Boiler and insulation grants are part of the Energy Company Obligation (ECO); a government scheme funded by utility companies including the 'Big Six'.
These grants help low income households in England, Scotland and Wales (unfortunately this grant isn’t available in Northern Ireland, to access funding for insulation in Northern Ireland you need to contact NIDirect Government Services) to become more energy efficient and lower heating bills. Eligible households can apply for a grant to install a new A-rated boiler using a Registered Boiler Grant Installer.
The 'Big Six' utility companies, including Npower, EDF and British Gas, are obliged to provide funding so that those who need to can improve the efficiency of their homes. This includes grants for new boilers and also for insulation (there's more information about insulation grants here). As the funding is a grant, not a loan, it doesn’t need to be repaid and could cover a large part - if not all - of the cost of replacing your old boiler for a new one
For boiler grants as long as you receive a qualifying benefit AND you own your own home AND your boiler is over 5 years old you might be eligible for a boiler grant to replace your old boiler for a brand new one.
You must own your own home to apply for a boiler grant.
You must also be in receipt of one of the following benefits:
If you receive one of these qualifying benefits (excluding Child Benefit) you will be eligible regardless of household income, so no means-testing is required for applications.
Once you apply online for a grant you'll be contacted to check you meet all the necessary criteria. They'll check what benefits you receive and confirm your status (whether you own your home). You will also be asked for the make and model of your current boiler, and for insulation you'll be asked about existing insulation and possibly details about your EPC.
Check your eligibility and apply for a boiler grant (funding available mainly for people in North West of England through this provider)
Check your eligibility and apply for a boiler grant (funding is available throughout the UK but excluding Northern Ireland through this provider)
Other relevant information
Insulation Grants also available
There are also insulation grants available as part of the ECO3 scheme. You can check your eligibility and apply for an insulation grant (funding is available for loft, internal wall, cavity and room in roof throughout the UK but not in Northern Ireland). Note that for insulation grants in some circumstances you don't need to be a homeowner.