He lives around a 7700-7800 HDD area with annual winds of 10-12 MPH. Allenspark Colorado, where the Heritage is a great stove and works well is around 5550 HDD so Allenspark is very warm compared to Southern Wi. Allenspark is very windy, more so than Southern Wi. Poughkeepsie, NY is 6400 HDD, it's also warm comparitively and winds are similar to Southern Wi. Vintage 181 mentions Rutland VT and Southern Quebec and using the Mansfield. We don't know if it's too much stove for Vintage 181 or if the stove is in Quebec or Rutland, but Rutland is 7100 HDD and not windy so we have to keep going north. Montreal Canada and mid Maine are 7800 HDD's, and why I'm pretty sure the Heritage can't keep up with that much house, in that kind of climate, and windy to boot. I'm in the 7200 HDD and not windy and a 60k unit is just right. If a 60k unit is just right for a 1300 sq ft house in a 7200 HDD climate that's not windy, I can't see a smaller 55k unit heating a house 65% larger in a 7800 HDD colder climate that is windy and being able to pull it off. Anyway, that's why I think the Heritage won't work. Aren't people in Canada and upper Maine usually using bigger stoves?