Efficient VRF Technology Taking Root in U.S

Variable refrigerant flow (VRF) technology is gaining ground as one of the fastest growing segments in the HVAC industry. Invented in by Daikin in Japan in 1982 and commonly used throughout Europe and -Asia, building owners and facility managers here in the U.S. are recognizing the many benefits of VRF systems, which can efficiently and simultaneously heat and cool separate spaces in the same building. VRF systems utilize inverter-driven compressors to modulate the flow of heated or cooled refrigerant to individual units for on-demand comfort control. Significant energy savings are obtained through the ability to operate only at the needed flow rate, and by utilizing heat absorption output f

Improving Chiller Efficiency

Because an HVAC system is almost always the largest energy hog in a commercial or institutional facility, it is the most logical place to start when seeking to reduce energy waste. Chillers, in particular, can seriously deplete an energy budget when not operating at optimal efficiency. Chiller oversizing is one of the largest causes of energy waste. Chiller systems are designed to run at peak efficiency when operating at or near full-load conditions. But, because full-load conditions occur only occasionally in a typical year, specific steps must be taken to optimize chiller operation to match existing load conditions. In facilities that have more than one central chiller, efficiency can

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