States that microorganisms are well protected indoors by the moisture surrounding them if the relative humidity is above 70%. They can cause many acute diseases. Introduces a desiccant-assisted system that combined dehumidification and mechanical refrigeration by means of a desiccant preconditioning module that can serve two or more conventional air conditioning units. Demonstrates that the proposed system, also having indirect evaporative cooling within the preconditioning module, can reduce energy consumption and provide significant cost savings, independent humidity and temperature control and therefore improved indoor air quality and enhanced occupant comfort.

KEYWORDS: year 1995, Desiccants, outdoor air, heat recovery, refrigeration, dehumidifying, ventilation, air conditioning, indirect cooling, evaporative coolers