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
A yearly service helps your HIU run well and last longer. It also supports your warranty and accurate heat bills. We service single homes and groups of properties across London for residents, landlords, block managers and developers.
- Residents: yearly service and digital certificate
- Landlords: compliance support for blocks and peace of mind for tenants
- Block managers: planned servicing and clear records
- Developers: warranty support and handover records
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
We help block managers, resident management companies and freeholders plan HIU servicing across their properties. You get clear service records and one contractor to support your compliance work.
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 properties.
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.
