Thermal Integration partner with HSF B.V. in the Netherlands who manufacture a full range of HIU's for Thermal Integration but also for the European market. Their expertise and experience is second to none, and they have carried out a significant study on water quality in district heating systems.
We place as much emphasis on water quality as we do system design and we have therefore adopted their document D53261A - Requirements on water quality for Heat Interface Units for District Heating systems, a copy of which can be downloaded here