[Richard and Rhonda]

Te Dometic basement units are build much as a house unit. The compressor and condenser are in the basement (outside) and the evaporator are inside. The SCS units are quite different as Tuga pointed out. They are self contained units where everything is in one package and air is pulled from the coach, circulated through the unit and returned to the coach.

There are some clues in Tuga's post about how one might get the best performance out of the system. In general, make sure there are no air restrictions in either the return or the supply side. Two, make sure the air ducts are as insulated as possible and don't have leaks.

Newell didn't do a great job filtering the AC air, consequently the heat exchangers do tend to get clogged up with dust and lint. It's a pain to clean them, but it may help. Obviously if there are filters in the duct, clean them or change them. Look for leaks in the duct work all the way back to the basement unit.