Don't let a heater limit where and when you work, get the DEWALT® Cordless Propane 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!