UK residents who own their own home or rent it from a private landlord could be eligible for a new energy-efficient boiler from the energy provider.
The scheme is available for households that receive certain state benefits, including state pension credit, and lower-income households that receive child tax credit.
Householders can phone in or submit their details via npower.com, and the energy provider will conduct a free home assessment and technical survey to find out if they are eligible for a free boiler.
The assessor will also advise if npower can assist with any other energy improvements, such as loft or cavity-wall insulation. The company will then handle the entire process, from application through to installation.
The Energy Saving Trust estimates that boilers account for around 55% of a home's annual energy bill. So, in addition to saving on purchase and installation, eligible households will benefit from cheaper bills, with an A-rated, high-efficiency condensing model and heating controls estimated to offer savings of up to £310 a year*.
The government's ECO scheme, launched at the beginning of 2013, set targets for Britain's major energy suppliers to help vulnerable customers to reduce their energy usage. It replaces previous policies such as the carbon emissions reduction target (CERT) and the community energy-saving programme (CESP).
David Titterton, director of green deal and obligations for npower, said: "We have been trialling free boiler installations in select areas of the UK and are now pleased to be able provide energy-efficient boilers for eligible households nationwide.
"Replacing an old boiler can help to keep homes warm and bills down, and summer is the ideal time to upgrade your system and get your home prepared for the colder months. Thousands of homes across Britain could benefit from the ECO scheme, so we're appealing to households that think they may be eligible to get in touch."
To find out more about this offer, call npower on 0800 980 3355 or visit npower.com/wecanhelpwiththat
* Upgrading from a G-rated boiler could save up to £310 on an average annual energy bill. (Energy Saving Trust)