Nvmd, priced out the NT-20SQ instead because I read on another thread that it's a bad idea to install a larger power furnace?? The posters rationale was that if you put a 35,000 BTU/h unit where a 22,000 BTU/h was, it won't cut in as much and hence allow more opportunity for pipes to freeze. In Canada the price of the 19,000 BTU unit is $1000 CDN. I'm thinking if I really want a woodstove (oh, I really, really do) that I might just put something super small in there to keep the pipes happy? Lots to think about. I want to live in this thing for about 10 months in Boulder, CO so potential of pipes freezing will be a very real thing.
I am so grateful for this forum and all your kind advice.