I have a vacation house that I visit a few weeks a year, which faces a condensation issue.
Indeed, when I stay there in winter, where the outside temperature is well below freezing, I measure around 24°C/75°F and 40% humidity (absolute: 0.009 kg/m3). (Heating with a fireplace, hence the high temp and low humidity)
When I leave and set the heaters to frost protection, in a couple days, the house is back to 7°C and 50% humidity (absolute: 0.004 kg/m3).
The difference between the two is condensation that is ruining the lime plaster on the stone walls.
What are best practices to cool down a house without condensation (and without spending the GDP of a small country to heat the house, nor bursting all water pipes.