Briggs & Stratton 40302 12, 000 Watt IntelliGen Natural Gas/Liquid Propane Powered Air Cooled Home Standby Generator Fully automatic advanced electronics will detect a utility power outage and automatically start the generator whether you are home or away Sound shield technology engineered air passages, an automotive-style exhaust system and acoustic foam dampeners ensure quiet operation All-climate enclosure features heat/rust proof polymer vents and louvers, rounded corners for years of durable outdoor protection; CARB compliant Overload protection; central air technology; remote system status; turnkey extras; galvanized steel and military grade paint Measures 49.7-inches in length by 33.75-inches in width by 31.6-inches in height; 4 year warranty