Buying a boiler in 2026, honestly.

The first house has a boiler that has just died in November, radiators that were fine before it broke, and a family who need hot water tomorrow. A same-week like-for-like replacement is almost always the correct answer here; the moment is not the moment to redesign the heating strategy, and there is nothing to be gained by shivering through the decision.

The second house has a boiler over ten years old that is still working. The homeowner is thinking about it because a service engineer mentioned the age, or because the neighbours have started talking about heat pumps. This is the house where the interesting decision lives; there is time to model both paths honestly before committing.

The third house has already decided on a heat pump and is now trying to work out whether to bridge to it with one more boiler or make the switch at this replacement. The right answer depends less on the boiler and more on the fabric of the building, the electrical supply and the installer market locally.

Gas prices sit at a different level to a decade ago and are now subject to volatility every European winter. That is not a prediction; it is the trading pattern of the last three years, and it changes the running-cost sum a boiler needs to win on. It hasn't made gas obviously uneconomic; it has narrowed the margin.

Heat pump grant support in the form of the Boiler Upgrade Scheme is now a defined and reasonably durable piece of policy, and the published Electrification of Heat trial evidence shows the technology works across the British housing stock when installed well. The combination has moved heat pumps from "experimental" to "an alternative worth costing", which is a meaningful category change even if it isn't a universal recommendation.

The condensing boiler itself has stopped improving in ways that matter. Efficiency has been sitting at 92 to 94 percent seasonal for over a decade; there is nothing dramatic to wait for in the boiler category itself. The one recent change worth noting is that flow-temperature commissioning has become better understood and is worth insisting on regardless of the fuel choice.

The house that leans towards another boiler tends to have a solid-fuel-era radiator layout that runs hot, an emissions strategy that has never been rebalanced, an electrical supply that would need upgrading, and a homeowner who values keeping the current arrangement running with minimal disruption. That's a legitimate profile; a good condensing boiler installed with proper flow-temperature commissioning is a defensible choice for it.

The house that leans towards a heat pump tends to have some existing insulation, radiators that were either upsized in a previous refurb or can be at this one, a garden or wall for the outdoor unit that isn't next to a bedroom window, and a homeowner with the appetite to spend a Saturday learning how the controls work. That's the profile the Electrification of Heat evidence best supports.

The house that leans towards a bridging boiler tends to be mid-refurb, waiting on insulation or window work, and doesn't yet have the fabric that would let a heat pump land well. A short-service replacement gas boiler with a plan to revisit at the end of the fabric works is the pragmatic answer here.