npower Health Through Warmth Scheme (England and Wales)
npower Health Through Warmth (HTW) scheme was set up in 2000, working together with National Energy Action (NEA), the national fuel poverty charity, and the NHS. HTW aims to improve levels of warmth, comfort and quality of life for vulnerable people who have cold-related illnesses and need help with the installation of heating and insulation measures or repairs to existing systems or appliances which they can’t afford themselves. HTW is available across England and Wales to vulnerable people who meet the eligibility criteria. You don't have to be or become an npower customer to receive help from HTW - the scheme can consider helping you as long as you have a long-term health condition, own the home and have low income/savings.
You may be able to find out more about local energy efficiency schemes from your local council.