The RV version of 220V 50amp is a little different. None of the appliances run on 220v. The legs are split off to power different 110v zones.

Camping World has the adapters. I run my 50amp fifth wheel on my 110v 20amp all the time. I am very careful not to run too many things at once. You can probably run the Air by itself, but only one. If you have dual air don't try to run both at the same time. I mostly use it for the internal battery charger/converter to keep the 12v batteries charged. I keep the refer on gas and only run 12v lights.