rberq wrote:Yes, xackley and Devil..., that's kind of what I thought. There's radiation of heat, and there's conduction of heat. Seems like the forced air blowing over the steel would carry off heat by conduction. And I'm sure that is happening. But because the stack temperature does not go down much when the fan runs, the available heat must be radiated if it is not conducted, so I have to conclude the net effect of the fan is minimal. But it still feels good to stand in that hot fan blast when you come in from the cold.
I think what we are all saying is that while the blower fan's effect on the heat being created (& lost up the chimney) inside
the stove is minimal, its effect on the amount of heat being transfered from the stove to the room is actually quite critical. The "Heat lost up the chimney" is actualy not changed much but the heat lost (to the room) by mere radiation (lacking the fan's ability to conduct the heat to where it's needed) is significant.
I think the only device actually designed to reclaim some of the heat being lost up the chimney is one of those heat reclaimers (forget the actual name) that connect to the outgoing stove pipe just above the stove b4 it goes into the chimney. As I understand it (having never tried one of these devices) there are clogging up issues with them as well as their draft effect due to the lowering of exhaust gas temps.