Dual fuel technology allows the unit to be operated with Liquid Propane or Natural Gas. Blue Flame Technology works by convecting heat to warm the air the same way as a central heating system. Up to 10,000 BTU's/hr heats up to 300 sq ft. Thermostat control knob automatically maintains your ideal heat level. No electricity required allows for reliable back-up heating incase of an emergency situation.The item "Dyna-Glo 10000 Wall Or Floor Mount Indoor natural gas or propane Ventless Heater" is in sale since Friday, February 26, 2021. This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Heating & Cooling Appliances\Space Heaters". The seller is "cartermann" and is located in Jacksonville, Florida. This item can be shipped to United States.