A humidistat thermostat is a device used to control the humidity levels in a room or building. It works by monitoring the humidity levels in the air and then adjusting the air conditioning or heating system accordingly. The humidistat thermostat is designed to maintain a comfortable level of humidity in the air, which is important for human health and comfort. It can also help to reduce the risk of mold and mildew growth in the home, as well as reduce energy costs. The humidistat thermostat is typically installed in the wall and connected to the HVAC system. It is programmed to maintain a specific humidity level, and it will adjust the air conditioning or heating system to maintain that level. The humidistat thermostat is an important tool for keeping the air in your home comfortable and healthy.