This report was authored by Keith Burrows from The Atmospheric Fund and published on June 14, 2022. The Atmospheric Fund (TAF), working with CityHousing Hamilton (CHH), planned and implemented a pilot project at a three-story multi-family residential building with 40 units. They installed a heat recovery, variable refrigerant flow (VRF) air source heat pump (ASHP) system in three suites to test the performance of the technology under real-world conditions and to provide best practice recommendations. Results showed increased comfort with the addition of colling and while the heating loads were met there were no significant electrical savings when compared to the electric baseboard heaters previously used. This case study provides results, lessons learned, and recommendations. It includes significant detailed information on the measurement and verification methods including the tenant survey results.

Keywords: Building Retrofits, Control & Monitoring Equipment/Sensors, Energy Efficiency/Management, HVAC & Indoor Air Quality (IAQ), Heat Recovery ASHP, (IPMVP)2 Option B