SMCs series IDH compact air dryer offers stable, compressed air temperature control with its integrated heater, regulator, dryer, and filter.? The IDH air dryer delivers a constant volume of compressed air at the correct temperature, dew point, pressure and cleanliness, regardless of external conditions or seasonal climatic conditions.? Due to its compact size, and the ventilation holes being on the front and top, the IDH can be installed closed to a wall or panel.