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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 SLIM Plus HIU is possibly the smallest and most efficient DHW generation unit on the market, using the latest electronic stepper motor controls to provide instantaneous DHW. A flow sensor allows the electronics to respond rapidly to changes in DHW flow rate, maintaining steady output temperatures with very little fluctuation.


HIU Type Hot Water Only
Hot Water Configuration Indirect
Heating Configuration N/A
Heating Temperature Control N/A
Built-in Heat Meter No
Dimensions – HIU Case (mm) 240 (W) x 420 (H) x 90 (D)
Dimensions – inc. Plumbing Jig (mm) 240 (W) x 560 (H) x 90 (D)
Heating Output (nominal) N/A
Hot Water Output (nominal) 80kW


The SLIM Plus comes in an attractive EPP casing with remarkably low heat losses less than 2W. All pipework connections are bottom entry and a pre-plumbing jig is available as an option. A number of optional extras are available, as shown below.



  • Decorative white steel casing wrap
  • Various heat meter models (for mounting external to casing)
  • Landlord security valve or relay kit (for mounting external to casing)
  • DHW recirculation pump kit (for mounting external to casing)
  • Water hammer arrestor (for mounting external to casing)
  • Differential pressure control valve for >2.5 bar ΔP (for mounting external to casing)
  • ModBus communication module (for mounting external to casing)


SLIM Datasheet   SLIM Installation Instructions


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