The Dyna-Glo Delux 150,000 BTU portable natural gas fired heaters are strong and efficient heating solutions that will cover an area up to 3,500 square feet. Equipped with a thermostat adjustable between 35 and 95 degrees F, you can achieve thermal comfort while keeping fuel usage to a minimum. The built in auto fuel shut-off allows you to setup, ignite and let it run with confidence that you, your project and space are safe.