Packaged rooftop unit (RTUs) are used in over approximately 60% of all air-conditioned commercial floor space, with about 60% of these units using natural gas for heating, including over 400,000 units in the Northwest. With such a high market saturation, implementing more efficiency RTUs would generate significant energy savings.

To gain an understanding of real-world performance, cost, and constructability, the Northwest Energy Efficiency Alliance (NEEA) commissioned a field study looking at the performance of eRTUs. This report summarizes that study, the results, and the lessons learned through the experience.