Generac QT02224ANAN QuietSourceSeries 22, 000-Watt Liquid-Cooled Propane/Natural Gas Powered Home Automatic Standby Generator with Aluminum Enclosure (Discontinued by Manufacturer) Automotive-style, liquid-cooled engine operates at low speeds for reduced sound output and longer life Runs on clean-burning natural gas or LP Patented Quiet-Test low speed exercise mode Aluminum all-weather enclosures with RhinoCoatpaint finish are corrosion resistant and ideal for salt-air coastal areas This item is CARB Compliant