If condensation occurs on the inside of the window, what should the humidistat be set to?

When condensation forms on the inside of a window, it typically indicates that the humidity level inside the space is too high for the current temperature. To reduce the likelihood of condensation, the humidistat should be set to a lower humidity level.

By decreasing the setting on the humidistat, you allow for better control of indoor humidity, which helps to minimize moisture in the air. Lower humidity levels will reduce the chance of condensation occurring on windows and other cold surfaces. The ideal indoor humidity level usually falls within the range of 30-50%, depending on temperature variations.

Increasing the humidistat or setting it to zero or 100% would not address the underlying issue of excess moisture and could lead to other problems such as dryness or further humidity build-up, which could enhance the chance of condensation forming again.