London's Dedicated HIU Specialists
In-house engineers servicing, repairing, installing and supporting compliance for Heat Interface Units across London — for residents, landlords, block managers and developers.
What We Offer
HIU Servicing London
Annual HIU servicing by manufacturer-approved engineers. Fixed pricing.
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.
Who we work with
Residents & homeowners
No heating or hot water from your HIU? Annual servicing? We work directly with residents across London.
Landlords
Keep your tenants warm and your HIU compliant with annual servicing, fast repairs and digital service records.
Block managers
Planned maintenance contracts, audit-grade records and a single accountable contractor for portfolios of any size.
Developers & RMCs
New-build HIU installations, replacement programmes, and Ofgem 2027 readiness for heat suppliers.
Why Heat-Plex
Heat Interface Units aren't boilers — they require specialist knowledge that most general plumbers don't have. Our in-house engineers are manufacturer-trained on the major HIU brands, hold Gas Safe registration, and operate from our Battersea base with same-day attendance across London.
- In-house engineers — no subcontractors
- Manufacturer-trained on Danfoss, Alfa Laval, SAV, Evinox and more
- Battersea HQ, all London within M25
- Same-day attendance, fixed-price servicing
- Award-winning, Safe Contractor approved, SAV approved
Heat network compliance is changing in 2027
From January 2027, Ofgem becomes the regulator for heat networks across England, Scotland and Wales — the first time in UK history that heat networks have had economic regulation comparable to gas and electricity. The regulation applies to communal heat networks (a single block of flats with shared plant) and district heat networks (multiple buildings on a shared network). Most blocks built in London since 2010 have a heat network and a Heat Interface Unit in every flat.
Read about heat network compliance supportFrequently Asked Questions
A compact wall-mounted unit that connects an individual property to a communal heat network or district heating system. It transfers heat from the network into the property for heating and hot water, replacing the role of a traditional boiler.
Related Services
HIU Repair London
Same-day HIU repair across London. All major brands. In-house engineers.
HIU Servicing London
Annual HIU servicing by manufacturer-approved engineers. Fixed pricing.
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.
HIU question, repair, service or install?
One call, one accountable contractor. Same-day attendance across London.
