HIU Service London








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HIU services completed each year

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85 minutes

average travelling time from initial call to site


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first-time fix (OCT 2021)

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years of experience installing, servicing and repairing HIUs

Heat interface unit specialists

Quality HIU Service in London

HIU Breakdownandrepairs Ltd have gained an outstanding reputation over the years for providing exceptional HIU service in London and surrounding areas. Our friendly HIU service engineers take pride in resolving faults and repairing Heat Interface Units smoothly and at a low cost.

Heat Interface Unit (HIU) service and repair in london is something we have been performing for a substantial period of time. This has allowed us to become one of London's leading independently-run HIU service and repair company.

Our HIU service engineers are fully trained to work on the industries leading models of Heat Interface Unit. This includes Caleffi, Danfoss, Logotherm, Evinox and many other models. We frequently attend refresher courses on many of these Heat Interface Units brands, which keeps our engineers up-to-date and highly competent in this field.

For a comprehensive HIU service in London and surrounding areas, call 020 3858 7989.


Service enquiry


Heat interface unit

Regular HIU service is the best way to ensure your Heat Interface Unit consumes energy in the most efficient manner.

There are many benefits to a regular Heat Interface Unit service including adequately hot water and central heating, no leaks or build-up of lime scale, and lower energy bills overall. It is also a great way to catch any defective parts before they do break.

Our HIU service procedure

  • HIU strainers / filters cleaned
  • HIU components visual and physical inspection
  • Hot water and central heating temperature checks
  • Fibre washer replacement
  • Expansion vessel re-pressurised
  • Central heating balanced

  • Underfloor heating balance
  • Heat meter analysis
  • Flow rate analysis
  • Primary flow and return temperature analysis
  • KWH analysis
  • Historical leak inspections
  • HIU service certificate produced


For HIU maintenance in London by reliable engineers, call 020 3858 7989.



Group HIU service

HIU Breakdownandrepairs Ltd offers discounted block bookings for Heat Interface Unit service in London and surrounding areas to suit your needs. A minimum of 5 Heat Interface Units is required to qualify for the discount.

Our friendly staff will allocate a time and date to perform the maintenance. On completion of each Heat Interface Unit service, two certificates will be issued. All our HIU service engineers are fully trained and vetted. Our engineers also come equipped with the latest software for Caleffi, Evinox and Intactec heat interface units.


Heat Interface Units Service Plan


service plan

Our HIU maintenance package allows you to relax and let us take care of problems you're experiencing with your Heat Interface Unit.

All for a fee of just
a month

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Free HIU repair call outs

If you're experiencing on going issues with your Heat Interface Unit, we will not charge you for any call outs between the hours of 8am and 8pm Monday to Friday.

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Free yearly HIU inspections

Our team of engineers will service your Heat Interface Unit free of charge annually, including the replacement of parts up to the value of £200.

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Priority HIU booking and reminders

You'll qualify for priority booking of appointments and reminders prior to the date of your scheduled HIU service. 

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Hassle free

By joining the service plan, you eliminate the stress of finding an engineer nearby. We will send a fully qualified and well experienced Heat Interface Unit engineer to you free of charge, between the hours of 8am and 8pm, Monday to Saturday.





An HIU service you can trust

  • Trusted and experienced team of HIU engineers
  • One of London’s leading HIU service and repair companies
  • Smart HIU plugin software available
  • Caleffi and SAV HIUs Trained
  • Spare parts stocked and competitive rates
  • First time diagnostics and repairs
  • 12 month guarantee on all work undertaken

Make an appointment 


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Does your HIU unit need fixing fast? Contact HIU Breakdownandrepairs for quick, good-quality HIU repairs by experienced engineers.
Call 020 3858 7989

Alternatively leave us a message and we will be back in touch as soon as possible.

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Company Registration No: 11648424
VAT registration number: 
338 9679 35

 Hiubreakdownandrepairs ltd
20-22 Wenlock Road
N17 GU

Terms and Conditions

 Business Hours: 
Mon- Fri: 8:00 AM-21:00 PM
Sat: 9:00 AM-20:00 PM
Sun: Closed