New, white Inta Hiper II HIU with digital display showing 45°C, connected to plumbing with red and blue valves.

London's Premier HIU Service Provider

Regular HIU servicing is key to maximising your Heat Interface Unit's energy efficiency. It ensures consistent hot water and central heating, prevents leaks and lime scale buildup, and lowers overall energy bills. This essential step minimises HIU repair costs.

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Strategically Located Locally Connected

We are proud to provide comprehensive coverage across Greater London and the surrounding Home Counties, with a dedicated team of specialist engineers positioned to ensure rapid, reliable service wherever you are located.

Need an engineer on-site? Call us for rapid local support

020 3858 7959

Common issues we solve:

✔️ Water Temperature Fluctuations

✔️ Noisy Pipes & Banging (Water Hammer)

✔️ Radiators Not Getting Hot

✔️ Low System Pressure

✔️ Faulty Heat Meters

✔️ Uneven Floor Temperatures (Underfloor Heating)

✔️ Leaks & Dampness

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Our comprehensive HIU service includes:

✔️ Cleaning HIU strainers/filters

✔️ Visual and physical inspection of HIU components

✔️ Temperature checks for hot water central heating

✔️ Re-pressurising the expansion vessel

✔️ Central heating balancing (if necessary)

✔️ Application of F1 or X100 inhibitor (if required)

✔️ Underfloor heating balancing (if necessary)

✔️ Heat meter analysis

✔️ Flow rate analysis

✔️ Analysis of primary flow and return temperatures

✔️ KWH analysis

✔️ Historical leak inspections

✔️ HIU service certificate issuance

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Brands we work with

  • Danfoss HIU heat interface unit Specialist Installation and Replacement
  • Evinox HIU heat interface unit Specialist Installation and Replacement
  • Dutypoint HIU heat interface unit Specialist Installation and Replacement
  • Giacomini HIU heat interface unit Specialist Installation and Replacement
  • Herz HIU heat interface unit Specialist Installation and Replacement
  • Caleffi Altecnic HIU heat interface unit Specialist Installation and Replacement
  • Meibes Logotherm HIU heat interface unit Specialist Installation and Replacement
  • Modutherm MTA Eco HIU heat interface unit Specialist Installation and Replacement
  • Switch2 HIU heat interface unit Specialist Installation and Replacement
  • Tacanova HIU heat interface unit Specialist Installation and Replacement
  • INTA Intatec Hiper Smart HIU heat interface unit Specialist Installation and Replacement

Contact Us

Thank you for considering HIU Breakdown and Repairs for your hiu service and repair needs. We are a professional HIU Repairs, Maintenance and Installation Company serving London and the Home counties, providing efficient heating solutions for both private and commercial clients.

Please don't hesitate to reach out and let us know how we can help. We look forward to hearing from you.

Built on trust

  • UKDEA UK District Energy Association HIU Repairs Member
  • CHAS Elite Accredited HIU Specialist Conractor
  • UKATA Asbestos Trained HIU Engineers
  • Part P NIC EIC Accredited HIU Specialist Contractor
  • City and Guilds Accredited HIU Specialist Contractor

Why Choose Us?

Three people sitting on a couch and using a laptop and tablet together, with their hands pointing at the laptop screen booking one of HBR's many district heat network services.

  • We are the foremost provider of HIU servicing in London and its surroundings. Our strong track record showcases our commitment to excellence.

  • With years of experience, we've become experts in HIU service and repair. Our proven track record places us at the forefront of London's independent HIU service and repair industry.

  • Our team of HIU service engineers are trained to work on a wide range of Heat Interface Units, including renowned brands such as Caleffi, Danfoss, Logotherm, Evinox, and more. We keep them highly proficient through regular refresher courses provided by these manufacturers.