The theory is, and it seems to be holding true, that the hybrid stoves can not be shut down as well as a straight cat stove can. For whatever reason.Why the assumption that a hybrid will have shorter burn times than a straight cat stove? I think the shorter burn times of the non-cat's is solely due to the fact that they can't be shut down as tightly (thank your EPA). If the primary air on a hybrid could be shut as tight as a cat stove, then is there any reason it would not burn as long?
The Cape Cod is a 3 cu ft stove and webby is reporting usable heat of 12 hours. Done right, that isn't much different than a full load on the 30.