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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 Standard DATA HIU is tested to the BESA UK HIU Standard, and has demonstrated beyond doubt to offer greater efficiencies than any other system.  The DATA Plus is based entirely on the standard DATA model, however it is capable of up to 80kW Domestic Hot Water output.

It uses the latest electronic stepper motor controls to provide both domestic hot water and central heating, indirectly via plate heat exchangers.  The heating output temperature is adjustable to allow for connection to various different heating systems such as radiators or underfloor heating.


HIU Type Heating and Hot Water
Hot Water Configuration Indirect
Heating Configuration Indirect
Heating Temperature Control Yes
Built-in Heat Meter Yes
Dimensions – HIU Case (mm) 490 (W) x 640 (H) x 271 (D)
Dimensions – inc. Plumbing Jig (mm) 490 (W) x 846 (H) x 271 (D)
Heating Output (nominal) 25kW
Hot Water Output (nominal) 80kW
Sealed System Kit Position Integral to casing


The DATA comes in an attractive EPP casing with remarkably low heat losses less than 50W. All district network connections are top entry and apartment connections are bottom entry. A number of different valve configurations are available including a flushing bypass for the district network connections and pre-plumbing jig for the apartment connections.

An 8ltr expansion vessel, safety relief valve, temperature and pressure gauge, drain point, primary and secondary strainers and 7.5 mtr pump are fitted as standard.



  • Decorative white steel casing wrap
  • Case and heat meter tamperproof security fixings
  • Various heat meter models
  • Landlord security valve or relay kit
  • DHW recirculation pump
  • Water hammer arrestor
  • Differential pressure control valve for >2.5 bar ΔP
  • ModBus communication module
  • UFH overheat thermostat pump cut-out terminals


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