Hospitals add desiccant systems at the make-up air inlet to remove the moisture load. Without that moisture, the cooling systems can be reset for optimal temperature control, while the desiccant system takes care of controlling humidity. Each technology is used for what it does best, so while the HVAC system is operating at maximum efficiency, the surgical staff can work in complete comfort. The Surgeon feels comfortable in spite of heavy radiant heat from lights and equipment, and continues to work with less stress and therefore less potential for error. In Ductwork Dry air from the desiccant system floods the air distribution system, starving any mold and mildew that might otherwise grow in air ducts and on filters.
Dry air increases the safety margin protecting patients from airborne fungal infections.
The desiccant system keeps the air dew point below the temperature of cold surfaces in the operating room, eliminating the potential for unsanitary condensation on walls, floors or instruments. Since the cooling coils no longer have to condense water, the HVAC system responds very quickly to changes in temperature set point. Now the OR can be ready for the next procedure in minutes instead of hours, improving utilization of costly facilities.