Need an urgent repair for your heat interface unit?
Our team qualified and accredited technicians is ready to assist
Our HIU engineers have expertise and experience in the repair of HIUs, with accreditation for repairing Redan-Danfoss SAV systems. We’ve also tackled repair work on numerous other brands. Regular and periodic maintenance is performed for our clients to ensure their HIUs are well cared for minimising the risk of leaks and breakdowns. Our engineers are also repair specialists, equipped with the knowledge to correctly diagnose hot water and heating issues, conduct necessary repairs on the first visit and recommend the replacement of appropriate parts
What is a Heat Interface Unit (HIU)?
Heat Interface Units (HIUs) bear a resemblance to a regular wall mounted boiler and share a similar pipework setup with a combination boiler but they are usually part of a larger heat network
They bridge the gap between the central or communal boiler and the outlets within the property, such as radiators, underfloor heating, showers, kitchen taps and other hot water outlets in each unit. This eliminates the need for individual gas boilers in each unit and enhances overall network efficiency
An additional benefit is the absence of a need to install and run individual gas pipes to each unit. Unlike a gas boiler that typically requires installation on an exterior wall or a lengthy flue terminal a HIU can be positioned centrally or anywhere else as it generates no combustion by-products that need to be expelled into the outside air
What does a HIU repair cost?
Our competitive prices start from £75 + VAT for regular maintenance and common HIU repairs. Get in touch with us today for more information.
What are the signs my HIU requires repair?
Signs that your heat interface unit requires repair include loss of hot water, inconsistent or intermittent hot water, unusual noises or vibrations and poor heating performance. If you observe any of these symptoms you should have your HIU inspected by a professional.
What other related services do you provide?
Smart Heating Controls:
Smart Heating Controls are intelligent thermostatic controls for your heating system. You can remotely control your heating from a smartphone, tablet, or other internet-connected device that is wirelessly connected to the internet. They also help save money on your heating bills because you have more control over your heating. Additionally, you have individual room temperature control. By not heating unused spaces, you have more opportunities to reduce your heating costs. Most common smart heating controls include thermostats and TRVs
Heat Detectors:
Installation of wires, mains and interlinked heat detectors where a smoke alarm isn’t suitable. Heat detectors are important equipment for detecting fires and ensuring safety. As the name suggests, the devices sense the temperature of a room or area in order to detect fires. Heat detectors work on a similar principle used by smoke detectors, by tracking the temperature instead of smoke.
Smoke Alarm:
Installation of mains wired and interlinked smoke alarms, for homes, apartments, HMOs and businesses. Smoke alarms are a legal requirement for rental properties but a must have for all homes and businesses to protect lives
Power flushing:
A method of deep cleaning your central heating system, including pipework, radiators and boiler. Power flushing improves the quality of the water contained within the system by removing the sludge and rust build up that can cause boiler breakdown or long term damage to your boiler and radiators.
Magnetic Filters:
A device that collects debris and rust from the heating system. It can prevent damage to the boiler, leaking radiators and sludge build up within the central heating system.
Boiler Servicing:
An annual boiler service is carrying out a series of checks and cleaning to the boiler in order to maintain and increase the life of a boiler. It is also a requirement by the manufacturer to honour any boiler guarantees.
Boiler Installation:
We provide a variety of Gas Boiler installations including Heat Only, System Boilers and Combi Boilers. We are experienced and registered installers of all major brands such as Idea, Baxi, Main, Vaillant, Keston and many more.
Plumbing and heating:
All aspects of plumbing and heating repair, installation and servicing
Unvented Cylinders:
Installation direct and indirect unvented cylinders. We are experienced in unvented cylinders as part of gas boiler installation, a HIU installation or stand alone electric Unvented cylinders.
Frequently Asked Questions
Can I repair my heat interface unit myself?
Heat interface units are intricate systems that require repair by an individual with specialised training and knowledge. Unless you possess the necessary expertise we do not recommend attempting to repair your HIU on your own. It’s better to seek help from a professional service provider
What are common issues with heat interface units?
Common problems with heat interface units include faulty valves, seized or faulty pumps and leaks or other piping issues. These problems can be caused by a variety of factors, including normal wear and tear, corrosion and lack of maintenance
What can I do if my HIU is beyond economical repair?
When your HIU can no longer be repaired we are able to offer replacement of your HIU
What if parts are no longer available for repairing a HIU?
When your HIU can no longer be repaired we are able to offer replacement of your HIU
How long will a heat interface unit typically last?
With appropriate maintenance and care, heat interface units can last for a significant number of years. The lifespan of a HIU can vary depending on factors such as the quality of the unit, the level of maintenance it receives, and the local weather conditions.
Can a heat interface unit be retrofitted to an existing building?
Yes, a heat interface unit can be installed in an existing structure. This would involve the installation of the HIU and necessary pipework within the building, as well as connecting it to a central plant such as a boiler or district heating system
What does a heat interface unit repair involve?
A typical repair of a HIU could involve replacing or fixing faulty components, cleaning the inner filters, re-pressurising the system, and ensuring the controls and safety devices are working correctly. In more severe cases, our technicians may recommend a comprehensive repair which could involve the removal and descaling of one or both of the plated heat exchangers
How much does it cost to repair a heat interface unit?
The cost of repairing a heat interface unit will depend on the nature and extent of the repairs needed. Contact us for a quote based on your specific requirements
How much does it cost to replace a heat interface unit?
The cost of replacing a heat interface unit can vary depending on the complexity of the unit, as well as the labour and materials required. For a detailed quote based on your specific needs, please contact our team
Can you install a heat interface unit in a new construction?
Yes, a heat interface unit can be installed during the construction of a new building. This involves designing and installing the necessary pipework and connecting the HIU to a central plant like a boiler
What are the advantages of a heat interface unit?
Heat interface units offer several benefits, including improved energy efficiency, reduced maintenance costs, and independent control over heating and hot water for each unit. HIUs can also be linked to renewable energy sources, further enhancing their energy efficiency.
Are heat interface units energy efficient?
Heat interface units can be highly energy efficient as they allow for independent control of heating and hot water in each unit. This means that instead of constantly heating a central system for an entire building, units are only heated when required. Furthermore, HIUs can be linked to renewable energy sources, enhancing their energy efficiency even more.
Are heat interface units noisy?
While heat interface units can produce some noise during operation, this is usually minimal and should not be disruptive. If you notice excessive noise from your HIU, it could indicate an issue requiring professional attention
Do heat interface units require a lot of maintenance?
While HIUs do require some maintenance to function effectively and efficiently, their maintenance needs are typically less than those of traditional central heating systems. This maintenance may include annual servicing and routine inspections and cleanings
How can I tell if I have a HIU or a combi boiler in my property?
The presence of a gas supply can be a good indicator. Combi boilers require a gas supply to operate and an external flue to expel fumes. A HIU unit, on the other hand is not connected to a gas supply and does not have a flue
Why do I have hot water but the heating is not working on my HIU?
Common causes for the heating not working on HIUs include seized parts and components. Due to inactivity during the summer months, parts such as the pump can seize, causing the heating not to circulate while the hot water remains functional. Turning your heating on a few times over the summer to exercise these parts can be a good preventative measure
My HIU has been serviced but I still have no heating or hot water?
This could be an issue with the central or communal boiler system. HIUs depend on a central boiler for their hot flow source. If the central boiler is malfunctioning and unable to supply hot water, your HIU will not be able to function. It’s best to have your building’s heating system checked for any issues in this case
How can I detect if my heat interface unit needs repair?
Indicators that your heat interface unit may require repair include a diminished flow of hot water, unusual noises or vibrations, or subpar heating performance. If you notice any of these symptoms, it’s recommended to have your HIU inspected by a professional technician.
Is it possible for me to repair my heat interface unit on my own?
Due to the complexity of heat interface units, repair work should be handled by individuals with specialized expertise and training. Unless you possess the necessary skills and knowledge, it’s not advised to try to repair your HIU yourself. Instead, it’s recommended to seek help from a professional service provider
What are the common issues associated with heat interface units?
Some of the common problems with heat interface units include diminished hot water flow, substandard heating performance, and leaks or other piping issues. These problems can result from a variety of factors, such as routine wear and tear, corrosion, or inadequate maintenance
How frequently should I have my heat interface unit serviced?
For optimal efficiency and performance of your heat interface unit, it’s recommended that you have it serviced at least once a year. If you observe any issues with your HIU, such as diminished hot water flow or substandard heating performance, it’s advised to have it serviced as soon as possible
What is the expected lifespan of a heat interface unit?
With appropriate care and regular maintenance, heat interface units can last for many years. However, the lifespan of an HIU can vary depending on several factors, including the quality of the unit, the level of maintenance it receives, and the local climate
What are the benefits of a heat interface unit?
Heat interface units offer several advantages, including enhanced energy efficiency, reduced maintenance costs, and individual control of heating and hot water for each unit. Furthermore, HIUs can be linked to renewable energy sources, further boosting their energy efficiency.