The Cummins Quiet Connect Series 13-18kW Air-Cooled Standby Generator is the perfect power backup during an outage. It is powered by a 999 cc engine which runs from 13 to 20 kilowatts both on natural or propane gas. The engine has a total harmonic distortion of 5% and has the ability to start and run a 5-ton A/C under full preload. It features an air-cooled cooling system with extremely quiet operation at a 65-decibel rating. This generator has the “Crank-Only” mode which reduces wear and tear while saving fuel and reducing noise. This can operate in cold weather out of the box.