My dad heated our house with a Black Bart fireplace insert. He tossed in a piece of fat wood I found once that probably weighed 2lbs.Had one just like that at deer camp, except the door was cast iron. We had that thing so hot a couple of times it was almost hopping around the cabin.
The doors were red and even though the air was shut off the thing was making a low “woooooohhhh” sound as it sucked in atmosphere.
We had windows open and it was in the low 30s outside

The chimney was cleaned out that night
