A baby cow is called a calf. Adult male cows are called bulls. Adult female cows are called heifers until they give birth; after they have given birth, they are called cows.
As long as there is a fuel supply of natural gas or propane, a well-maintained backup generator will keep running. If the Generac generator is running on propane, with a 500-gallon tank, it should run 24 hours a day for over a week. How loud are they? Generac generators are very quiet.
See all results for generac natural gas generator. 1  Generac 6729 Guardian Series, 20kW Air Cooled Standby Generator, Natural Gas/Liquid Propane Powered, Steel Enclosed... by Generac. 2  Generac Guardian Series 5871 10,000 Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator With... by Generac.