Hi, am new to the forum, but always read with interest. We have ordered a 21-64 OB after selling our swan which hasd served us well since 2009. I have been researching different aircon units to go in to the expanda. At the moment we have the Coleman Mach 8 going into it, as we were told it will work great on our trips that we do north. ( we go to monkey mia in Jan and coral bay in April). We prefer going to warm/hot areas rather than cold, so the heating part isn't as important. Since they aren't cheap we don't want to make a mistake in choice. Any assistance would be appreciated greatly.