I just installed a Napoleon HMF furnace that is a secondary burn furnace. I have only had a couple fires at this point, but I have noticed the flue does not get nearly as hot as a wood stove. Even with a roaring fire I can only get 275 degrees on the surface and it is normally 150-250 degrees. Is this normal? I do not have a probe installed but do have a simple magnetic gauge on the single wall pipe 1 behind the furnace.
Otherwise, this thing is awesome. I cannot believe the amount of wood, or lack of wood that I'm burning.
Otherwise, this thing is awesome. I cannot believe the amount of wood, or lack of wood that I'm burning.