I am talking about a 2011 Airstream Interstate class B which comes with a 13.5 a/c unit without a heat pump. Sorry I didn't make that very clear. The Interstate is so expensive but most everything is included and of a higher quality than the usual Airstream choices.
Is there a downside to having a 13,500 BTU heat pump? Possibly a larger startup draw which the on-board Onan generator couldn't handle or is this the usual Airstream decision which defies logic?
The same questions come up regarding the 15,000 BTU heat pump. Lew said the wiring is ok to go to a 15K from a 13.5K. So why doesn't Airstream always offer an upgrade to a 15,000 BTU unit? I doubt that the Interstate is any better insulated than the Airstream trailer line.
I may be wrong but I would like to hear from anyone that has an Interstate that is comfy with a 13.5K unit sitting in full sun on a typical 102 degree day in Texas.