Just now listing our 2022 Newmar New Aire 3543, has all the bells and whistles. I have had it updated at the factory to fix the dreaded air flow problem back air conditioning air flow. Had the engine compartment insulated with extra insulation. Garage kept since new,generator has 228 hrs. I had Cummins do a complet service on engine and generator,oil and filter, diesel fuel filters. Also had the air filter changed. They did an inspection on the chassis on the Spartan chassis