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High efficiency hydraulic [heat] interface units (HIUs) for the supply and control of heating and hot water to domestic and commercial properties connected to a district heating system.

The most efficient heat interface units in the UK

HIU performance has a major impact on the operating efficiency of a heat network. We are proud that independent BESA testing has confirmed what we already knew – our products are the most efficient in the industry.

And the good thing is you never need to take our word for it, with the independent test results providing performance data under standard conditions, while the continuous stream of data coming from HIUs in the field allows us to demonstrate real world performance like nobody else can, or dare – we couldn’t hide a problem (if there was one) if we tried.

Pioneering HIU design

Heatweb manufactured the very first electronic HIUs in the 90s. We continue to drive the industry forward through continuous product development and many unique, patent-protected features.

We have unmatched experience and understanding of heat network design, based upon many thousands of successful installations throughout the UK, and can provide more accurate and efficient utilisation of thermal energy in district heating environments.

And this is recognised – we have contributed to every piece of heat network related guidance there is since 2000, spanning both Institutes, also sitting on the Government’s RHI, MMSP, and SAP technical advisory groups.

The DATA

Twin plate HIU with advanced electronic control technology, independently tested to the BESA UK HIU standard, achieving the best efficiency of any HIU to date. The most common type of HIU in the UK.

  • 65kW Domestic hot water
  • 25kW Indirect central heating

The DATA Plus

Twin plate HIU based on the standard DATA HIU with the same advanced electronic control technology but with a greater hot water output.

  • 80kW Domestic hot water
  • 25kW Indirect central heating

The DATA Extra

Twin plate HIU with advanced electronic control technology, for larger Domestic / Commercial properties.

  • 65kW Domestic hot water
  • 80kW Indirect central heating

The DATA SPLIT

Twin plate HIU based on the standard DATA HIU with the same advanced electronic control technology and the added versatility of externally mounted serviceable components.

  • 65kW Domestic hot water
  • 25kW Indirect central heating

The SPLIT H.O.

Single plate HIU based on the DATA SPLIT HIU, providing central heating only. The SPLIT H.O. can be upgraded to a full DATA SPLIT HIU in the future, with minimal disruption.

  • 25kW Indirect central heating

The MIX

Single plate HIU based on the DATA SPLIT HIU, providing domestic hot water and direct central heating.  The MIX incorporates a mixing manifold which enables temperature control of a directly connected central heating system, unlike many direct HIU’s on the market.

  • 65kW Domestic hot water
  • 30kW Direct central heating

The DIGI

Single plate HIU, simple, efficient and cost effective. The most common type of HIU on the continent, providing domestic hot water and direct central heating.

  • 65kW Domestic hot water
  • 26kW Direct central heating

The DIGI Compact

Single plate HIU and perhaps the most compact HIU of its kind on the market, providing domestic hot water and direct central heating.

  • 65kW Domestic hot water
  • 26kW Direct central heating

The SLIM

Single plate HIU and perhaps the smallest HIU of its kind. The SLIM uses the same advanced control technology as the DATA HIU, providing domestic hot water only.

  • 60kW Domestic hot water

The SLIM plus

Single plate HIU and perhaps the smallest HIU of its kind. The SLIM Plus is based on the standard SLIM HIU but with a greater hot water output.

  • 65kW Domestic hot water

The SLIM Extra

Based on the SLIM HIU, this unit is fitted with an additional control valve and pipework to connect directly to the central heating system.  The SLIM Extra is fitted with a tamperproof steel casing, making it the ideal HIU for less secure environments.

  • 65kW Domestic hot water
  • 40kW Direct central heating

The Amazon HIU

Combined Hydraulic Interface Unit and Unvented Storage system, with optional Central Heating circuit.

  • Up to 150kW
  • 125 to 500 Ltrs of stored hot water
  • 25kW Direct or indirect central heating

The HiFlow DHW

Single plate high output HIU’s cater for your larger hot water requirements. These are available as individual units, but can also be frame mounted with several other HiFlow modules to create a modular substation. (see District heating substations)

  • 165kW Domestic hot water

The HiFlow CH

Single plate high output HIU’s cater for your larger central heating requirements. These are available as individual units, but can also be frame mounted with several other HiFlow modules to create a modular substation. (see District heating substations)

  • 125kW Indirect central heating

Specials

Not only do we have an extensive range of standard HIU’s but we also manufacture one-off specials, to suit your requirements.  Whether you need basic mechanical control, more than one heating output zone, or a combination of low and high grade heat on the primary circuit, we can help.

Speak to our team of experts to see what we can offer.

(Note: DHW Outputs based on 70°C Primary Flow & 10-50°C Secondary Temperatures – CH Outputs based on 70°C Primary Flow & 65-35°C Secondary Temperatures)

Talk to the experts – call us now on 0345 241 1441 or email enquiries@heatweb.co.uk

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