Intergas boilers.

What Intergas are good at

Fewer moving parts than almost anything else - no diverter valve, no plate heat exchanger. Less to fail is the whole design argument, and engineers who fit them tend to be evangelical.

What to watch

Much less common in the UK, so ask whether the engineers quoting you actually work with them.

Who they suit

People who have done their reading and want the simplest possible machine.

What a Intergas actually costs

£2,300 to £3,100 fitted for a like-for-like combi swap in an average home, including the appliance, the labour, the flue, standard controls and VAT.

You will see lower numbers quoted elsewhere. Those are almost always the price of the appliance alone, at trade, and no homeowner pays that. Treating the box price as the cost of a new boiler is the single most common reason people are shocked by their first quote. Moving the boiler, removing a cylinder or a system flush all sit on top - the cost guide breaks it down.

The honest bit

Between the brands on this site the differences are real but modest. Who fits it matters more than what they fit. A mid-range boiler installed properly will outlast a premium one installed badly, every time, and most early failures are installation rather than manufacturing.

Which is the argument for getting three engineers to look at your house and tell you what they would put in it. It is free, it takes thirty seconds, and it is the only way to find out what the job is actually worth.