Generac's Guardian Series generators provide the automatic backup power you need to protect your home and family during a power outage. Connected to your existing LP or natural gas fuel supply, it kicks in within seconds of sensing power loss-automatically-and runs for as long as necessary until utility power returns. Choose from just enough power to cover essential circuits, or all the way up to 22 kW for the most power per kilowatt and whole-house coverage. The 22 kW Guardian Series home standby generator is the largest air cooled home standby generator on the market. Not only does it deliver all the features and functionality customers have come to expect from the market leading brand of home standby generators, but with an MSRP that is the lowest cost per kilowatt of any air-cooled home standby generator. Provides whole house coverage for many homes.