The MH25LP is a propane fired, high intensity infrared garage/shop . This unit is wall mounted and is controlled thermostatically via a power pile system. No is required for operation. The MH25NG will effectively heat a standard 2-1/2 car garage or up to 600 Sq. Ft. this CSA certified comes with a 1 year warranty on the controls and a 5 year pro-rated warranty on the burner.