Air source heat pumps, what to know
A heat pump extracts heat from outside air even in cold weather, and typically runs at a lower flow temperature than a gas boiler, which usually means larger radiators or underfloor heating for the same comfort level. Installation is a bigger job than a boiler swap and government grant schemes (like the Boiler Upgrade Scheme) can offset some of the cost.
Three steps to hiring the right heating engineer
First, confirm Gas Safe registration and ask to see the ID card, which lists exactly what gas work they're qualified for. Second, get a written quote naming the boiler model. Third, ask what the manufacturer's warranty requires (usually an annual service) to keep it valid.
How long should a boiler last, and when to replace vs repair
Most boilers last 10-15 years with regular servicing. As a rough guide, if a repair would cost more than a third of a new boiler's price, or the boiler is over 10-12 years old and parts are getting harder to source, replacement is usually the better long-term value than another repair.
Shared heating systems in flats and conversions
Some converted properties share a communal boiler or heating system rather than each flat having its own — check which applies before booking, since a fault or upgrade on a shared system usually needs freeholder or management company involvement, not just your own arrangement.
Boiler cover and service plans
Separate from a manufacturer's warranty, some homeowners take out an annual boiler cover plan (often through an energy supplier) that includes servicing and breakdown cover. Worth checking what's already included in a recent warranty before paying for overlapping cover.
Common heating engineer jobs
Heating engineers install, service and repair boilers and central heating systems: annual boiler services, fault diagnosis, radiator installation and balancing, powerflushing, and full system replacements. Many also work on unvented hot water cylinders and, increasingly, heat pumps and other low-carbon heating.
Combi vs system vs conventional boilers
A combi heats water on demand with no tank or cylinder, suits smaller properties with one bathroom. A system boiler uses a hot water cylinder but no cold water tank, better where several taps might run at once. A conventional (regular) boiler uses both a tank and cylinder, common in older or larger properties, or where mains pressure is poor.
Why Gas Safe registration is a legal requirement
Anyone installing, servicing or repairing a gas appliance or gas pipework in the UK must by law be on the Gas Safe Register, which replaced CORGI in 2009. This covers boilers, gas fires and gas cookers. Using an unregistered engineer for gas work isn't just risky, it's illegal, and any resulting certificate isn't valid.