel #1, Diesel #2, Fuel Oil #1, Fuel Oil #2, Jet A, and JP-8 fuels. However, K1 Kerosene is the manufacturer's recommended fuel for cleaner combustion and longer product life.