Heat Interface Units (HIU)
HIU installation, servicing, fault diagnosis and repair for flats and developments on communal and district heating networks.
Heat interface units are a core specialism. We understand communal heating inside-out, so residents get reliable heat and hot water, and managing agents get a contractor who knows the systems.
HIUs deliver heating and hot water to individual flats from a communal or district heating network. When they're set up and maintained well, they're efficient and quiet; when they're not, you get lukewarm water, noise and call-outs.
We install, service and repair all common HIU makes, optimise performance, and work with managing agents on planned maintenance across whole blocks.
What we cover
- HIU installation for new & existing flats
- Annual HIU servicing & optimisation
- Plate heat exchanger descaling
- Fault diagnosis & repair
- Communal / district heating expertise
- Block-wide planned maintenance
Common questions
Do you work with managing agents on whole blocks?
Absolutely. We handle block-wide HIU servicing and planned maintenance, with clear reporting for managing agents and freeholders.
My hot water is slow or lukewarm. Can you help?
Often yes. Poor HIU performance is frequently down to scaling, settings or a worn component, all things we diagnose and put right.
Communal heating, properly understood.
HIU installation, servicing, fault diagnosis and repair for flats and developments on communal and district heating networks.
Signs it's time to get in touch
Spotted one of these? It's worth a quick call. Early attention usually means a simpler, cheaper fix.
- Lukewarm or slow hot water at the tap
- Temperatures that fluctuate or cut out
- A noisy or knocking unit
- Higher-than-expected heat-network bills
- An HIU that has never been serviced
- Repeated complaints across a block
Why homeowners & managers choose us
Gas Safe registered
Every gas job carried out and certified to current regulations (535881) by qualified engineers.
Genuine specialists
Real depth on boilers and HIUs means quicker diagnosis, cleaner work and fewer return visits.
Fair, fixed pricing
A clear, fixed quote before we start. No hidden extras, no surprises and no pressure.
No heat or hot water? Let's sort it.
Gas Safe registered engineers across South-East London. Free quotes, fair prices, fast response.