ECO3 which is the government's response to the Energy Company Obligation will run from Autumn 2018 until March 2022 and delivers energy efficiency and heating measures to homes in Great Britain.

The ECO3 funding scheme is to allow certain heating system upgrades when they are delivered alongside certain insulation measures. Basically, this means that you could receive ECO funding to upgrade your current heating system which would otherwise be ineligible as long as a further insulation measure is also installed.

Make energy improvements to your home

Licence Number: 13557

Licence Number: 400721



Getting work done during coronavirus


Installers can continue to work in people’s homes during the national lockdown. You can still apply for a grant and get the work done. Your installer must follow the COVID-19 Secure guidelines.


How much you can get

Vouchers will cover two-thirds of the cost of eligible improvements, up to a maximum government contribution of £5,000.


If you, or someone in your household, receive certain benefits you may be eligible for a voucher covering 100% of the cost of the improvements. The maximum value of the voucher is £10,000. Check if you’re eligible for the low-income support scheme.


Landlords are not eligible for low-income support.



You may be eligible if you live in England and:


  • You own your own home (including long-leaseholders and shared ownership)

  • You own your own park home on a residential site (including Gypsy and Traveller sites)

  • You’re a residential landlord in the private or social rented sector (including local authorities and housing associations)

Check if you’re eligible for a Grant...


  • If you’re claiming other grants or funding

  • Energy Company Obligation (ECO)


Local Authority Delivery Scheme

You cannot apply for the scheme if:-

  • You have already received a grant from your local authority as part of the Local Authority Delivery Scheme.

  • If you’re a landlord


Energy efficiency standard

Most private rented properties must have a minimum Energy Performance Certificate (EPC) rating of E under the minimum energy efficiency standard.


If you’re applying for a voucher for a private rented sector property, you need to either provide:


  • Proof that you have met this standard

  • Proof of an exemption

  • If you’re a tenant

  • Although you cannot apply for vouchers, you can use the Simple Energy Advice (SEA) website to check what energy efficiency or low carbon heating improvements may be best suited for your home. You can take the questionnaire and build an energy efficiency plan to send to your landlord.


What the voucher can be used for

We recommend that you seek advice on how best to improve the energy efficiency and heating in your home.


You can use the Simple Energy Advice (SEA) website to check what energy efficiency or low carbon heating improvements may be best suited to your home.


You can also seek advice from your property’s Energy Performance Certificate (EPC) or from a retrofit assessor. You cannot claim for the cost of any advice as part of your grant.


Home improvements

The available measures are split into ‘primary’ and ‘secondary’ measures.


Primary measures

The voucher must be used to install at least 1 primary measure.



The following insulation measures are covered by the voucher:


  • Solid wall insulation (internal or external)

  • Cavity wall insulation

  • Under-floor insulation (solid floor, suspended floor)

  • Loft insulation

  • Flat roof insulation

  • Pitched roof insulation

  • Room in roof insulation

  • Insulating a park home

Check the additional requirements around insulation measures (ODT, 8.51KB).


Low carbon heat

The following low carbon heating measures are covered by the voucher:


  • air source heat pump

  • ground source heat pump

  • solar thermal (liquid-filled flat plate or evacuated tube collector)

  • biomass boiler

  • hybrid heat pump

Check the additional requirements around low carbon heat measures (ODT, 8.61KB).


Secondary measures

If you install at least 1 primary measure, your voucher can be used to help cover the cost of any of the following secondary measures.


The amount you get towards the cost of secondary measures cannot exceed the amount you get for primary measures.


You will only be able to redeem vouchers for secondary measures once you have installed a primary measure and redeemed the vouchers for that measure.


