Sorry, the 110 plug in post# 98. Sorry to hear that your having so much of an issue with the heater. I have only had my trailer out in temps in the low thirties and it really wasn't much of an issue, just closed one of the windows and ran the heater for 15 mins or so and it was nice and toasty! It really is insulated with the carpet. I don't know if I'll make it to TOTH, I would like to go to Sedonafest. We will see what work has for me and of course the money! 