ddahlgren wrote:.... Cutting them in half is generally a good start as well. Some of the ratings are pretty hard to believe for an un-baffled steel box of small size.
I agree. Ever since Franco B pointed me in that direction, I have been a big proponent of cutting the mfgr's BTU ratings in half to bring them into the realm of reality. This being for hand fired stoves. For stokers the feed rate determines the BTUH input and thereby the potential BTUH output.