[Ima saver]

I am soryy, I wish my husband could talk to you. He says that heat pumps are not energy efficient at all if the temp. is 42 degrees outside or lower. That is why they are ok in florida, but not good in other states. He has built over 80 homes and put propane in all but the two I mentioned. After high energy bills, the owners had the heat pumps taken out and installed gas heat.
While you are gone, set the heat as low as it will go. You only need it about 40 to keep the pipes from freezing. BTW, all the electric companies really push heat pumps cause it makes them money.