Briggs & Stratton 40303 15,000 Watt IntelliGen Natural Gas/Liquid Propane Powered Air Cooled Home Standby Generator Generators have an automotive-style exhaust system and acoustic foam dampeners to ensure 50-percent quieter operation than most portable generators Air-cooled standby generator has advanced electronics to detect a power outage and automatically start the generator whether you are home or away All-climate enclosure features heat/rust proof polymer vents and louvers, rounded corners for years of durable outdoor protection Contemporary, space-saving design features steel; automotive paint for maximum durability and all-weather protection; overload protection Measures 48.7-inches in length by 33.75-inches in width by 31.6-inches in height; 4 year warranty