Indirect-Direct Evaporative Rooftop Unit Field Test Final Report

Report / June 26, 2013 / Advanced Buildings, Deep Energy Retrofits

As part of the Northwest Energy Efficiency Alliance’s (NEEA’s) investigation of new approaches to reducing commercial cooling electric energy use, New Buildings Institute (NBI) installed, monitored and analyzed the performance of a third generation indirect direct (IDEC) evaporative cooler on a commercial building rooftop in Boise, Idaho during the 2012 cooling season.

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As part of the Northwest Energy Efficiency Alliance’s (NEEA’s) investigation of new approaches to reducing commercial cooling electric energy use, New Buildings Institute (NBI) installed, monitored and analyzed the performance of a third generation indirect direct (IDEC) evaporative cooler on a commercial building rooftop in Boise, Idaho during the 2012 cooling season. This unit features a high efficiency configuration that takes the well demonstrated performance of the IDEC evaporative section and attaches it to an existing direct expansion (DX) rooftop unit (RTU) as a retrofit application. This final study builds on previous research related to evaporative cooling, but focuses on using control technologies to optimize operation of the units.