For fireplace ambiance that's safer and less costly, the 30,000 Blue Flame Vent Free Heater is the answer. The blue flame will heat the air circling around the unit, with 30,000 BTUs of heat, and spread it up to 1,000 square feet using the principles of convection.It is easy to use, with a push-button spark ignition, and easy to install either on the floor or on a wall. Mounting hardware for both options is included with the heater. And you'll enjoy the fireside with a calm mind, knowing the heater's oxygen depletion sensor will keep you safe while keeping you warm. Coziness doesn't have to cost a fortune with the 30,000 Blue Flame Vent Free. Heats up to 1,000 square feet. Blue flame burner for even convection heat. For use with natural gas. Automatic low oxygen shut-off system (ODS). Can be wall mounted or freestanding (feet and mounting hardware included). 4,500 ft high altitude restriction.