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13th May, 2025

Heat Pumps For Flats: Essential Information

Heat Pumps For Flats: Essential Information

Key takeaways

  • Heat pumps can be installed in many flats and offer potential savings.
  • Installation costs and processes vary for different buildings
  • Knowing the pros, cons, and available grants helps make an informed choice.
  • Try a new boiler quote, finance available including 0% APR.

Heat pumps can be installed in flats, but there are some important factors to consider.

Heat pumps are becoming a popular choice for heating and cooling in many homes, including flats. Yes, it is possible to install a heat pump in a flat, giving residents access to energy-efficient heating and lower bills. However, there are important factors to consider, such as space, installation costs, and any grants that may be available.

Many people living in flats want ways to save money on energy and reduce their carbon footprint. Heat pumps offer both of these benefits, but the process of installing one in a flat can be different from houses. Understanding how heat pumps work for flats, and what to expect, will help you decide if this is the right option for your home.

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Can You Install A Heat Pump In A Flat?

Heat pumps can be installed in flats, but there are some important factors to consider. Many flats use either air source heat pumps (ASHPs) or air-to-water heat pumps to heat your home. These systems can provide both heating and cooling.

Space constraints are a key issue, especially for air-source heat pump units. Flats often have limited outdoor areas for the pump to be placed. Usually, ASHPs are easier to fit because they don’t need digging or extensive ground work.

Ground source heat pumps are less common in flats. They require underground pipes, so unless the building already has the needed infrastructure, installation can be difficult or impossible.

Sometimes, planning permission or approval from building management is required. Residents should check local rules and building regulations before starting. Shared buildings may have special restrictions.

Key considerations:

  • Outdoor space for the unit

  • Access for maintenance

  • Permission from building or council

  • Noise concerns for neighbours

Type

Common in Flats?

Outdoor Space Needed

Special Notes

Air Source (ASHP)

Yes

Small

Usually allowed, less work

Ground Source

Rare

Large

Needs existing pipes

Air-to-water

Yes

Small

Good for shared heating

It is very important to get advice from a heating engineer. They can check if a flat is suitable for a heat pump and explain any extra steps needed.

Costs And Savings Of Installing A Heat Pump In A Flat

The upfront cost to install a heat pump in a flat is usually between £7,000 and £12,000. Prices can go higher depending on the brand and complexity. British Gas and other companies often provide installation services, and there may be government grants to lower the final cost.

Brands like Mitsubishi, Daikin, and Vitocal 100 are commonly used for flats. These brands have a range of models, so households can choose one that fits their space and needs.

Example Cost Table:

Brand

Estimated Cost (with install)

Mitsubishi

£8,000–£12,000

Daikin

£8,500–£13,000

Vitocal 100

£7,500–£11,500

Running costs are based on usage and the flat’s insulation. Heat pumps are usually cheaper to run than old gas or oil boilers. Households might see savings on their energy bills, but how much depends on their previous heating system.

Key savings factors:

Heat pumps also need yearly maintenance but costs for upkeep are usually lower than for a standard boiler. Some installers, including British Gas, offer service plans to help manage these costs.

In summary, while the initial cost is high, a heat pump can lower energy bills and provide reliable heating for many years.

Heat Pump Grants For Flats And Apartments

There are several grants that can help flat and apartment owners with the cost of installing a heat pump. The most well-known grant is the Boiler Upgrade Scheme.

This scheme provides up to £7,500 towards the cost of an air source or ground source heat pump. Only one grant is allowed per property. To qualify, the property usually needs to replace a fossil fuel heating system, such as gas or oil.

Applicants must own the property, but flats and apartments are eligible if they meet the set standards. Permission from the freeholder is required if you do not own the whole building.

The heat pump and the installer must be certified under the Microgeneration Certification Scheme (MCS). This guarantees the installation meets government quality standards.

Some energy companies also offer grants through schemes like ECO4. The amount offered can vary.

Quick Reference Table

Grant Name

Amount Available

Key Requirements

Boiler Upgrade Scheme

£7,500

MCS certification, replace fossil fuel system

Energy Company Obligation (ECO4)

Varies

Often income-related, may apply to flats

Always check if your property type is included before applying. Each grant may have its own rules for flats and apartments.

Advantages Of Installing A Heat Pump In A Flat

Heat pumps are becoming a popular choice for heating systems in flats. They offer several clear benefits for both the resident and the environment.

Energy Efficiency:
Air source heat pumps can provide efficient heating and hot water even in smaller living spaces. They often use much less electricity than traditional systems, helping to reduce energy bills. In some cases, tenants could save between 30 and 50% on heating costs compared to night storage heaters.

Lower Carbon Emissions:
Heat pumps use renewable energy from the air or ground, leading to much lower carbon emissions than systems that run on fossil fuels. This makes them a good option for anyone looking for a more low-carbon heating solution.

Year-Round Comfort:
Some heat pumps can both heat and cool a home. This makes it easy to keep the flat comfortable in every season.

Compact Design and Installation:
Air source heat pumps need only a small outdoor space—often about one square metre. This is ideal for individuals living in flats where space is limited.

Supports Modern Home Features:
Heat pumps work well with underfloor heating systems. They also reliably supply hot water.

Benefit

Description

Energy Saving

Uses less electricity than old heaters

Lower Emissions

Reduces greenhouse gas output

Small Footprint

Fits flats with minimal outdoor space

Versatile Heating

Can heat and sometimes cool the home

Modern Compatibility

Works with underfloor heating, supplies hot water

Disadvantages Of Installing A Heat Pump In A Flat

Installing a heat pump in a flat is not always straightforward. One major issue is that residents often need permission from a freeholder or building management before any work starts. This can slow down or even stop the project.

