From urgent HIU breakdowns to planned annual servicing — we're the specialist your managing agent or housing provider should already have on speed dial.
Same-day response available: 020 8855 8350
Heat Interface Units are complex pieces of equipment — and when yours fails, it often means no heating and no hot water. We understand the urgency, which is why HIU fault diagnosis, repair and servicing is a core part of what we do. We work across district heating networks throughout London, covering all major HIU manufacturers. Our engineers are Gas Safe registered and trained specifically on HIU systems.
Pinpoint the exact fault quickly — we carry common parts to resolve most systems in a single visit.
Regular HIU servicing keeps your system efficient, your warranty valid, and your bills lower.
Scaling and fouling are the most common HIU failures. We replace heat exchangers across all major makes.
Zone valves, flow control valves and thermostatic controls diagnosed and replaced by certified engineers.
Restore circulation and efficiency with professional powerflush treatment for blocked or sludged systems.
Annual service records, safety certificates and engineer reports for responsible landlords.
Full bathroom installations, showers, baths and sanitaryware fitted to a high standard.
New radiator installation, replacement, TRV upgrades and balancing for even heat distribution.
Emergency leak detection and repair, including trace-and-access and insurance-ready reports.
Unvented and vented hot water cylinder repair, replacement and G3 compliance certification.
Annual boiler service to keep your system safe, efficient and warranty-compliant. Gas Safe certified engineers.
Supply and installation of new gas boilers — combi, system and regular — with full commissioning and Gas Safe certification.
We're not a box-ticker. A hands-on team with real project experience, real accreditations, and a reputation we protect on every job.
Heat Interface Units are our domestic specialism. We diagnose fast, carry spares, and resolve most faults in a single visit.
No heating or hot water is urgent. We prioritise emergency call-outs and aim for same-day attendance.
Gas Safe registered, full public liability and employer's liability insurance.
Available around the clock, every day of the week, for genuine emergencies.
Whether it's a heating emergency, an annual service, or a bathroom refit — we want to hear from you.