This Comfort Glow direct vent natural gas wall heater is a space saving unit that provides the ideal solution for zone heating. With the included hardware this unit mounts to any exterior wall and the adjustable vent assembly adjusts to fit walls from 4-1/2 to 10 in thick. With the gas flame completely sealed inside, away from all contact with room air, this unit provides comfortable, clean heat when and where you want it. Doors and windows stay closed because no room air is used for combustion. All hardware required to install is included. NO electricity needed.Sealed burn system is ideal for bedrooms and living spacesSafety pilot with built in pressure regulator stops the flow of gas in the event the pilot is extinguishedStainless steel ported burner provides quiet operationMatchless piezo ignitionThermostatic Heat ControlSafety Pilot and Pressure Regulator Built-inCompletely Enclosed Combustion SystemNo Chimney Required Vents Directly Through Wall