Generac 5871 10/9KW Stand Generator, 10/9KW, Air Cooled Stand By Generator, Nexus Controller, Powers 12 Circuits Of Your Home Or Business Such As Furnace, Water Heater, Kitchen, Including Refrigerator, Bathroom, Bedroom, Sump Pump, Family Room, True Power Technology Provides Safe Operation Of Sensitive Electronic Equipment & Appliances, Easiest Installation With The Pre-Wired, Pre-Packaged 100A, NEMA 1, Indoor Rated Only, Automatic Transfer Switch, Generacs OHVI Industrial Engine Designed Specifically For High Demand Generator Applications, Offers Full Pressure Lubrication To Ensure Instant, Total Lubrication To Vital Parts,Unit Can Be Powered By Propane Or Natural Gas Fuel Type & Comes Pre-Set At The Factory For Natural Gas, With The Option Of Resetting To LP At The Time Of Installation, Meets Ieee/Utility Standards,