Grant Aerona 290 15.5kW Heat Pump: Technical Specifications   The Grant Aerona 290 15.5kW (model HPR290155) is a factory-sealed, single-phase 230V monobloc air-to-water heat pump catalogued in our monobloc heat pump specifications database. Operating on a sealed hermetic R290 propane refrigeration circuit with a twin-rotary inverter compressor, the outdoor unit delivers high-capacity hydronic space heating … Continue reading Grant Aerona 290 15.5kW Air Source Heat Pump (HPR290155)