I occupy a home in Southern ORegon and leave for warmer/drier climate in the winter. I am not sure if there is a minimum temperature setting for my heat pump beyond the obvious to avoid freezing.
Typically I sent the thermostat to keep the house at around 55F. I am considering setting it VERY LOW at around 35-40F to save $$$.
I'm guessing that I'd have no freeze problems as long as I keep the inside temp about 32F but I wonder if I might cause damage to any of the interior such as carpet, hardwood floors, etc. The house was built in 1994, 1700 sq. ft. and is fairly well insulated.
There is a good chance that it would affect your hardwood floors. Especially if they are solid opposed to engineered. Solid hardwood floors will expand and contract due to changes in temp. and humidity. Engineered hardwoods still expand and contract, but not as much