Heat Interface Unit (HIU): An Overview of Function, Benefits, and Applications
A Heat Interface Unit (HIU) is a compact device used in centralized heating systems to transfer thermal energy from a central heat source to individual residential or commercial units. Commonly installed in district heating and communal heating networks, HIUs act as the interface between the primary heating network and the end user, ensuring efficient and controlled delivery of space heating and domestic hot water.
What Is a Heat Interface Unit?
A Heat Interface Unit functions similarly to a domestic boiler but without direct combustion. Instead of generating heat on-site, it receives hot water from a central plant—such as a district heating system, combined heat and power (CHP) plant, or renewable energy source—and transfers that heat to the internal heating and hot water circuits of a building or apartment. This indirect heat transfer is typically achieved through high-efficiency heat exchangers.