HIU Service London
Annual servicing and planned maintenance for Heat Interface Units across London. Manufacturer-approved engineers. Fixed-price, no hidden extras.
Who needs HIU servicing
Annual servicing keeps HIUs efficient, prolongs their life, and supports warranty and heat-network billing accuracy. We work with residents, landlords, block managers and developers across London — booking single-flat services or running portfolio-wide programmes.
- Residents — annual service, digital certificate
- Landlords — block compliance and tenant peace of mind
- Block managers — planned maintenance contracts and audit-grade records
- Developers — warranty preservation and handover documentation
Why servicing matters
Efficiency
Clean exchangers and calibrated controls deliver peak performance.
Warranty
Manufacturers require evidence of annual servicing.
Regulation
Audit-grade service records support 2027 heat network compliance.
Billing accuracy
Properly serviced HIUs underpin accurate residential heat billing.
What's included in an HIU service
Inspection
Full visual and operational inspection of the unit, isolation valves and pipework.
Performance checks
Flow temperatures, return temperatures, hot-water performance and modulation.
Safety checks
Pressure-relief, expansion vessel, electrical isolation and fault-code review.
Component checks
Plate exchanger condition, sensors, motorised valves and pumps.
Service record & certificate
Digital service certificate suitable for warranty, landlord compliance and block records.
Planned Maintenance Contracts
Block managers, RMCs and freeholders: we run portfolio-wide HIU servicing programmes with audit-grade records and a single accountable contractor — exactly what you need ahead of Ofgem 2027 regulation.
See compliance supportHIU brands we service
Manufacturer-approved engineers across the major HIU brands.
Danfoss
Full annual service and repair.
Alfa Laval
Plate exchanger specialists.
SAV Systems
SAV approved.
Evinox
Approved service provider.
Heatrae Sadia
Service and parts.
Other brands
Most other brands covered — contact us to confirm.
Frequently Asked Questions
Annually, at minimum. Many block management companies and developer warranties require it. Annual servicing maintains efficiency, prolongs the unit's life, and supports heat-network billing accuracy.
Related Services
Heat Interface Unit
London's dedicated HIU specialists — servicing, repair, install and compliance.
HIU Repair London
Same-day HIU repair across London. All major brands. In-house engineers.
HIU Installation London
New-build and replacement HIU installations. Developers, RMCs, individual flats.
Heat Network Compliance Support
Ofgem 2027 readiness for heat suppliers, block managers and developers.
Book your HIU service
Fixed-price servicing across London. Manufacturer-approved engineers and digital service records.
