Northeast Energy Efficiency Partnership (NEEP) has released the results of its field study on ductless heat pumps in cold-climate areas. The goal was to determine the potential energy savings and efficiency with ductless heat pumps and gauge homeowners’ usage patterns and satisfaction with the new technology.
The study focused on nine New Hampshire homes that used either conventional heating systems (electric resistance, oil or propane) or standard air-source heat pumps for primary heating. All of the homes were retrofitted with ductless heat pumps in January 2013. Eight homes had our Hyper-Heating INVERTER™ (H2i®) MSZ-FE models installed. NEEP researchers monitored the energy demands and usages from February to September 2013 with our Northeast Business Unit on hand for technical support.
NEEP concluded that the systems performed very well year-round and exceeded the homeowners’ expectations in most cases. Here are seven key findings from the study:
- Ductless systems resulted in average energy savings of $832 per heating season when compared to the electric resistance baseline for primary heating.
- Ductless systems saved an average of $613 per heating season when compared to the oil heat baseline, which was the baseline used for the majority of the participant sites.
- Ductless systems resulted in average energy savings of $398 per heating season when compared to the standard air-source heat pump baseline.
- Our H2i MSZ-FE systems performed at 100 percent rated capacity at 5 degrees Fahrenheit and even produced heat down to minus 18 degrees Fahrenheit.
- A majority of the homeowners who initially considered the ductless heat pumps as supplemental systems now rely on them as the primary heating sources.
- The ductless heat pumps also provided energy savings during the cooling season. Owners of the eight homes with our systems ended up foregoing plans to install central air-conditioning or removing existing window air-conditioning units to use the ductless systems for cooling instead.
- Our H2i MSZ-FE systems exceeded homeowners’ expectations of the technology. Homeowners in all eight homes were highly satisfied with the energy savings and comfort level they experienced.
NEEP said earlier this year that an annual energy savings of approximately $1.2 billion could be reached and over 7 million metric tons of carbon emissions avoided each year if homeowners currently using electric resistance for heating adopted ductless heat pumps. We hope our participation in this study raises awareness of this technology so that together we can accelerate energy efficiency in homes and build a healthier, more sustainable future.
For more information on this study, click here for NEEP’s full report.