Cummins Onan RS20 20 kW GeneratorThe RS20A residential generator uses Cummins Onan patented double-walled sound dampening technology. The double-walled generator design utilizes long air-flow paths and acoustic chambers to provide the lowest sound level ever offered in its class - all with the end user and neighbors in mind. Other manufacturers rely on a single wall design that does little to curtail unwanted noise and ultimately result in harsher tones and higher noise levels.
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