In a recent study, the Energy Center of Wisconsin monitored several daylighting systems in Minnesota and Wisconsin and analyzed the results of commissioning those systems.
The researchers concluded: “Energy modeling, with its assumption of ideal control, appears to have the potential of being an accurate predictive tool for highly effective (>75%) control systems. However, the agreement between modeled and measured savings diverges significantly for the poorly controlled systems, with the model significantly over-predicting savings as compared to the measured results.”
The primary takeaway here is predicted energy savings are best realized if the lighting control system is properly commissioned.
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