R-454C air-source heat pumps used to replace gas boilers at university campus

Nine air-source heat pumps using R-454C (GWP 146, A2L) refrigerant have replaced gas boilers at a university campus in the UK.  The units were selected as they can deliver domestic hot water up to 70°C, to be used for both heating and hot water. The delivered water temperature avoided the replacement of all the pipework and radiators throughout an operational building, which was not feasible.

Each unit can work in a cascade system to reach capacities of up to 640kW.  The multi-unit system can deliver capacities to match the different load requirements throughout the year, and can also rotate operation between units, to help extend equipment life. Read more in Heat Pumps Today.