Rather than replacing the existing boiler plant entirely, the project adopted a modular hybrid approach. Heat pumps handle normal heating and domestic hot-water preheating, thermal storage absorbs short-duration demand peaks, and the boilers remain available for extreme winter conditions, final water-temperature lift and emergency backup.

Six EXINDA 24 Ton R32 Commercial Inverter Air-to-Water Heat Pumps—three serving each building—provide independently controlled, staged capacity. Inverter-driven EVI scroll compressors support efficient part-load performance and reliable low-ambient operation, while BACnet or Modbus integration enables runtime rotation, coordinated sequencing and module-level isolation.

The completed system reduces routine boiler use without compromising resident comfort or hot-water availability. Its modular design also simplifies maintenance, limits the impact of individual equipment downtime and gives the property a practical, scalable path toward greater electrification.