Gary, to your questions when we bought the Trillium
it was already redone inside by the 1st owner. So I can just tell you what I know:
1. The icebox was replaced with a small dorm size fridge
2. AC was mounted where the heater used to be it was a Frigidaire and 8000btu's
3. Heater was replaced with small ceramic heaters.
The owner whom redid the inside was an electrition so he was pretty good on redoing the wires.
Hope that helps! Good day.