Interim Report- Commercial Roof-top Units in Minnesota: Characteristics and Energy Performance
Packaged roof-top units (RTUs) are ubiquitous on commercial buildings throughout the United States because of their low capital cost, reliability and well-developed service and distribution network. There is anecdotal evidence, however, that these systems tend to operate inefficiently and sub-optimally. To validate or refute this evidence, we conducted a multi-level field study to characterize the RTUs in Minnesota. The objective of this study is to characterize the existing RTUs and the new/replacement market. This characterization can be used to inform the improvement or development of utility conservation improvement programs (CIPs) whose goal is to reduce the energy consumption of new and existing RTUs.
Full Report (PDF)
Commercial Roof-top Units in Minnesota: Characteristics and Energy Performance