ProCom's Blue Flame Ventless Indoor Gas Space Heaters make supplemental heating fast and easy! Just push a button for easy ignition, stand back and enjoy a great source of dependable, affordable heat. These new blue flame gas heaters heat the air first, circulating the warmth through the room, much like your central heating system. Thermostat Control Allows you to set the thermostat to your ideal comfort level. No electricity required!