The 16kW Guardian QuietSource is designed to provide enough power to start one 5-ton air conditioner or two 4-ton air conditioners and power 16 circuits in the home. Its Whisper-Test feature reduces operating noise by 50 percent during weekly self-testing cycles. The unit comes pre-packaged with a 100-amp automatic transfer switch with load center and other installation components. 800-333-1322. www.guardiangenerators.com.