Emily/Mark,
Thanks for the link to your well-written heater article.
However I don't think the article mentioned this safe, ultra low-electric-power consumption propane heater:
http://www.ventedcatheater.com/2.htmlBy the way, for some reason our RV's 26,000 BTU ducted propane furnace does not meet the negative profile that many keep bringing up here in the the forums. It's not too noisy at all (... as installed by Winnebago) inside the motorhome, and it's by no means on all the time (it cycles) - so it's listed 7-8 amps continuous per hour electric power consumption rate averages way less than this hour after hour. However we do block off parts of the coach interior nights, so it has to heat a smaller portion of the volume ... but still including the all important bathroom!
It cycled and functioned well during 30 degree nights recently when we camped in Arizona. I'm beginning to think that some of today's RV appliances' performance depends heavily upon how they are installed. As an example, our traveling friends recently had installed a new propane furnace in their 20 year old Fleetwood Class C. Their new propane furnace is phenomenal on noise level - it can hardly be heard at all when running ... truly whisper quiet.