I know I'm late coming into this but I built one in my house. I live in Greensburg Kentucky. It doesn't look like much yet but we work on it every year. So far it's been a #1 heater of our house. I use a old round wood stove in my basement. But if I keep my rocket mass heater going for 2 days it heats my whole home. I'm going to convert my wood stove to a hybrid rocket mass heater. And see if it would be easier to heat my house. Hope you love your heater as much as I do mine.
