Cold Climate Air Source Heat Pump Final Report
About the Research
Air source heat pumps (ASHPs) are a high-efficiency technology with the potential to improve space heating and lower energy costs in homes located in cold climate regions where natural gas isn’t available. Although ASHP technology has been available for quite some time, technology limits have resulted in concern over the effectiveness of ASHPs in states with colder climates like Minnesota’s.
The project found that the efficiency and capacity of older ASHPs drops significantly for outdoor temperatures below 40°F. However, the newest generation of ASHPs can operate down to 0°F to -13°F. The efficiency of these technologies in moderate climates is also two to three times more efficient than standard electric heating systems. Research project staff monitored field performance tests to help confirm the operation of newer generation ASHP technologies to support their use in Minnesota's utility Conservation Improvement Program (CIP).
This project supported in part by a grant from the Minnesota Department of Commerce, Division of Energy Resources through the Conservation Applied Research and Development (CARD) program.