Controlling humidity in IT environments is essential to achieving high availability. This article explains how humidity affects equipment, and why humidity control is required. The author offers quantitative design guidelines for existing and new computing installations, and he also explains the hidden costs associ-ated with over-humidification.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.