Heat pumps are becoming an increasingly important part of the UK's transition to lower-carbon heating.

But there is still plenty of confusion about them.

Are gas boilers being banned? Do heat pumps work in cold weather? Are they suitable for older buildings? Are they expensive to run? And what financial support is available?

This guide explains how heat pumps work, the main types available, how they compare with traditional boilers and what you should consider before deciding whether a heat pump is right for your property.

Are Gas Boilers Being Banned in the UK?

No. If you already have a gas boiler, the introduction of the Future Homes and Buildings Standards does not mean that you suddenly have to remove it.

The major change relates to new buildings.

The Future Homes and Buildings Standards come into force from 24 March 2027, with transitional arrangements. New homes built to the standards will need low-carbon heating and high levels of energy efficiency; traditional gas boilers will not meet the required performance standard.

For owners of existing properties, the more useful question is whether replacing an ageing fossil-fuel heating system with a heat pump makes technical and financial sense for the building.

What Is a Heat Pump and How Does It Work?

A heat pump doesn't create heat by burning fuel in the same way as a gas, oil or LPG boiler.

Instead, it takes heat from the surrounding environment and transfers it into your building.

An air source heat pump extracts heat from the outside air, while a ground source heat pump extracts heat from the ground.

The system uses electricity to operate the heat-pump cycle and increase the temperature of the captured heat so that it can be used for heating.

One of the major differences between a heat pump and a conventional boiler is that a heat pump can deliver several units of heat for each unit of electricity it consumes.

That doesn't automatically mean every building will have lower bills after installing one. Running costs depend on factors including the building's heat demand, system design, electricity tariff, controls, emitter sizing and how the system is operated.

What Are the Main Types of Heat Pump?

For most UK properties considering a wet central-heating system, two technologies are particularly relevant.

Air-to-water heat pumps take heat from the outside air and transfer it to water that circulates through the building's heating system. These are among the most common systems used as alternatives to traditional boilers.

Ground source heat pumps extract heat from the ground through buried pipework. They can be highly effective but generally require more space and more extensive installation work.

Air-to-air heat pumps are another option. These transfer heat directly into indoor air rather than supplying a traditional wet central-heating system.

The Boiler Upgrade Scheme currently supports eligible air-to-water, ground source and, in qualifying residential circumstances, air-to-air heat pumps.

Heat Pump vs Gas Boiler: What's the Difference?

A gas boiler burns gas to generate heat. A heat pump moves existing heat from outside the building to the inside.

That fundamental difference affects how the systems operate.

Heat pumps generally work most efficiently when providing steady heating at lower flow temperatures, rather than repeatedly producing very high-temperature heat for short periods.

This means the whole heating system matters.

Radiators, underfloor heating, insulation, heat loss, controls and system design can all influence how effectively a heat pump performs.

That's why choosing a heat pump shouldn't begin with simply asking:

“Which heat pump should I buy?”

A better starting point is:

“What does my building need to heat efficiently?”

Do Heat Pumps Work in Older Buildings?

They can.

An older building isn't automatically unsuitable for a heat pump, but it needs to be properly assessed.

Factors that may need consideration include the building's heat loss, existing radiators or other heat emitters, insulation, electrical supply, available external space and current heating system.

Some properties may benefit from improvements before or alongside a heat-pump installation.

The objective isn't simply to install a heat pump. It is to create a heating system that is correctly designed for the property.

Are Heat Pumps Cheaper to Run Than Gas Boilers?

There isn't one answer that applies to every property.

Heat pumps can be highly efficient, but efficiency and running cost are not the same thing.

Your actual heating costs can depend on:

• the efficiency of the heat pump;

• your electricity tariff;

• the building's heat loss;

• the temperature at which the system operates;

• radiator or underfloor-heating design;

• heating controls; and

• how the building is used.

This is why projected running costs should ideally be considered as part of the technical assessment rather than relying on a generic savings figure.

What Heat Pump Grants Are Available in 2026?

For eligible properties in England and Wales, the Boiler Upgrade Scheme (BUS) can significantly reduce the upfront cost of installing a heat pump.

Current grant levels include £7,500 towards eligible air-to-water and ground source heat pumps and £2,500 towards eligible air-to-air heat pumps.

Eligible off-gas-grid properties replacing oil or LPG heating with an air-to-water or ground source heat pump can currently receive £9,000, with that uplift available until 31 March 2027.

The scheme is not restricted to ordinary homeowners. Eligible properties can include buildings used for businesses, although eligibility requirements apply.

Internal link opportunity: link this paragraph to your Blog 3 article, “Boiler Upgrade Scheme 2026: Heat Pump Grants for Homes, Businesses and Community Buildings.”

Are Heat Pumps Suitable for Businesses and Community Buildings?

Potentially, yes.

Heat pumps can be considered for homes as well as many non-domestic buildings, but larger or more complex buildings may require more detailed assessment.

For a church, village hall, community centre, charity premises or small business, considerations can include how frequently the building is occupied, existing heating arrangements, heat loss, electrical capacity and the way different areas of the building are used.

Funding eligibility and technical suitability should therefore be checked before committing to an installation.

The Boiler Upgrade Scheme itself can support eligible residential and non-residential properties in England and Wales.

Is a Heat Pump Right for Your Property?

A heat pump can be an excellent heating solution, but it isn't something that should be chosen on the basis of headlines alone.

Before committing to an installation, consider:

Is the building suitable?

What is its actual heat demand?

Will radiators or other parts of the heating system need changing?

Does the electrical supply need attention?

What will the system cost to operate?

Is grant funding available?

Getting those questions answered early can prevent expensive surprises later.

Check Whether Your Building Is Heat Pump Ready

If you're considering replacing a gas, oil or LPG heating system, you don't need to start by choosing an installer or buying equipment.

Start by understanding the building.

The Implementation Lab helps homeowners, businesses and community organisations understand their options, identify potential funding and work through the steps needed to move an energy-upgrade project forward.

If you're unsure whether a heat pump is suitable for your property or what funding may be available, book a free 15-minute review.

Book your free 15-minute review with The Implementation Lab.

Email: support@theimplementationlab.co.uk
Website: The Implementation Lab

Sources & Further Reading

GOV.UK — Boiler Upgrade Scheme
Official information on heat-pump grants, eligibility and current funding.
Boiler Upgrade Scheme – GOV.UK

Ofgem — Boiler Upgrade Scheme for Property Owners
Official guidance on eligible heat-pump technologies and current grant levels.
BUS for Property Owners – Ofgem

GOV.UK — Future Homes and Buildings Standards
Official information on the new standards for new homes and non-domestic buildings.
Future Homes and Buildings Standards – GOV.UK