A new advancement in lower-carbon HVAC technology addresses one of the key upgrade constraints associated with 4-pipe simultaneous heat pump chiller systems. The A-Combo R290 range can now provide flow temperatures of up to 80 degrees Celsius, broadening its suitability for retrofit projects where elevated water temperatures are required. Addressing https://purethermal.co.uk/media-news/retrofit-heat-pump-chiller-applications-with-80c-output-capability/