When a HIU needs servicing or repair, access to high-quality and reliable parts is crucial. On this page, you can browse and purchase our full range of HIU spare parts for a wide range of units and configurations.
A HIU (Heat Interface Unit) is used in modern heating systems, often in apartment blocks or district heating schemes. It transfers heat from a central boiler system into each home.
Our online catalogue includes spares such as valves, pumps, sensors, switches, expansion vessels, and heat exchanger plates — all from trusted brands like Grundfos, Ideal, and Wilo.
We offer expert advice and next-day delivery to help service engineers, technicians and installers carry out repairs with confidence.
HIU stands for Heat Interface Unit. It’s a device used in buildings like flats or apartment blocks where all the homes share one big central heating system. The HIU sits inside each flat and controls the heating and hot water coming from that central system. It works like a mini boiler, but instead of making heat, it passes it on, safely and efficiently throughout your space.
A boiler makes heat and hot water inside your home. A HIU gets heat and hot water from a central system that serves many homes, like in a block of flats.
A HIU has several parts that help it work properly. These include pumps, valves, sensors, heat exchangers, and expansion vessels.
A HIU should be serviced once a year to make sure it keeps working well and safely.
We stock many HIU spare parts, such as valves, pumps, sensors, switches, heat exchanger plates, and more. We sell trusted brands like Grundfos, Ideal, and Wilo.
