The Dyna-Glo Delux 140,000-180,000 BTU Portable Kerosene Forced Air Heater is ideal for outdoor/indoor construction, as well as industrial and commercial applications, making it an excellent choice for your portable heating needs. It require little to no assembly, is 98% fuel efficient, and covers areas up to 4,200-sq ft. Two heat settings at 140K BTUs and 180K BTUs for two heaters in one. Included are self-diagnostics, a thermostat, LED readout and cord wrap. All Dyna-Glo Delux Kerosene Forced Air Heaters are CSA certified for multi-fuel use with these fuel types: K1 Kerosene, Diesel #1, Diesel #2, Fuel Oil #1, Fuel Oil #2, Jet A and JP-8. However, K1 Kerosene is the manufacturer's recommended fuel for optimal, cleaner burns and long lasting product life. Color: Gray.