Thermal and Humidistat

When ventilation is needed, our recommendation for proper condensation control is a humidistat to regulate the humidity.
A humidistat is an electronic device analogous to a thermostat, which responds to relative humidity rather than temperature. Humidistats are used in a number of devices including dehumidifiers, humidifiers and microwave ovens. In humidifiers and dehumidifiers the humidistat is used to maintain constant relative humidity conditions (this is useful in places such as a refrigerator, greenhouse, or climate-controlled warehouse).
You can find out more about humidistats here.