In this answer
Short answer
Nest is the Welsh Government's Warm Homes scheme for Wales, and it does two things. First, it gives free, impartial energy advice to every household in Wales, whatever your income or tenure1. Second, for households that qualify, it pays for free home energy efficiency improvements, which can include insulation, a new boiler or central heating, solar panels and a heat pump3.
The scheme is aimed at people living on a lower income, and its purpose is to help households facing an immediate risk to their health and wellbeing because of a lack of essential heating or hot water5. If that describes your home, the entry point is a single freephone number, 0808 808 2244, open Monday to Friday from 9am to 6pm5.
About Nest and its operator
Nest is a Welsh Government scheme, run under the Warm Homes Nest programme, whose stated aim is to make Welsh homes warmer and more energy efficient places to live1. It sits alongside the other UK nations' fuel poverty schemes: Energy Saving Trust describes Nest, with Scotland's Warmer Homes Scotland, as a scheme providing additional targeted support to low income households8.
The advice side is open to everyone. The scheme's annual report states that the free and impartial service is available to all households in Wales2, and Bridgend County Borough Council confirms that all households in Wales have access to free, impartial advice to help reduce energy bills and maximise income7. The improvements side is targeted: only households that meet the eligibility rules get free work.
Nest publishes a customer charter for its home energy support scheme, which includes a commitment to "be open and avoid raising expectations that we are unable to meet"9. In practice that means the advice team will tell you plainly whether you qualify for free improvements before anything is arranged.
Support Nest offers: guidance, insulation, heating and heat pumps
For eligible households, Nest funds a package of home energy efficiency improvements. The Welsh Government's own list of what the scheme can provide includes a heat pump, insulation and solar panels3, and Which? describes the scheme as providing insulation, solar panels and heat pumps10. Where a heating system is unsafe or unreliable, the Welsh Government says the scheme can fund the replacement of a boiler or electric storage heaters to ensure you have a safe and reliable heating system5.
StepChange summarises the offer as free, impartial advice and, in some cases, free home energy efficiency improvements such as a new boiler, central heating and insulation11. Not every measure is covered: a 2015 consultation summary recording Care & Repair survey findings noted that the scheme did not cover replacement windows or the replacement of old, inefficient boilers at that time12, so what is offered depends on the assessment of your home.

For a household's energy independence, the significance is that these measures are fully funded rather than loaned: Citizens Advice has called for the scheme to provide trusted advice and fully funded energy efficiency upgrades for low income households in Wales13. The work is also delivered locally: the scheme's 2022-23 annual report records 100% of installations completed by Wales-based installers14.
Who qualifies: income, benefits, health and housing status

Nest's eligibility rules combine three things: your tenure, your income, and your home's energy performance. A House of Commons research briefing sets out the conditions: you must own or privately rent your home, receive a means tested benefit or live in a low income household, and live in a home with an EPC rating of 54 (E) or less, or 68 (D) or less where a household member has an eligible health condition15.
The eligible health conditions are defined on the scheme's own eligibility page4:
- respiratory disease, including respiratory infections, broncho-constriction in asthma, and chronic obstructive pulmonary disease
- circulatory disease, including cardio-vascular disease, strokes and heart attacks
- mental health conditions, including depression, anxiety, psychosis and bipolar disorders
- dementia
- intellectual and development disorders
Social renters are not covered by the improvements side of the scheme: the rules cover owner-occupiers and private renters only15. Private renters also need their landlord's agreement, covered below. If you are not eligible, the scheme states it can help you find other schemes that suit your circumstances6.
EPC bands: the 54 (E) and 68 (D) limits and reserve list
The energy performance test is central to eligibility. Your home must have an EPC rating of 54 (E) or less; or 68 (D) or less if someone in your household has an eligible health condition4. Band D runs from 55 to 68 on the standard EPC scale, so the 68 cut-off includes every D-rated home16.
If your home has an EPC rating of 68 (D) or less but no one in your household has an eligible condition, your details will be placed on a reserve list4. That means a D-rated home on a low income without a health condition is not refused outright, but it is not guaranteed work either.
One practical point: not every Welsh home has a certificate. ONS analysis shows EPCs cover around 55% of the housing stock in Wales, based on Census 2021 analysis17. If your home has never been assessed, that is something to raise when you call, and a home energy assessment is how a rating is established in the first place.
Applying and the assessment process explained
The route in is a phone call. The Welsh Government's guidance says to check if you are eligible for help by calling Nest free on 0808 808 2244, or you can request a callback from an advisor5. Isle of Anglesey County Council adds that you can visit the Nest website at nest.gov.wales18.
Citizens Advice describes what follows: Nest will check your eligibility for the scheme, ask to see some evidence, for example a letter confirming your benefit entitlement, and then arrange for an assessor to visit your home19. The evidence you may be asked for includes:
- a benefit award letter or Council Tax statement, as evidence of a means tested benefit4
- for owner-occupiers, one of: a mortgage statement, a buildings insurance policy, or the property deeds4
- for private renters, your landlord's details, so Nest can request permission for any work4

