The team have been awarded the Trinity Sq HIU servicing project for the third year running. The site comprises of 240 Danfoss HIUs vvxb23. Our HIU engineers have since began the HIU services which should take 4 weeks to complete. Regular HIU service is the best way to ensure your Heat Interface Unit consumes energy in the most efficient manner. There are many benefits to a regular Heat Interface Unit service including adequately hot water and central heating, no leaks or build-up of lime scale, and lower energy bills overall. It is also a great way to catch any defective parts before they do break.