Commercial roof-top units in Minnesota: characteristics and energy performance

RTUs are used in more than one third of U.S. commercial buildings, the highest of any cooling equipment type. Why? They are reliable and have a low capital cost, as well as established service and distribution networks. There is anecdotal evidence, however, that these systems operate inefficiently. To validate or refute this evidence, we’re conducting a multi-level field study sponsored by Minnesota Department of Commerce, Division of Energy Resources. The first part of the study is complete. We took a look at existing RTUs and the new/replacement market in Minnesota to inform energy efficiency programs in the state. Read the interim report.

Part two of this study—in-depth monitoring of RTUs conducted by Center for Energy and Environment—is expected to publish in spring 2017.