I got the 12fp now and its amazing what this little stove can do. Our house is about 1500 sqft ncluding the finished basement where the stove lives. it was 25 last night. we ran the stove all day basement was 82 livingroom was 70 and bedrooms were 68 with no furnace. I was reading about the 13 and people say there alot better then the 12. Any sales goin on the 13 that anyone knows of? thanks paul