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Unrivalled performance Our pioneering technology and control systems deliver high precision heat management and unrivalled performance in both domestic and district heating environments.

Best for through-life costs Intelligent design leads to greater simplicity – that’s why our systems are cost effective to install, more reliable and cheaper to run and operate.

Better by design Our unique and innovative technology has been refined over many years and is protected by numerous patents relating to water storage, heat exchange and the networking of communal heating systems.


The HiFlow CH is an extremely powerful single plate HIU, designed to provide heating for larger domestic or commercial properties.  Its modular design enables it to be mounted into a supporting frame with several more HiFlow modules all connected via a manifold to provide very large heating outputs.

The CH module can also be fitted alongside various different modules including hot water, underfloor manifolds, air handling units, BMS and more, to form a compact yet powerful bank of modules to cater for all the needs of the property.

The HIU is fitted with the latest digital electronic control valve to ensure pressure independent control but to also exchange accurate information about the actuator/valve position, settings, temperatures, & alarms.  It also comes equipped with ModBus communications as standard.


HIU Type Central Heating Only
Hot Water Configuration N/A
Heating Configuration Indirect
Heating Temperature Control Yes
Built-in Heat Meter Yes
Dimensions – HIU Case (mm) 665 (W) x 665 (H) x 313 (D)
Dimensions – inc. Isolation valves (mm) 665 (W) x 870 (H) x 313 (D)
Heating Output (maximum) 100kW (per module)
Hot Water Output (maximum) N/A


The HiFlow comes in an attractive EPP casing and the internal components and pipework is fitted with secondary insulation to give remarkably low heat losses less than 50W. All pipework connections are bottom entry and there is an are option of rear entry pipework.  Support frames and manifolds are also available for mounting up to 3 modules in parallel to form a powerful substation.

Items such as the pump, expansion vessel and safety relief valve must be fitted external to the casing, and are available from Thermal Integration on request.



  • Expansion vessels, pumps, safety relief valves etc.
  • Decorative painted steel casing insert
  • Various heat meter models (fascia mounted external to casing)
  • DHW recirculation pump kit (for mounting external to casing)
  • Bottom, Side or Rear pipework connections
  • Range rated outputs from 20kW to 100kW
  • HiFlow Module mounting frame
  • HiFlow Module manifold kits


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