Hi Bob,
Electric heated carpets. Be sure to use a fabric underlay or the tile on the floor may turn a dirty brown color (DAMHIK).
There is a type that has no wires--that is what I purchased. They will cut it to allow for things such as dinette table pedestals. I selected indoor outdoor carpet as I can take it to the car wash and use a pressure hose to clean it.
Currently urban docking with 2 15 amp circuits. Ambient temperature is 2 C. Floor temperate is 40 C. It feels nice on bare toes!
My supposedly four seasons class c has enclosed tanks--which were supposed to be heated. I added a 120 volt outlet and use a small 600 watt fan type heater with a mechanical thermostat. I've tested that to -37.
