May be of no interest to anyone except the FL owners. If you have wondered were all the heat tubes go from your heater here is a picture. As you can see one goes straight up into the LR area and one goes to the belly that can't be seen here. The other three enter the floor duct. I disconnected one and still plenty of flow to the bedroom so I decided to install one supply to the bottom of the cabinet I am building since the kitchen area was always a bit colder by the fridg. Relocating the returns as not to suck all the hot air back in.
2014 Redwood 36FL and 2015 GMC Denali 3500 DW Duramax