My 2 cents is from experience. Ours came with the ac/heat pump combo in the LR. It works down to 30 degrees but takes a long time to heat up the room. We have an electric fireplace and a furnace. The furnace warms up the room much faster and the fireplace keeps it warm. If I had to replace the ac/heat pump I would not get the heat pump. I think the heat pump is noisier than the furnace, if we run it at night it sounds like humming and bothers my sleep. I like the other suggestion, get a space heater, works good and much cheaper (or the cheap heat)