The DATA Extra HIU
Twin Plate Hydraulic Interface Unit for large Domestic / Commercial Domestic Hot Water & Indirect Central Heating
Servicing and maintenance Our service engineers provide annual health checks, fault-finding, repair and maintenance services on existing HIU, thermal store, thermal bank, (district) heat networks and substations.
Heat network optimisation Our team has decades of experience designing existing heat banks, HIUs and substations. We are the best fault-finding and optimisation experts for any type of heat network in the UK.
Energy efficiency monitoring 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 DATA Extra HIU is designed to accommodate large domestic or commercial properties with a heating load in excess of 20kW. It is able to provide plenty of hot water for multiple outlets but also able to cope with the heat loads of larger buildings.
| 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) |
653 (W) x 900 (H) x 225 (D) |
| Dimensions – inc. Plumbing Jig (mm) |
653 (W) x 1000 (H) x 225 (D) |
| Heating Output (nominal) |
80kW |
| Hot Water Output (nominal) |
65kW |
The DATA Extra comes in an attractive Steel casing with all internal components being fully insulated, giving low heat losses less than 50W. All pipework connections are bottom entry and the HIU comes with ModBus communication as standard. A number of optional extras are available, as shown below.
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Options
- Various heat meter models (fascia mounting external to casing)
- Landlord security Isolation
- Integral CH pump (700mm Wide Casing)
- DHW recirculation pump kit (for mounting external to casing)
- Water hammer arrestor
- Differential pressure control valve for >2.5 bar ΔP (for mounting external to casing)
- Expansion vessel and safety relief valve (for mounting external to casing)
Downloads
Links
Technical Detail