Strange, I've had this "Air Transfer" heat pump for four years now.
The other three winters, when I turn the heat on even with the outside
temps at 40 degrees or better the heat pump would go to auxiliary heat
and just stay there most of the time.
Something must have happened and I don't know what. The heat pump
stays on regular heat like is should and only switch to auxiliary heat
occasionally like it should even if the outside temps are down to 10
degrees and as long as I don't set the thermostat more than a couple
of degrees above the inside temp.
When the outside temps get down to 25 - 30 degrees, it still won't
keep the house warm by itself tho. But now I can use the heat pump
more in conjunction with the pellet stove. The heat pump keeps the
bedroom and bathroom warmer and the pellet stove keeps the living room
and kitchen warm.
I still want to put in a different furnace when I get back to working
tho. I want a furnace that will heat the whole house by itself when
the pellet stove acts up and probably even move the pellet stove to
just backup heat. But I think my only choices are propane or fuel
oil. We don't have a natural gas pipeline on this side of the
interstate this far from town. I like the idea of propane better than
fuel oil but isn't propane about the most expensive per BTU?