The document summarizes a field study of 8 cold-climate air-source heat pumps (ccASHPs) installed in Minnesota homes. It found that the ccASHPs performed as expected for heating, with annual COPs lower than ratings due to auxiliary heat use. Flex fuel ccASHPs could heat below 5°F while all-electric systems could heat below -13°F. Installations of ccASHPs showed potential for 40-60% reductions in site energy use, emissions and costs compared to propane or electric resistance heating. The study demonstrated ccASHPs can provide beneficial electrification in Minnesota.