Heat Interface Units

Instantaneous pressure, temperature and flow control.


Read our latest brochure
FlatStation 7 Series DS Features & Benefits

Our 7 Series DS FlatStation has been designed with occupants, service engineers and installers in mind.

Download to find out more about how the super efficient technology can deliver maximum comfort and help reduce energy costs.



HIU Options - from Standard to Bespoke

Danfoss FlatStations (HIUs) come in 2 main types: Direct and Indirect both of which use a Domestic Hot Water (DHW) plate heat exchanger. Space heating can be arranged either by Direct FlatStations (HIUs), where the primary circuit connects directly to apartment space heating circuits, or alternatively by Indirect FlatStations (HIUs), which enable the hydraulic separation of the primary circuit through a second plate heat exchanger.

Simultaneous Pressure and Temperature Control

Maintaining a high efficiency whilst having a reliable supply of hot water is crucial.
Mechanical HIU controls ensure both system performance and comfort for residents.

Energy Metering

All Danfoss FlatStations (HIUs) can be easily be equipped with a Kamstrup energy meter, to fulfill billing requirements and enable ongoing energy optimization efforts.

Kamstrup 603 Meter in Hand

What you need to know

To ensure the best performing Heat Networks will require good quality Heat Interface Units (HIUs). Hence, all HIUs are bespoke to guarantee accurate control of, heat transfer, pressure, temperature, and flow. Delivering a high performance.

Key to the ongoing success of Heat Networks is customer satisfaction. Accordingly, all HIUs are designed for easy commissioning, low maintenance and a long-life expectancy (low OPEX and REPEX).

Danfoss FlatStation


Danfoss FlatStations installed in the UK alone


Document Downloads

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Design Guides & Brochures
  • FlatStation 7 Series DS - Features & Benefits

  • 7 Series DS (IV) Fully Insulated

  • 5 Series DS (R-FI) – Indirect DHW / Direct Heating

  • 5 Series DS (IV) - Indirect DHW / Direct Heating

  • 4 Series – Indirect Cooling Only

  • 1 Series DS Novi – Indirect DHW only

  • Prepayment Valve & Actuator

  • FlatStation 7 DS IV

  • FlatStation 7 DS R-FI

  • FlatStation 7 DS FI

  • FlatStation 5 DS IV

  • FlatStation 5 DS R-FI

  • FlatStation 5 DS IV-MIX

  • FlatStation 4 C28

  • FlatStation 4 C

  • FlatStation 3 Series BS IV

  • FlatStation 1 BS One B

  • FlatStation 1 DS Novi

* Please select the documents that you wish to download, enter your details in the form and click submit.

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