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ModuSat XR CutAway

Twin Plate HIUs for Heat Networks

The complete solution for instantaneous hot water and indirect space heating in communal heating systems.

ModuSat XR logo

ModuSat® XR & XR-ECO

Twin Plate Heat Interface Units for Communal Heating Systems

Heat interface units for indirect heating and instantaneous domestic hot water (DHW) with electronic PID control using Pressure Independent Control Valves (PICVs) with modulating actuators achieving a low primary return temperature as well as providing differential pressure control and flow rate regulation.


The heating circuit consists of a plate heat exchanger (PHE), PICV, safety relief valve, manometer, flow and return temperature sensors, Wilo PWM circulation pump and expansion vessel. The heating circuit flow temperature is controlled by the modulation of the primary flow rate with the integrated PICV actuator. Weather compensation is applied to the set heating temperature using SmartTalk® 2-way communication. Suitable for radiators, underfloor heating or fan coil units.

Domestic Hot Water

Domestic hot water is heated via a separate plate heat exchanger and the temperature is regulated by the modulation of primary flow rate with the integrated PICV actuator. When fitted, the lime scale reducer minimises lime scale formation.

ModuSat XR-ECO

Designed for modern low temperature heat networks, ModuSat® XR-ECO units provide excellent heating and hot water performance at heat network primary flow temperatures as low as 60ºC or even 55ºC.


Features & Benefits

  • Independently Tested to the UK Standard for HIUs from BESA
  • Fast and Responsive DHW Performance
  • Designed for Modern Low Temperature Heat Networks
  • Low DHW Return Temperatures
  • Smart Connected Control
  • Integrated PaySmart® technology ready for pre-payment billing upgrade
  • KIWA Approved Unit - Provides compliance with the UK Water Regulations
  • SmartTalk® two-way communication for remote monitoring, control, alarms and diagnostics.
  • Mobile billing app available for use on smart phones and tablets.
  • Integrated heat meter MID approved and class 2 accuracy (BS EN 1434). Also capable of reading: Electrical Meter, Cold Water Meter & Chilled Water Meter
  • ViewSmart room controller with optional upgrade to provide ENE3 compliant smart metering
  • Option of top, bottom or combination connections
  • Various Metering & Billing Options Including remote monitoring, alarms and diagnostics
  • Optional casing and pipework insulation available
  • Integral hot water mixing valve for extra safety
Which ModuSat® XR Model is Most Suited to your Project?

ModuSat® XR


Ideal Primary Flow Temperature    
Fast & Responsive DHW

DHW Return Temperatures

Low < 25ºC Ultra-Low < 20ºC
(As low as 16.4ºC)

Find Out More by Downloading the Brochure Using the Form Below

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Communal & District Heating

A communal or district heating system supplies heat to a number of dwellings from a common heat source. It may comprise of, for example, a system heating a block of apartments or a larger scale system heating many buildings.

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Solutions for Social Housing

We understand what matters to the residents of social housing schemes, and how we can support Housing Associations to make their jobs easier.

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Solutions for Developers

We have experience working with developers to provide housing for diverse resident profiles, such as mixed-use schemes including high-end homes, combined with affordable housing and local amenities.

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