Windows and Doors

The following measures are covered by the voucher:


Draught Proofing

  • Double or triple glazing (where replacing single glazing)

  • Secondary glazing (in addition to single glazing)

  • Energy-efficient replacement doors (replacing single glazed or solid doors installed before 2002)

  • Heating controls and insulation

The following measures are covered by the voucher:


  • Hot water tank thermostat

  • Hot water tank insulation

  • Heating controls (such as appliance thermostats, smart heating controls, zone controls, intelligent delayed start thermostat, thermostatic radiator valves)

  • What the voucher covers

Costs that are covered by the voucher include:


  • Labor

  • Materials

  • VAT

Additional works will be covered by the voucher if they are necessary for the installation of measures. Find out what the voucher covers (ODT, 12.7KB).


Work cannot be completed by yourself, a member of your household, or your immediate family.


All work covered by the voucher must be completed by a TrustMark-registered installer who is also registered for the scheme. Your installer will also need to meet PAS and MCS standards when installing your measures.


How to apply:

Check your eligibility


  • Check what energy efficiency or low carbon heat improvements may be suitable for your home


  • Find certified installers in your area that are able to carry out the work


  • Apply for the voucher


Getting the voucher

You will receive a separate voucher for each of the measures that you have applied to install.


Each voucher is only valid for the measure and property you have applied for. The voucher is only for use by the named applicant and cannot be transferred to another person.


You can only begin work once your voucher has been issued. Any work that was started before that date cannot be claimed.


Vouchers will be valid for 3 months from the date they are issued or until 31 March 2022 (whichever is earlier). Vouchers must be redeemed before the validity period ends. You can request a voucher extension at any time before your voucher has expired unless the scheme has been closed.


Getting the work done

Once your voucher has been issued, the installer can begin the work.


Your installer may ask you for a deposit. This should not be larger than the amount they would normally charge. It cannot be larger than your expected contribution to the cost of measures under the quote they have provided you.


If you’re applying under the low-income scheme, your installer can only ask you for a deposit when the total cost of the work exceeds the £10,000 grant. In this case, only the excess amount will be eligible for a deposit.


After the work is done

Once the work is completed, your installer must give you:


  • A dated copy of an invoice showing the supply and installation cost of your chosen measures. You must have 1 invoice per measure

  • Any certification for energy efficiency improvement measures

  • A guarantee document from the installer

  • An MCS certificate and relevant manufacturer instructions (if you have installed a low carbon heating measure)

  • A Biomass Suppliers List (if your measure is a biomass-fuelled low carbon heating system)

  • Redeeming the voucher

You must redeem your voucher before it expires.


To redeem your voucher you will need:


  • Your reference number (received when you first applied for the grant)

  • The postcode of the property where the measure has been installed

  • The email address that you used to make your application

  • your voucher number

  • The final cost of the measure (including VAT, as applicable)

  • A digital copy of your dated invoice. You will need 1 invoice per measure

You will need to confirm that:


  • The installation was completed satisfactorily

  • You have received the necessary certification documents from the installer

  • You have paid your share of the costs to the installer (if applicable)

When you redeem your voucher the grant will be paid on your behalf directly to the installer.

Redeem Your Voucher Here

The ECO Obligation Explained

The Energy Company Obligation (ECO) is a government energy efficiency scheme in Great Britain to help reduce carbon emissions and tackle fuel poverty.


ECO is a Government programme where major Energy Companies are required to fund domestic energy saving measures.


Each firm is set a legally binding target to reduce CO2 and cut customer fuel bills throughout Great Britain.


The last phase of ECO2T ran for 18 months from April 1st 2017 – 31st September 2018.


The Department for Business, Energy and Industrial Strategy (BEIS) has consulted on a new ECO scheme (ECO3) which started after 1 October 2018, to run until 31 March 2022.

Energy Efficiency Services

Working with our partners  we are able to offer energy efficiency services that include:

  • Energy Performance Certificates (EPC)

  • Energy assessments including Green Deal Assessments

  • Access to energy-efficiency improvement grants and finances

  • High quality energy -efficiency upgrades and installation

  • We have a network of expert Advisors, Domestic Energy Assessors and Technical Surveyors throughout the UK

USEFUL LINKS: To check if you are eligible click the Icon below