An earlier post said they were glad Jayco started offering gas generators on fifth wheels. I didn't know they had stopped as my 2010 Designer has a gas Onan 5500.
Works great, 10 gallon fuel tank and a it over 300 hours on it so far.
The exhaust exits out the driver's side just behind the bed slide. It does have a metal heat shield between the exhaust and the underside of trailer.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof