HIU SERVICE IN LONDON
HIU Service Checklist
Our HIU servicing helps keep your Heat Interface Unit (HIU) efficient, reliable and safe, and can reduce the risk of breakdowns and high heating and hot water bills. We carry out HIU service in London across communal and district heating systems using a structured checklist, and we provide clear findings and recommendations after every visit.
Typical checks include:
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Filter/strainer cleaning (primary and heating return)
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Visual inspection for leaks, corrosion and signs of wear
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Performance checks for hot water and heating delivery
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Primary and secondary temperature readings (including DHW temperature stability)
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Differential pressure checks (where applicable)
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Valve/actuator function checks
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Expansion vessel checks and re-pressurisation
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Safety and electrical checks
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Pump settings verified (radiators/UFH)
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Heat meter check
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Software/parameter checks for electronic HIUs where applicable
We offer three HIU service packages: Standard, Advanced and Premium. A full list of what’s included in each package is shown in the Pricing section below.
Comprehensive service report and service certificate (PDF)
After the visit, we provide a comprehensive service certificate in PDF format, suitable for residents and managing agents. The certificate includes:
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HIU make/model (and serial number where accessible)
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Full checklist of checks completed
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Recorded readings (temperatures, pressures and Delta P where applicable)
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Photos taken during the service
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Any faults identified, recommended actions and next steps
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Engineer name, date, and the recommended next service date
Block HIU servicing and combined HIU + MVHR servicing
We offer discounted pricing for block HIU servicing and planned maintenance programmes. For buildings with MVHR systems, we can also provide combined HIU and MVHR servicing at a reduced cost by coordinating visits and reporting in one schedule. Contact us with the site address and number of apartments to receive a tailored quotation.
HIU SERVICE COST
20% Off Labour Cost For Returning Customers
- Fixed price
- 8am to 9pm Monday to Friday
- C charge & Parking Included
- HIU Service Certificate
- HIU identification
- Primary filter clean
- Hot water test
- Hot water temp checks
- Heating test
- Heating temp check
- HIU Leak inspection
- HIU corrosion inspection
- HIU control settings
- HIU parts inspection
- Pressure Top-up
- Fixed price
- 8am to 9pm Monday to Friday
- C charge & Parking Included
- HIU Service Certificate
- HIU identification
- Primary filter clean
- Hot water test
- Hot water temp checks
- Heating test
- Heating temp check
- HIU Leak inspection
- HIU corrosion inspection
- HIU control settings
- HIU parts inspection
- Pressure Top-up
- Cylinder check
- Multi-point Temp
- Heat meter test
- Communal flow log
- Primary flow rates
- Primary flow temp
- Isolation valves operation
- DPCV calibration
- PICV calibration
- Expansion vessel test
- Earth Continuity test
- Power switch test
- Fixed price
- 8am to 9pm Monday to Friday
- C charge & Parking Included
- HIU Service Certificate
- HIU identification
- Primary filter clean
- Hot water test
- Hot water temp checks
- Heating test
- Heating temp check
- HIU Leak inspection
- HIU corrosion inspection
- HIU control settings
- HIU parts inspection
- Pressure Top-up
- Cylinder check
- Multi-point Temp
- Heat meter test
- Communal flow log
- Primary flow rates
- Primary flow temp
- Isolation valves operation
- DPCV calibration
- PICV calibration
- Expansion vessel test
- Earth Continuity test
- Power switch test
- Inhibitor top-up
- Washers replacement
- Radiators venting
- Radiators balancing
- Underfloor Heating calibration
- Manifold pins free
- Actuators testing
- UFH controls test
HIU Group Servicing Discount
- Online Booking
- Advanced HIU servicing
- Card payments accepted online
- Online Booking System
- Advanced HIU servicing
- Multiple days
- Four times slots
- Ideal for group of neighbours
- Ideal for managing companies
- Online payment for private customers
- Online Booking System
- Advanced HIU servicing
- Multiple days
- Four times slots
- Online payment for private customers
Combined HIU & MVHR Servicing
- Fixed price
- Standard HIU Servicing
- Standard MVHR Servicing
- Fixed price
- Advanced HIU Servicing
- Standard MVHR Servicing
- Fixed price
- Premium HIU Servicing
- Full MVHR Servicing
Don’t just take our word for it
BOOK HIU SERVICE
Please fill in the form below and our Maintenance Coordinator
will contact you back shortly to complete the booking.