Chillers are energy hogs. Free cooling can give you a break by using colder ambient air during winter to perform cooling in ...

Geothermal heat exchangers almost always use condenser water or glycol as the heat transfer medium — and, sometimes, refrigerant. Wastewater heat recovery systems typically preheat domestic cold water ...

The typical evolution of an HVAC system’s sequence of operation (SOO) entails the design engineer writing the narrative for inclusion in the design documents. The controls contractor will then include ...