According to the Department of Energy & Climate Change, by the end of November 2014 the Energy Company Obligation (ECO) and Green Deal package had delivered new boilers, windows and insulation to 1,021,000 homes.
A substantial part of work under ECO helped people with homes at risk of fuel poverty.
Energy and climate change minister Amber Rudd said: “More than one million homes across the country - including over 28,000 homes in rural areas - are enjoying a warmer, cheaper and greener winter thanks to our policies.
“I want to see energy companies continue to deliver their obligations so more people can reap the benefits and stay warm this winter and every winter.”
The figures were revealed in a statistical report on the government’s home energy efficiency programmes, covering the period up to the end of November.
At the end of 2014, the government had allocated up to £24m worth of funding to households in England and Wales through the second release of the Green Deal Home Improvement Fund.
Details of further funding releases will be announced on a quarterly basis, with the next release expected in February.
Funding is part of the additional £100m for household energy-efficiency measures announced in October 2014, which is in addition to the £450m already allocated to household energy efficiency between 2014 and 2017.