It depends. If money is no concern, then Cummins or Kohler. Do they have, or in the future may have medical conditions that need constant power? Cummins or Kohler. Are they somewhere with frequent power disruptions? Cummins or Kohler. See the pattern?Looking into have a natural gas generator installed at my parents' home.
The choices are Generac, Cummins, and Kohler.
What are your recommendations?
The generac commercial series are abit of a different animal. But they also put you into a price point that's Cummins or Kohler territory..In an industrial setting (e.g., units probably twice as big as the typical home installation), we never had a Generac fail. Just perform the annual maintenance. But that experience is probably not as big a sample size as I's.