Hygrostats are commonly used in systems where humidity control is critical, such as in residential and commercial buildings, greenhouses, wine cellars, laboratories, and industrial settings. By maintaining the optimal humidity levels, hygrostats help prevent the growth of mold, protect sensitive materials from degradation, and ensure the comfort of building occupants. These devices can be found in conjunction with air conditioning, dehumidifiers, and humidifiers to automatically adjust the environment based on the real-time humidity readings.