ModuSat SPH heat interface unit

ModuSat® Single Plate Heating Interface Units

  • Indirect high efficiency heating
  • compact and wall mounted to fit perfectly in a utility room or kitchen cupboard
  • Suitable for Radiator and Underfloor Heating systems
  • Suited to commercial buildings and high end residential dwellings due to the ability to supply high capacity loads to meet demand

Contact us

Contact us on 01372 722277 for further information or a quotation.

ModuSat® Single Plate Heating (SPH) Interface Units

Our ModuSat SPH range of HIUs provide Indirect high efficiency heating for dwellings or commercial areas served by a communal or district system.

Units are suitable for both radiator and underfloor heating.

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Metering and Billing Ready

The Heat Network (Metering & Billing) Regulations (2014) require each resident to be billed individually for the proportion of the total heat they consume from the heat network.

Our ModuSat® units make this easy, featuring an integrated ultrasonic heat meter, which is MID approved with class 2 accuracy (BS EN 1434), ready to connect to a communication network for metering and billing purposes.

In addition, our PaySmart® pre-payment technology is also integrated into each ModuSat® heat interface unit as standard, and – unlike many other pre-payment billing solutions – can easily be activated remotely at any time and requires no additional hardware or infrastructure to set up.

Smart Energy Regulation and Control

Our Smart Energy Regulation and Control provides a myriad of benefits in terms of HIU performance and optimisation of heat network efficiency. So how does it work?

  • Pressure Independent Control Valve (PICV) provides integrated differential pressure control, providing balanced, self-configuring flow through the HIU
  • Fast acting, electronically regulated actuators provide immediate response to changes in energy demand
  • Proportional Integral Derivative (PID) control logic provides accurate actuator/valve control
  • Electronically actuated PICV’s also function as a shut off valve, so ModuSat® Smart HIU’s can easily be configured for either credit or PAYG billing systems
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Technical details

ModuSat® Single Plate Heating (SPH) Interface Units

The ModuSat® Single Plate Heating interface unit has been designed to provide heating for dwellings or commercial areas served by a communal or district system. The unit is supplied via primary LTHW water, which is provided by centralised plant.

Consisting of a plate heat exchanger, combined with electronic PID control using Pressure Independent Control Valve (PICV) with modulating actuator achieving a low primary return temperature as well as providing differential pressure control and flow rate regulation.


The ModuSat® SPH unit is designed to operate with Evinox SmartTalk® two-way communication system for remote metering and diagnostics.


The heating circuit consists of a plate heat exchanger (PHE), 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.

Features & Benefits

  • Very compact design with minimum space required for installation
  • Ultrasonic heat meter MID approved and class 2 accuracy (BS EN 1434)
  • Excellent thermal efficiency achieved using the latest technology and efficient brazed stainless steel PHE’s
  • Integrated PaySmart® technology ready for prepayment billing upgrade (activated remotely at any time)
  • Billing app for use on smartphones and tablets
  • ViewSmart room controller with optional upgrade to provide ENE3 compliant Energy Display Device
  • Electronically controlled PICV for primary flow rate modulation to match demand, differential pressure control and energy shut-off
  • Pipework constructed from copper
  • External filling loop (Optional)
  • SmartTalk two-way communication
  • Remote monitoring, alarms, and diagnostics
  • Wilo PWM Pump – Provides compliance with EU ErP Directive 2015
  • Includes inbuilt TCP/IP technology to operate on an Ethernet network if required
  • Capable of reading an electricity meter (Option for ENE3)
  • Flushing bypass kit enables the primary side of the system to be flushed and cleaned without damage to the unit

Download the Data Sheet

ModuSat SP Heating Data Sheet

ModuSat SP Heating Data Sheet

Download the ModuSat® Heat Interface Unit Brochure for More information

Discover how Evinox Energy can deliver the best heating solution for your next new build or refurbishment heat interface unit project

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Heat Networks

  • District and Communal Heat Networks
  • Delivery of low carbon heating
  • Heat Interface Units
  • Energy Metering and Billing
  • Service and Maintenance
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Energy Metering & Billing

  • Credit Billing Services
  • PaySmart® Pre-payment System
  • Billing Solutions for Non Evinox Equipment
  • Heat Network (Metering & Billing) Regulations 2014 Advice and Guidance
  • Domestic Heat Meters and Point of Entry & Bulk Meters
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Service & Maintenance

  • Heat Interface Unit Service & Maintenance
  • Plant Room – Planned Preventative Maintenance (PPM)
  • ModuSat® Heat Interface Unit Enhanced Warranty Cover
  • Combined Packages for Metering, Billing and Service & Maintenance
  • Domestic Boiler Service & Maintenance