A Surrey boarding school has been given a £670,000 interest free loan to help make it more environmentally friendly.
The Royal Alexandra and Albert School, in Reigate, is planning works that it says could cut costs by £160,000 a year and cut its carbon emissions by 40%.
Surrey County Council said it expects the work will pay for itself within four years.
The state-run school secured the funding from Salix - a government energy efficiency loan scheme.
The council said £249,136 would be spent upgrading light fittings, £128,059 on a boiler management system and other heating improvements and a further £291,341 for a second boiler management system for the boarding school.
Surrey's children and learning councillor Peter Martin said: "As we continue our drive to be a world class organisation, our aim is for Surrey to have the lowest carbon emissions of any council in the country.
"The Royal Alexandra and Albert put in a lot of effort to secure this money and we were more than happy to support the school as part of our commitment to tackling this issue."