Heat pump/Furnace size
We recently purchased a Bryant 289 two-stage heat pump and a plus 80 model 315 furnace instead of a more efficient furnace and A/C. While the heat pump was pricey, we did receive 2 rebates The theory is that the larger heat pump will do most of the work year round, while the 80% furnace will only kick in as needed. Since I am at home most of the time, we were told not to touch the thermostat day or night as this would just "confuse" the heat pump. And I have been told to run the furnace fan on low year round to circulate the air. Is this a sound philosophy? I'm not doubting my dealer. I just want to make sure I understand the principal.
Also we live in a condominium in Nebraska with 1742 square feet upstairs(where we spend 95% of our time) and 420 square feet in the basement. I've been told by other parties that these two units are too large for this space. Is that true?