So a little off direction here but...
H Ranch, you mentioned that it took 8 hours to get the house back up to temp with the fan running the whole time, would it be possible to turn the propane burner on for a little bit, that way ou wold be blower preheated air over your coil.
It seems like that would make even hotter air, do that for like an hour it would cost you a gallon of propane, but if it quickly raises the heat in the house.
Or is there something in there that i am missing that wold make that bad, other than burning some gas.