Briggs & Stratton 40396 20000-Watt Home Standby Generator System with Dual 200 Amp/Split 400 Amp Automatic Transfer Switch Includes dual 200 amp automatic transfer switch with flexible indoor/outdoor installation This 20kW with Symphony II Power Management can manage your home, up to 12,000 square feet with a 5-ton air conditioner saving you thousands less than a previously required larger, liquid cooled unit Closer placement options as close as 18 in. from your home per the National Fire Protection Agency 37 standard Comprehensive 5-year parts, labor, and travel limited warranty