What should the humidity be set at a vacant house in Minnesota January through May


If you are going to spend a bunch of money on HVAC for a vacant house, 50% (or "between 40 and 60%")

Else, drain the plumbing, put RV antifreeze in the sink and toilet traps, turn off the furnace and let the humidity be what it is. Far less costly for 5 months.

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