Why Annual HIU Servicing Is Essential for Apartment Buildings

Many apartment buildings in London rely on communal heating systems with Heat Interface Units (HIUs) installed inside each flat. Just like boilers, HIUs require regular servicing to maintain efficiency and reliability.

What Happens During an HIU Service
During a professional HIU service engineers typically:

• Inspect internal components
• Clean system strainers and filters
• Check sensors and actuators
• Test heating and hot water performance
• Inspect pressure levels and safety components

A service certificate is usually issued after the inspection.

Benefits of Regular Servicing

Regular servicing helps:

• prevent hot water failures
• improve heating efficiency
• extend the lifespan of the HIU
• detect faults early
• maintain manufacturer warranty requirements

Servicing is especially important in buildings where many HIUs connect to the same communal system.

Problems Caused by Poor Maintenance

Without servicing, HIUs can develop:

• blocked heat exchangers
• faulty sensors
• stuck valves
• reduced hot water pressure

These issues can lead to expensive repairs if left untreated.

R&B London HIU Engineers provide professional HIU servicing across London, helping residents and managing agents maintain reliable communal heating systems. To book a service, please call 0800 195 6468 or simply click here.