Danfoss Flatstation (HIU)

Tried. Tested. Trusted Teknologi

Danfoss FlatStation Heat Interface Units are suitable for small one bedroom apartments up to major commercial applications.

Please contact us for design, sizing and selection.

Heat Interface Unit product range

In this table you will see all the relevant key data for the HIU product range:

Category1 Series3 Series4 Series5 Series7 SeriesHigh CapacityCustom
TypeDHW onlyHeating onlyIndirect coolingDHW and direct heatingDHW and indirect heatingFloor standing or wall mounted for high loadsProject Specific


Built to last.

Danfoss FlatStations go through comprehensive quality assurance and are built to standards that adhere to ISO/TS 16949:2009 (Quality management system requirements for the design and development, production and, when relevant, installation and service of automotive-related products). Danfoss FlatStations are the tried, tested, and trusted solution within UK, due to it standing the test of time in Denmark, a country with decades of heat network experience and knowledge.


Born with Danfoss DNA.

The most important design objective for a 4G Heat Network (HN) is to consistently achieve low return temperatures under all operating conditions. To accomplish this, the heat interface units (HIUs) must demonstrate expert control of pressure, flowrate, heat transfer and temperature. Danfoss regard these four competencies as their DNA.

Easy to use.

Built around the user.

Danfoss FlatStations are easy to install, commission and service. They require no specialised equipment to set-up and begin delivering heat efficiently and reliably to the consumer.


Always by your site.

Whether from the initial brief and employers’ requirements (ER), to detailed design, commissioning, and handover, to ongoing operation and site support.

Heat Interface Unit documents

Please find relevant links for further reading below, or visit our downloads page.

Have a question?

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To search for documents, please visit Downloads and use the search function / filters on that page.

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