Space is also a concern. Heat pumps and their components, such as an outdoor unit and a storage tank for hot water, require room that many flats simply do not have. These units can be bulky and difficult to fit into small living spaces.

Noise can be another drawback. While modern models are quieter, the outdoor unit may still disturb neighbours if space is tight. People living close to the unit are more likely to hear the sound.

Initial cost is high. The price of purchasing and installing a heat pump is much higher than for a standard boiler. Owners also need to budget for changes like bigger radiators or improved insulation.

Getting heating performance right is sometimes tricky. Heat pumps often supply lower-temperature heat than gas or oil boilers. Flats may need to upgrade radiators to get enough warmth during colder months.

Maintenance and warranty conditions can be more complicated for flats. Access for repairs might require special permissions, and some warranties could have restrictions if the system is shared by multiple residents.

There may also be issues with efficiency. Flats in buildings with poor insulation or older construction may not get the full benefits of a heat pump. This can lead to higher-than-expected energy use.

The Heat Pump Installation Process For Flats

Installing a heat pump in a flat is possible, but the process comes with specific steps and considerations. Most flats use an air source heat pump because they are easier to fit and do not require ground works.

The first step is an assessment. A qualified heat pump installer looks at the building, measures space, and checks if planning permissions are needed. Flats with shared walls or limited outdoor areas need special attention.

After assessment, the installer recommends a suitable heat pump model. They will talk about noise levels, where to put the unit, and how pipes will run inside and out. In blocks of flats, it may be necessary to get agreement from neighbours or the building manager.

Key Steps in the Installation Process

Step

What Happens

Site Visit

Installer surveys the flat and discusses options

Choosing a Heat Pump

Select the best heat pump model for the flat's needs

Checking Permissions

Confirm if landlord or managing agent approval is required

Preparing the Flat

Clear the space, and prepare for any inside or outside work

Installation

Installer fits the heat pump, connects pipework, and sets up controls

Testing and Handover

System is tested to ensure it works. Installer explains how to use it

A typical installation can take from a few days up to a week, depending on the flat and its layout. Professional installers also provide a demonstration, so residents know how to adjust the system and maintain it properly.

Is A Heat Pump The Right Choice For My Flat Or Apartment?

A heat pump can work well in a flat, but it is not always the best fit for everyone. There are several things to think about before installing one.

Space is important. Heat pumps—especially air source types—need enough outdoor and indoor space for the unit and pipes. Some flats have a balcony or access to an outside wall, while others may not.

Noise is another factor. Most modern heat pumps are quiet, but older models can be noisy. If you live in a block with strict noise rules, you should check the sound levels first.

Some flats may have planning or building rules that affect heat pump installation. It is best to check with your landlord or management company before making plans.

The following table can help decide if a heat pump might suit your flat:

Consideration

Suitability in Flats

Outdoor Space

Needed for unit

Planning Restrictions

May apply

Noise Level

Low in modern models

Energy Savings

Usually high

Upfront Cost

Can be significant

Listing some key pros and cons can also help:

Pros:

  • Lower energy bills

  • Lower emissions

  • Efficient in well-insulated buildings

Cons:

  • High upfront cost

  • May need permission

  • Space requirements

Each flat is different. Some are ideal for a heat pump, while others have too many restrictions. Looking at property type, building age, and heating needs will help make the right choice.

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Frequently Asked Questions

Can you have a heat pump in a flat?

Yes, it is possible to have a heat pump in a flat. Air source heat pumps are most common because they do not need as much space as ground source systems. Access to outdoor space for the unit is important. Some flats may need planning permission for installation, especially in larger buildings or in conservation areas.

What homes are not suitable for heat pumps?

Homes with very poor insulation or single glazing may not benefit much from a heat pump. Old buildings that lose heat quickly are often unsuitable unless they are upgraded. Flats without access to an outside wall or space for an external unit generally cannot use an air source heat pump.

Can you install a heat pump in a leasehold flat?

You may be able to install a heat pump in a leasehold flat, but you must get permission from the freeholder first. Some leases restrict changes to the building’s structure or appearance. If the heat pump needs outdoor units or changes that affect shared spaces, it is important to check building rules and local regulations.

What is the best form of heating for a flat?

The best heating type depends on the flat's insulation, size, and access to outdoor space. Electric heaters are easy to fit but can be expensive to run. Heat pumps offer good efficiency if installation is possible. Modern electric storage heaters and infrared panels are sometimes used when heat pumps are not suitable.

What is the cheapest way to heat a flat with electricity?

Off-peak electric storage heaters can be the cheapest option when used with an Economy 7 tariff. They store heat at night and release it during the day. Heat pumps also offer low running costs compared to traditional electric heating if the flat is well-insulated.

Are heat pumps expensive to run?

Heat pumps generally cost less to run than standard electric or gas heaters. They use electricity efficiently to move heat rather than generate it. If electricity prices are high and insulation is poor, running costs may increase. Regular servicing helps maintain efficiency.

What is the main disadvantage of a heat pump?

The biggest disadvantage is the upfront installation cost, which can be high. Not all buildings are suited to installation, especially older flats with limited space. Noise from the external unit and the need for regular maintenance are also possible drawbacks.

Stephen Day profile photo
Article by
Stephen Day

Co-founder

Gas Safe registered and FGAS certified engineer with over 20 years experience in the heating and cooling industry.