Project Info

Project Title 
Performance Evaluation Data for Dual-Evaporative Precooling Retrofit
Project Number 
Investor Owned Utilities 
Project Year(s) 
2013 - 2015

Packaged rooftop air conditioning units (RTUs), the predominant equipment for space conditioning of small and medium-size commercial buildings, are used in an estimated 70% of space conditioning in commercial buildings. Because RTUs can last for roughly 15-20 years in California, many companies are entering the market with retrofit products designed to improve the energy efficiency of existing RTUs.

To evaluate one of those retrofit products, this project gathered field data to demonstrate and understand the performance improvement associated with adding an evaporative pre-cooler for condenser inlet air and ventilation air to conventional RTUs.

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