Heating Engineer
A heating engineer installs, services, and repairs central heating systems including boilers, radiators, and hot water systems. They ensure your home stays warm, safe, and energy-efficient all year round.
What does a heating engineer do?
Heating engineers work on a range of heating and hot water systems, including:
- Boiler installation, replacement, and upgrades
- Annual boiler servicing and safety checks
- Central heating system design and installation
- Radiator installation, balancing, and powerflush
- Unvented hot water cylinder installation (G3 qualified)
- Underfloor heating system installation (wet systems)
- Heating controls, smart thermostats, and zoning
- Fault diagnosis and repair of heating breakdowns
Is heating engineering regulated in the UK?
Yes, for gas work. Any engineer working on gas appliances must be registered on the Gas Safe Register — it is a legal requirement and the only official register for gas engineers in the UK. Working on gas without registration is illegal and dangerous.
Heating engineers working on unvented hot water systems must hold a G3 (also known as HWSS — Hot Water Safety and Systems) qualification. For oil-fired heating, engineers should be registered with OFTEC. As homes transition to low-carbon heating, many heating engineers are also training as heat pump installers.
While not legally required, membership of professional bodies such as the Chartered Institute of Plumbing and Heating Engineering (CIPHE) indicates additional professional commitment.
What to look for when hiring a heating engineer
When choosing a heating engineer, consider:
- Gas Safe registration — Check their Gas Safe ID card and verify it online. The card shows which gas appliances they are qualified to work on.
- Manufacturer accreditations — Engineers accredited by boiler manufacturers (Worcester, Vaillant, etc.) can offer extended warranties.
- Clear, itemised quotes — Heating work should be quoted with parts and labour clearly separated.
- Aftercare and warranties — Good engineers offer workmanship guarantees and are available for follow-up if issues arise.
- Reviews and recommendations — Heating is essential infrastructure. Choose someone with a strong track record.
Frequently Asked Questions
How much does a heating engineer cost?
An annual boiler service costs £45–£80. A new combi boiler installation costs £2,000–£4,000 including the boiler. A full central heating system for a 3-bed house costs £4,000–£7,000. Day rates for heating engineers are typically £200–£350.
How often should I service my boiler?
Boilers should be serviced annually. Regular servicing is a condition of most boiler warranties, helps maintain efficiency, and allows the engineer to identify potential safety issues early. A gas safety check (CP12 certificate) is a legal requirement for landlords every 12 months.