Mr. Heater MH25NG 25,000-BTU Natural-Gas Radiant Heater 25,000-BTU natural-gas radiant workshop heater Heats up to 625 square feet Efficient radiant heat warms objects directly, not surrounding air Comes fully assembled; hooks up to existing natural-gas line; how-to video included Non-corrosive materials used throughout construction. 1-year limited warranty