Should I replace my gas boiler with a heat pump?

If your home is reasonably insulated, you have room for a cylinder and an outdoor unit, and you plan to stay a few years, a heat pump with the £7,500 grant usually makes sense. If the house leaks heat, has tiny radiators or you’re moving soon, a new boiler is the better buy for now. The survey gives you the honest answer.

How much does it cost to replace a boiler with a heat pump?

From £2,500 after the £7,500 grant for a typical three bed home, including the cylinder, controls and removing the old boiler, with zero VAT on the installation. Compare that with a new boiler from £2,000 fitted. Both are quoted as fixed prices after the survey.

Will I need new radiators?

Often some, not all. Heat pumps run at lower water temperatures, so radiators that were marginal with a boiler may need upsizing. The survey measures every one and tells you exactly which, if any.

What happens to my combi boiler and hot water?

The combi is removed, which the grant requires, and a hot water cylinder is fitted, usually in an airing cupboard, loft or utility. You’ll have stored hot water rather than on demand, and we size the cylinder so it doesn’t run out.

Are heat pumps cheaper to run than gas?

Usually, yes, when the system is designed properly and you’re on a suitable electricity tariff. A well set up heat pump produces three to four units of heat for every unit of electricity. We include a running cost estimate with the quote so you can see it for your home.

Can you do it if I’m off the gas grid, on oil or LPG?

Yes, and those homes currently qualify for a £9,000 grant rather than £7,500. The oil tank or LPG supply is decommissioned as part of the job.

Replacing Your Boiler with a Heat Pump

Boiler due for replacement and wondering whether to go heat pump instead?
Not sure if your radiators, insulation or hot water setup will cope?
Want a straight answer from someone who fits both?

I'm a Local Gas Engineer, I Fit Both, So I'll Tell You Which Is Right

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Gas Safe Registered

Trusted & Accredited

Blackthorne Plumbing is a Gas Safe registered heating engineer based in Walsall and an MCS certified heat pump installer, serving the West Midlands. If you are replacing your boiler, we give you guide prices for both options on a typical three bed home: a new gas boiler from £2,000 fitted, usually the next day, or an air source heat pump from £2,500 after the £7,500 Boiler Upgrade Scheme grant, fitted in two to four days. Both get a fixed price after a free survey.

Boiler or Heat Pump? Prices Side by Side

Guide prices for a typical three bed home, so you can compare like for like. Fixed price after the free survey.

Stay on Gas

New Gas Boiler

From £2,000 fitted

Combi boiler fitted next day, up to 10 year warranty. Lowest upfront cost, keeps you on gas prices.

Book a Free Survey

Switch

Air Source Heat Pump

From £2,500 after grant

Heat pump, cylinder and controls, old boiler removed, MCS certified. Lower running costs, off gas for good.

Book a Free Survey

Best Fit

Heat Pump + Radiator Upgrade

From £2,500 after grant

Heat pump with the radiators upsized where the survey shows they’re needed, so the house is warm at low water temperatures.

Book a Free Survey

Zero VAT applies to the heat pump installation. The grant is taken off the quote as an upfront discount, and we apply for it on your behalf.

3 Steps to the Right Decision

Survey first, then the numbers, then you choose

Free Survey
of Your Home

An MCS certified heat pump engineer who is also a Gas Safe boiler engineer checks the insulation, measures the radiators, finds a spot for the cylinder and the outdoor unit, and runs the heat loss calculation.

Both Prices,
Written Down

You get a fixed price for a new boiler and a fixed price for a heat pump with the grant deducted, plus an estimate of running costs for each, so the choice is made on numbers, not a sales pitch.

We Fit Whichever
You Choose

A boiler next day, or a heat pump in two to four days with the old boiler removed and the MCS certificate issued to release the grant. Same engineer either way.

Recent Boiler to Heat Pump Switches

Homes that have moved from gas to a heat pump, and some that were better off with a new boiler

Wolverhampton

Prefer to Talk?

Message or call and we'll talk through your home before anyone comes out. If a heat pump isn't right for you yet, we'll say so on the phone.

WhatsApp Us Now 07596848767

Trusted Across the West Midlands for Over a Decade

Don't just take our word for it. Read what our customers say about the honesty of our advice.

“Sharif replaced my faulty thermostats within hours of contacting them. They gave honest advice on products that suited my budget and fitted everything professionally. Would definitely use them again and recommend to others.”

Duane

September 30, 2025

Checkatrade

“Excellent service! He arrived very quickly and was very polite and professional. He clearly explained the issue and the work carried out, making everything easy to understand. The boiler was fixed efficiently, and I'm very happy with the service. Highly recommended.”

Frank Ogieva

January 22, 2026

Checkatrade & TrustATrader

“Sharif is an outstanding technician with a diverse skill set. He provided exceptional service, replacing all the pipes for the leaking sinks in both our bathroom and kitchen. He also conducted comprehensive tests to ensure everything was functioning efficiently. We highly recommend Sharif and his company for their professional and high-quality work.”

Kain

September 24, 2025

Checkatrade

“Fantastic work friendly faces and a brilliant job installing my boiler, will use then again in future”

Peter

December 22, 2025

Checkatrade

We Are a Local Small Business

We're MCS certified heat pump installers based in Walsall, installing across Walsall, Birmingham, Wolverhampton, Sutton Coldfield, Lichfield, Cannock, Tamworth, Stafford, Dudley, West Bromwich and across the West Midlands

Blackthorne PlumbingWalsall, West Midlands

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