A new advancement in low-carbon heating and cooling technology addresses one of the key upgrade constraints associated with 4-pipe simultaneous heat pump chiller systems. The A-Combo R290 series can now provide heating output temperatures of up to 80°C, expanding its suitability for retrofit projects where higher flow temperatures are required. https://purethermal.co.uk/media-news/retrofit-heat-pump-chiller-applications-with-80c-output-capability/