What are the alternatives to gas central heating boilers?

There are five that work in a British home. An air source heat pump, which is the mainstream replacement and carries a £7,500 government grant. A ground source heat pump, which is more efficient but needs land. Solar thermal panels, which cover hot water but not heating. Electric boilers and radiators, which are simple to fit but expensive to run. And a modern condensing gas boiler, which is still legal, still available, and still the right answer for a lot of older or poorly insulated homes.

Is there a grant for replacing a gas boiler?

Yes, for heat pumps. The Boiler Upgrade Scheme pays £7,500 towards an air or ground source heat pump in England and Wales, rising to £9,000 for homes heated by oil or LPG where the installation completes between 21 July 2026 and the end of March 2027. There is no grant for replacing a gas boiler with another gas boiler. Your MCS certified installer claims it and discounts it from the invoice, so you pay the net figure.

Alternatives to Gas Central Heating Boilers in 2026

Q: Are gas boilers being banned in the UK?

Not in existing homes. The Future Homes Standard, which comes into force on 24 March 2027, applies to newly built homes and will make low carbon heating the norm in new build. There is no rule requiring you to remove a working gas boiler from an existing house, and replacement gas boilers remain legal to buy and install. If your boiler fails in 2027 you will still be able to replace it with another gas boiler.

Q: What is the cheapest alternative to a gas boiler?

To buy, a modern condensing gas boiler is far cheaper upfront than anything else. To run, an air source heat pump is usually cheapest in a well insulated home on a heat pump electricity tariff. The gap closes on a standard tariff, because electricity costs roughly four times what gas does per unit, so a heat pump running at 300 to 400 per cent efficiency lands close to a good gas boiler rather than far below it. The £7,500 grant is what changes the sums.

Q: Can I replace a combi boiler with a heat pump?

Yes, but it is not a like-for-like swap. A combi makes hot water on demand and a heat pump does not, so you need somewhere for a hot water cylinder, usually an airing cupboard or loft. Radiators often need upsizing too, because a heat pump runs at a lower flow temperature than a combi. Both are normal parts of the job and both get costed at the survey, before you commit.

Q: Do heat pumps work in old houses?

They can, and plenty of Victorian and interwar Yorkshire houses run on them well. What decides it is heat loss, not age. If the loft and cavities are insulated and the radiators can be sized correctly, a heat pump works. If the fabric is leaky and there is no realistic way to fix it, a condensing gas boiler is the honest recommendation and we will say so at the survey rather than sell you the bigger job.

There are five realistic alternatives to a gas central heating boiler in 2026: an air source heat pump, a ground source heat pump, solar thermal panels, electric boilers and radiators, and a modern condensing gas boiler. Only heat pumps attract the £7,500 government grant. Only heat pumps cut both bills and carbon in most homes. And, contrary to a great deal of what is written about this, no one is going to make you take your gas boiler out.

We install both. We are Gas Safe registered (registration 623525) and MCS certified, we heat our own building with a wood pellet biomass boiler and solar thermal, and we quote heat pumps and gas boilers side by side so you can see the two numbers together. What follows is the comparison we would give you at the kitchen table.

A person researching alternatives to gas central heating on a laptop at home

The five alternatives, compared

Option	Heats the whole home?	Hot water?	Grant	Running cost vs gas	Best suited to
Air source heat pump	Yes	Yes	£7,500	Lower on a heat pump tariff, similar on a standard one	Insulated homes with space for a cylinder
Ground source heat pump	Yes	Yes	£7,500	Lowest of any option	Homes with garden or land for a loop
Solar thermal	No	Partly	No	Cuts hot water cost only	South facing roofs, as a second measure
Electric boiler or radiators	Yes	Yes	No	Highest	Flats, no gas supply, single rooms
Modern condensing gas boiler	Yes	Yes	No	Baseline	Older or hard to insulate homes, tight budgets

The honest summary of that table: if your home is reasonably insulated and you have somewhere to put a hot water cylinder, an air source heat pump is the alternative worth taking seriously. If it is not, a new condensing boiler will serve you better than a heat pump fitted into the wrong house, and anyone who tells you otherwise is selling.

1. Air source heat pumps

An air source heat pump sits outside the property and extracts heat from the outside air, even in winter, then upgrades it to a useful temperature for your radiators and hot water. It runs on electricity but it does not make heat the way an electric heater does, it moves heat, which is why it can deliver three to four units of warmth for every unit of electricity it draws.

An air source heat pump installed outside a Yorkshire home by BASI Heating

That efficiency figure is where most articles stop and where the useful part actually starts. Electricity costs roughly four times what gas does per unit. So a heat pump running at 300 per cent efficiency against a condensing boiler running at 90 per cent lands somewhere close to level on a standard tariff, not dramatically below it. Move to one of the heat pump electricity tariffs and the running cost drops properly. That is the single most important thing to understand before you commit, and it is the question we get asked least often.

What it needs from your home: somewhere outside for the unit, an airing cupboard or loft space for a hot water cylinder, and radiators sized for a lower flow temperature. Insulation matters more than the age of the house.

Pros

The only option with a £7,500 grant behind it
Cuts carbon substantially, and keeps cutting it as the grid gets cleaner
Heats the whole home and the hot water, so nothing else is needed
No combustion in the house, so no flue and no annual gas safety concern

Cons

Higher upfront cost than a boiler even after the grant
Needs outside space and a cylinder inside
Radiators often need upsizing
Running cost only clearly beats gas on the right electricity tariff

Our air source heat pump installation page covers what we fit, and the Boiler Upgrade Scheme guide covers the grant rules in full, including the EPC requirement that was dropped in April 2026.

