Heat you can take anywhere. - Don't let a heater limit where and when you work, get the DEWALT Cordless Forced-air Heater. It runs on batteries and is built to take the chill out of remote workspaces and spaces without power. And the variable 27-68,000 BTU settings ensure you get the temperature just right. You won't overheat while you work! Of course it's quiet and odorless and can heat an area up to 1,500 sq. ft. for up to 20 hours. You'll bring the heat any time, anywhere without constraints with this portable battery-powered unit! Hybrid power design Blower can be powered by DEWALT 20V MAX and FLEXVOLT batteries (not included) or AC power; Variable 27-68,000 BTU settings; 2.5 to 20-hour runtime depending on settings; Runs on 20-lb. propane tank; Quiet burner technology; 2-piece barrel design for easy maintenance; Steel construction for durability; Features glove friendly handle for easy portability; Hose regulator included; BTU Rating: Up to 68,000 BTU; Heating Area: Up to 1,500 sq. ft.; Burn Time: 2.5 hrs. at 1.5 Ah, 3.5 hrs. at 2.0 aH, 5.5 hrs. at 3.0 aH, 7.0 hrs. at 4.0 aH, 9.5 hrs. at 5.0 aH, 20 hrs. at 6.0 aH.; Fuel Type: Propane; Tank Size: 20 gal.; Temperature Control: Thermostat; Measures: 19.72" x 17.8" x 11.85"h.; Weighs: 34 lbs.; Mfg. Number: DXH70CFA.