London Cleaner Heat Cashback

Up to 40% cashback for your commercial boiler installation[1]

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What is the London Cleaner Heat Cashback?

The Cleaner Heat Cashback is Mayor Sadiq Khan's scheme for businesses in Greater London who replace older working boilers with a new, cleaner heating system. It's designed to help businesses save money on their energy bills and improve London's air quality. As part of the scheme, your business can get up to 40% cashback [1] on a new boiler with an approved installer like British Gas. The cashback scheme will operate on a first-come, first-serve basis. The scheme will close for new applications once the funding has been allocated, or by 31 March 2020.


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Learn more about the London Cleaner Heat Cashback

Up to 40% cashback on a new boiler[1]

Is my business eligible for the London Cleaner Heat Cashback scheme?

To be eligible for the London Cleaner Heat Cashback and receive your commercial boiler replacement your business must be:

  • Based in London
  • A small or medium-sized enterprise
  • The building owner, or a tenant with responsibility for maintenance
  • Replacing an old, working boiler, that's at least ten years old
  • Your new boiler needs to be at least 90 per cent energy efficient and have NOx emissions of 40mg/kWh or less

Your installation must be completed by an accredited, manufacturer-approved installer.

British Gas engineer surveying

How do I get the cashback?

Eligible businesses will need to apply directly using an online application form.

You'll need:

  • Details of your business and current heating system
  • Copies of your gas bills for the past 12 months
  • A quote from a manufacturer-approved installer

What happens after you apply?

  • Your application will be checked by Energy Saving Trust and Kiwa to make sure your business is eligible
  • If your business is successful, you'll be sent a cashback voucher
  • You can go ahead and arrange the installation
  • You must pay your installer in full before you can claim the cashback
  • Your payment will be sent from the Energy Saving Trust to your bank account or by cheque

Why choose us for your new commercial boiler installation?

Our local Gas Safe registered engineers install and replace commercial boilers in London and Greater London.

Free survey

Free, no-obligation site visit and quote by an experienced Commercial Boiler Advisor to find the right boiler for you

Spread the cost

Spread the cost by paying for your boiler upfront or over two years with no interest to pay [2]

3 year service & maintenance plan

We'll help keep your new commercial boiler safe and reliable [3]

* We may record calls to help improve our service to you. Calls to 0800 numbers are free from mobiles and landlines. Calls to 0330 / 0333 numbers will cost you no more than 01 or 02 numbers from landlines and mobiles and may be included with your call package if you get 'inclusive minutes'. Text messages are charged at your standard message rate and may be included in your call package.

All offers are subject to eligibility and may change at any time.

[1] The Mayor of London's Cleaner Heat Cashback scheme only applies to small and medium-sized businesses in commercial properties in Greater London that have fewer than 250 employees and have an annual turnover of no more than £50m. Your current heating system must be working and have a minimum size of 70 kW. In addition, the current boiler must be +10 years old and use gas, oil or LPG; or it must use coal or biomass and be of any age. You can receive 30% cashback when you install a new gas or LPG boiler. Or you can receive 35% cashback when you install a renewable heating system or connect to a local heat network. If your business is located in one of London’s Air Quality Focus Areas, you’ll be able to claim an additional 5% cashback. The cashback scheme will operate on a first-come, first-serve basis. The scheme will close for new applications once the funding has been allocated or by 31 March 2020.

Further conditions see

This offer is subject to availability and may change at any time.

[2] Business Finance: The 0% finance offer is valid on a 2 year hire purchase agreement only and is only available on gas appliances with a total system output <150kW. The offer and the availability of finance is subject to business type, status and a credit check. You cannot use the offer with any other British Gas offer. We reserve the right to change, amend or remove this offer without prior notice. British Gas acts as a credit broker (not a finance provider) and may receive a commission for the introduction. Finance will be provided by Macquarie Corporate and Asset Finance. Macquarie Corporate and Asset Finance is the trading name of Macquarie Corporate And Asset Finance 1 Limited (Registered in England No. 07815862) which is authorised and regulated by the Financial Conduct Authority and Macquarie Corporate and Asset Finance 2 Limited (Registered in England No. 08253764). British Gas is the trading name of British Gas New Heating Limited (Registered in England No. 06723244), an appointed representative of British Gas Services Limited (Registered in England No. 03141243) which is authorised and regulated by the Financial Conduct Authority. Both companies registered office: Millstream, Maidenhead Road, Windsor, Berkshire SL4 5GD Full terms and conditions can be found here.

[3] 3 Year service and maintenance: Your installation includes a 3 Year Business Care Essential (Installations) service and maintenance plan from British Gas. This agreement only applies to the parts and appliance that we install during the installation work. We will also complete an annual service on your appliance in years 2 and 3 of the 3 Year service and maintenance plan. A service is not required in the first year after installation.

Read our Commercial Installation terms and conditions (pdf 343KB) here. For Commercial Installations after 25 September please read our Supplementary information (pdf 488KB) for our Commercial Installations and for the Business Care Essential (Installation Plan) as this will change your terms and conditions.