Recommended for use in assisted living facilities, schools, prisons, and buildings constructed of materials that are more sensitive to high moisture levels. Monitoring the temperature and/or relative humidity in a space, this control will automatically adjust the ventilation rate to or from a space by increasing or decreasing the speed of the fan. For applications where temperature or humidity sensitive electronics are housed ? including attics, shop floors or boiler rooms where high moisture and mold growth is a concern or in areas where a comfortable atmosphere is necessary.