2. Ground source heat pumps

The same principle, but the heat comes from the ground rather than the air. Ground temperature barely moves across the year, so a ground source heat pump runs more efficiently than an air source one and runs at its best precisely when you need it most, in January. It is the lowest running cost of anything on this page.

The catch is the groundwork. You need either a horizontal loop, which wants a decent amount of garden dug up, or a vertical borehole, which does not need the space but costs considerably more. That rules it out for most terraces and semis and makes it a genuine option for detached and rural properties. The same £7,500 grant applies.

3. Solar thermal

Solar thermal is often confused with solar PV. PV makes electricity. Solar thermal makes hot water, and only hot water. Collector panels on the roof heat a fluid, which is pumped through a coil in your cylinder.

Solar thermal collector panels heating water on a house roof

Used properly it will cover a large share of a household’s hot water across the summer and contribute in spring and autumn. It will not heat your radiators and it will not carry you through a Yorkshire December on its own. Treat it as a second measure that reduces the load on whatever your main system is, not as an alternative to central heating. It pairs particularly well with a hot water cylinder and with a heat pump.

4. Electric boilers and radiators

An electric boiler heats water for a conventional radiator circuit using an immersion element, exactly like a giant kettle. Electric radiators and panel heaters skip the water entirely and heat each room directly.

Both are close to 100 per cent efficient at the point of use, which sounds excellent until you compare it with a heat pump at 300 to 400 per cent. Every unit of heat costs you a full unit of electricity, at roughly four times the unit price of gas. That makes electric the most expensive way to heat a house on this list by a clear margin.

Where it genuinely makes sense: flats with no gas supply, small and very well insulated properties, holiday lets used occasionally, and single rooms such as a converted garage or a home office where running a new heating circuit is not worth it. Where it does not make sense: as a whole house replacement for a working gas system, on cost grounds alone.

5. A modern condensing gas boiler

It belongs on this list because for a great many Yorkshire homes it is still the right answer, and because “alternative to a gas boiler” often really means “my boiler is failing and I want to know my options”.

If your current boiler is fifteen years old and non-condensing, replacing it with a modern A-rated condensing boiler is the cheapest meaningful efficiency gain available to you. An old boiler can waste over 30 per cent of the gas you pay for. A new one wastes under 10. That is a real saving, delivered for a fraction of the upfront cost of a heat pump, in a day, with no cylinder to find room for and no radiators to change.

It is not the greener answer and we will not pretend it is. But a condensing boiler fitted well into a house that suits it beats a heat pump fitted badly into a house that does not, every time. See new boiler installation for what that costs, or boiler ratings explained for how the efficiency bands work.

Where the rules actually stand in 2026

This is where most of the confusion sits, so plainly:

Existing homes: no ban. There is no rule requiring you to remove a working gas boiler, and no date after which you cannot replace one. If your boiler dies in 2028 you will be able to fit another gas boiler.
New build homes: changing. The Future Homes Standard comes into force on 24 March 2027 and makes low carbon heating the norm in newly built homes. It governs what developers install in new dwellings, not what you do in a house that already exists.
The grant is the real policy lever. Rather than banning boilers, the government is paying people to choose heat pumps. The Boiler Upgrade Scheme is £7,500, rising to £9,000 for oil and LPG homes where the install completes between 21 July 2026 and March 2027, and it runs to 2030.

If you have read that gas boilers were being banned in 2025, that was an earlier new build proposal that has since moved. It never applied to existing homes.

Which alternative is right for your home?

There is no answer that is right for every property, and the honest version depends on four things: how well the fabric holds heat, whether there is space for a cylinder, what you can spend upfront, and how long you plan to stay.

A short way through it:

Well insulated, room for a cylinder, staying put: air source heat pump, with the grant.
Detached with land, and you want the lowest running cost: ground source heat pump.
Old, leaky, or a tight budget and a dead boiler: condensing gas boiler now, insulate, revisit heat pumps at its end of life.
Flat or no gas supply: electric, and put the money into insulation.
Plenty of south facing roof and a cylinder already: add solar thermal to whatever you have.

The way to settle it properly is a heat loss survey, not a comparison table. That is what tells you whether radiators need changing and what a heat pump would actually cost to run in your house rather than in a brochure.

Common questions

Are gas boilers being banned in the UK? Not in existing homes. The Future Homes Standard from 24 March 2027 applies to new build. Replacement gas boilers stay legal.

What is the cheapest alternative to a gas boiler? Cheapest to buy is a condensing gas boiler. Cheapest to run, in the right home on the right tariff, is a heat pump.

Can I replace a combi boiler with a heat pump? Yes, but you will need space for a hot water cylinder and probably some larger radiators. Both are costed at the survey.

Do heat pumps work in old houses? Heat loss decides it, not age. Insulated Victorian houses run on heat pumps perfectly well.

Is there a grant? £7,500 for a heat pump, £9,000 for oil and LPG homes on installs completing between 21 July 2026 and March 2027. Nothing for a gas boiler swap.

Get the two numbers side by side

Most people asking this question want one thing: to know what each option would actually cost them, in their house, this year. That is a survey, and ours is free.

We will assess the property properly, tell you whether a heat pump genuinely suits it, and quote the heat pump price with the £7,500 already deducted alongside the gas boiler price, so you are comparing net figures rather than headline ones. If a boiler is the better fit for your home, we will tell you that and quote it, which is not always what you get from a company that only sells one of the two.

Book a free heat pump survey or get a new boiler quote. Call us on 0800 980 6018, or see what we charge before you speak to anyone.

Grant figures and the Future Homes Standard date checked 7 September 2026. Government schemes change, so we reconfirm the live grant amount before any quote.