Replace Your Boiler With a Heat Pump

Designed, installed and signed off by our own MCS engineers. The grant application? We do it, and it takes £9,000 off the bill if you're coming off oil, £7,500 for everything else. Most customers pay between £2,000 and £5,000 all-in*.

MCS Accredited Gas Safe Registered 4.7★ Trustpilot

What actually changes?

Less than you'd expect. A heat pump replaces your boiler, but the rest of your heating system stays largely the same. Here's what happens.

  • Radiators stay. Most existing radiators work fine. We check every one during the survey and only recommend changes where needed.
  • Hot water cylinder added. A combi boiler heats water on demand. A heat pump stores it in a cylinder. Practically, it works the same. You still get hot water when you turn the tap.
  • Outdoor unit installed. The heat pump sits outside, usually on the side or back of the house. It's about the size of a large suitcase.
  • No gas needed. Once the heat pump is in, you don't need a gas supply for heating. If you still cook with gas, you keep the connection. Otherwise, you can disconnect and save the standing charge.

This isn't a whole-house renovation. It's a boiler swap with a different technology.

What you'll save each year

The savings depend on what fuel you're replacing. Oil and LPG users see the biggest difference. Gas users still save, but the payback takes longer.

Replacing Current Cost Heat Pump Cost Annual Saving
Gas boiler £850/year £520/year £330/year
Oil boiler Best value
Qualifies for the higher £9,000 grant		 £1,600/year £550/year £1,050/year
LPG boiler Best value £1,800/year £560/year £1,240/year
Electric heating Best value £2,100/year £560/year £1,540/year
Based on a typical 3-bed home, UK energy prices (April 2026), COP of 3.2, and a properly commissioned system. Your figures will vary.

The process

Four steps from enquiry to a working heat pump. The whole thing typically takes 6-8 weeks, most of which is grant processing time.

1

Survey and heat loss

We visit your home, measure every room, check your insulation, and calculate exactly how much heat your property needs. Free, no obligation.

2

Design and quote

We design the system, select the right unit, check your radiators, and give you a fixed quote with the grant already deducted.

3

Grant application

We submit your BUS grant application to Ofgem. Approval takes 4-6 weeks. You don't need to do anything.

4

Installation

Once the grant is confirmed, we install your heat pump. Our own engineers do every install, typically over 2-5 days. Our team do every installation.

The grant: £7,500, or £9,000 if you're on oil

The Boiler Upgrade Scheme pays £7,500 towards your heat pump. Replacing an oil boiler? You get the higher £9,000 grant (introduced June 2026). The grant is paid directly to us, so you only ever pay the difference. There's no income test and no minimum EPC rating. If you own your home and you're replacing an existing heating system, you almost certainly qualify. See our cost guide for a full breakdown of prices.

£12,000
-£7,500 BUS grant
You pay £4,500
0% VAT

See what it would cost for your home

Takes 60 seconds. No commitment. No sales calls unless you want one.

Common questions

Do I need to change my radiators?
Not always. Heat pumps run at lower flow temperatures (35-45 degrees C vs 55-65 degrees C for a boiler), so some radiators may need upsizing to deliver the same heat output. We check every radiator during the survey. Many homes need no changes at all.
Can I keep my combi boiler setup?
Not quite. A combi boiler heats water on demand. A heat pump uses a hot water cylinder to store heated water. We include the cylinder with every installation. The practical difference is minimal. You still get hot water whenever you need it.
How long does installation take?
Installation typically takes 2-5 days depending on the property. This includes fitting the outdoor unit, installing the hot water cylinder, connecting pipework, and commissioning the system. We give you an exact timeline after the survey.
What about my gas supply?
You can keep it or have it disconnected. If you still use gas for cooking, keep the supply. If the heat pump replaces your only gas appliance, you can disconnect and save the standing charge (around £100/year).
Will it heat as well as my boiler?
Yes, when properly installed. A heat pump delivers the same warmth at a lower flow temperature. Your home reaches the same temperature. It just runs longer at a gentler output, rather than blasting heat in short bursts.

Find out what a heat pump would cost for your home

Enter your postcode for an instant estimate. Or call us to talk it through, no pressure.

Call 01202 022735