On landlords, the scheme's 2022-23 annual report states that Nest works in partnership with Rent Smart Wales to ensure all private landlords are officially registered before being allowed access to support14.
How to reach Nest: telephone, opening hours, Welsh and email

The freephone number is 0808 808 2244, confirmed by the Welsh Government, National Energy Action and Which?5. Opening hours are Monday to Friday from 9am to 6pm, excluding bank holidays5.
Calls and emails are welcomed in Welsh: the Welsh Government's guidance states this in both languages5. For people who are hard of hearing, neurodivergent, or who have difficulties communicating by telephone, Nest says you are welcome to contact the service by email at advicewales@est.org.uk22.
If you do not think you are eligible, or are not sure, you can still contact Nest for energy efficiency advice, help with other grants, energy tariffs and benefits entitlement checks22. The fuel poverty charity National Energy Action also directs households to call Nest on 0808 808 2244 for help20.
Nest's place among UK energy schemes
Each UK nation has its own entry point for this kind of help, and Wales's is Nest. England's equivalent route is the GOV.UK Find Ways to Save Energy tool; Scotland has Home Energy Scotland; Northern Ireland has the NI Energy Advice line and the Northern Ireland Sustainable Energy Programme, whose eligibility similarly depends on your income, housing tenure and where you live24. Our overview of free home energy advice in Wales covers the other advice channels alongside Nest.
For a household thinking about a longer route to energy independence, Nest is one funding source among several, and it is worth checking what grant help you can get before you start work. Nest's own advice line can point you to other schemes if you do not qualify6, and the broader question of where to start energy improvements and what order to do them in applies to funded work just as much as work you pay for yourself. The starting point for everything in Wales is the same: one free phone call.
Sources24 sources
- Get help with energy efficiency in your home: Nest, Welsh Government
- Warm Homes Nest Scheme annual report 2024-2025, Welsh Government
- Get free home energy efficiency improvements through Nest, Welsh Government
- Nest eligibility, Welsh Government
- Get help with unexpected costs such as food and heating, Welsh Government
- Nest Warm Homes Programme, Welsh Government
- Home energy efficiency, Bridgend County Borough Council
- Supporting households with low carbon technology combinations, Energy Saving Trust
- Nest home energy support scheme customer charter, Welsh Government
- Insulation grants, Which?
- Grants and funding for energy bills, StepChange
- Summary of responses: Warm Homes consultation, Welsh Government, 2016
- Delivering warmer homes for private renters in Wales, Citizens Advice
- Warm Homes Nest Scheme annual report 2022-2023, Welsh Government
- Fuel poverty support: CBP-9585, House of Commons Library
- Energy efficiency of housing in England and Wales, Office for National Statistics, 2025
- Energy performance of buildings certificates statistical release April to June 2025, Department for Energy Security and Net Zero, 2025
- Nest: a scheme to make your home warmer and more energy efficient, Isle of Anglesey County Council
- Get help with the cost of energy efficiency, Citizens Advice
- Struggling with energy bills, National Energy Action
- Green Homes Wales, Development Bank of Wales
- Apply for Nest, Welsh Government
- Cold Weather Payment, nidirect
- Northern Ireland Sustainable Energy Programme, Energy Saving Trust