Desiccant dryers are commonly used to bring the pressure dew point well below freezing (commonly -40°F) in order to prevent moisture from precipitating in the compressed air system and production equipment. In most cases, the need is actually seasonal and a refrigerated dryer is perfectly capable of meeting air quality needs for most of the year - and with much lower operating and maintenance costs. It is possible to install separate refrigerated and desiccant dryers in series for these applications. Better still are combination or “hybrid” dryer systems that combine dryer technologies into a high performing dryer with even lower operating costs.