This project designed R410A heat pumps for a number of SMEs in Europe. Initially there was very little practical experience of R410A, although literature suggested that R410A heat pump equipment would produce systems of smaller physical size and higher efficiency than those of R22 and R407C. To achieve higher efficiencies however, it is not only the heat pump that has to be considered; maximum performance also requires an analysis of the hydronic system. Thus this project has looked at all significant aspects of component selection, system sizing and construction and installation from a technical, marketing, safety and legislative perspective. The resulting heat pumps underwent field trials and achieved impressive seasonal performance factors of up to 4.74.
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