During the winter, what should the humidistat control be set at?

Setting the humidistat control at 40% during winter is advisable to maintain a comfortable indoor humidity level while preventing issues associated with excessively dry air. In colder climates, maintaining humidity levels between 30% and 40% is ideal; lower levels can lead to dry skin, respiratory issues, and damage to wooden furniture or structures due to the decreased moisture content in the air.

By choosing 40%, you ensure that indoor air remains sufficiently humid for comfort and health, while still mitigating risks like condensation on windows, which can occur at higher humidity levels. This balance helps to maintain a pleasant living environment during the cold season, making it the preferred choice.