by Clifton W. Greim and David D'Angelo
American School & Univeristy
Dec 01, 1999.
Heating, ventilating and air-conditioning (HVAC) systems in new and renovated buildings have become increasingly complex. Hundreds of components are interrelated and often controlled by a central computer. And, like a chain with a broken link, if one part does not work correctly, it compromises the effectiveness of the whole system. Read Full Article >