There are many factors that impact the sizing of the generator and appropriate fuel service. Most residential meters can accommodate 250,000 - 300,000 BTU. Accommodation must be made for additional NG appliances such as a hot water heater, dryer, etc. You might have to upgrade the meter to meet both the generator and other appliance demands.
Reference the fuel consumption on the 20kW spec sheet at http://www.generac.com/SpecSheets/0...
Contact the local utility, and an authorized Generac Dealer located near you for more detailed information.
Use our dealer locator at http://www.generac.com/Service/Deal...
answered 2 years, 8 months ago