Up to 20% more fuel efficient than leading competitors, this 22-kilowatt generator provides 22,000 watts of continuous power on propane and 19,800 watts on natural gas, with no refueling, no manual operation, and no extension cords needed With less wiring and lower installation costs thanks to our Power Line Carrier technology, you’ll save time and money installing your new HSB, easily manage your high-demand appliances with aXis technology, plus advanced airflow design extends engine life Thanks to advanced sound dampening and a specially designed low-tone muffler, this generator operates at a residential-friendly 67 dBA noise level and performs self-diagnostic tests 24-volt starting system operates in sub-zero or extreme heat (between -22° F and 104° F) with aluminum-zinc coated steel for weatherproofing and oxidation-resistance Includes 10-year limited warranty with FREE lifetime technical support from dedicated experts