Thanks for the tip. How big is the house you are heating? I am in central wis. So the climate is about the same as yours. Do you have any trouble keeping the house at 70 when the temps outside are I the single digits and below zero?
I'm heating 3400 sq ft. The layout of the house does not lend itself to heating with a single heat source (four levels and the PH is not centrally located. I have a Drolet Tundra wood furnace dumping into the plenum of the existing Propane forced air furnace. The Tundra can maintain 68-70F at outside temps down to about 15F depending on wind direction. With both the Tundra and PH fired I can pretty much reach any desired inside temperature no matter what the outside temps are at.