I looked at the CheapHeat but didn't get it:
1) In my rig there isn't enough clearance.
2) Even if there were enough room, my furnace is at the opposite corner of the rig from the electrical panel, so running the wire would have been a problem
3) It's expensive at $495 for the CheapHeat alone
I ended up installing a King Electric pic-a-watt wall heater:
http://www.king-electric.com/prodtemp.asp?prodID=HEAT_PAW
I have one that is 120 volts and have it set up for 1500 watts, so I can run it on any service down to 15 amps. They make them in 240 volt versions also, and regardless of voltage, you can set them up for varying wattages.
Because it's permanently installed in a location away from drapes, upholstery, and so on, I believe I have a much safer setup than I would with a portable heater. No worries about it tipping over or being moved by dogs, kids, etc. I think I paid around $150 for it.
It has worked out well.
Gary RV Roamer said:
Insurance companies think you should stay home in bed, so their input on most any question like this is so conservative as to be useless (IMO).
You should get a medal or something for that.