Bonus room temperature and humidity
We just moved (CZ4, humid) and have a finished bonus room above our unconditioned garage. The insulation is poor. Heat is electric baseboard. AC is currently none. The room is not in regular use. For example, we did not turn on the heat this winter.
If the room were in use, it would be ideal for a minisplit. But, we rarely use the space. Other than a large tub of DampRid, there is nothing up there to protect the space.
What do we need to do to avoid problems from seasonal temperature swings and/or humidity? Can we simply leave it closed and locked, excepting when we have houseguests?
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