Because You now not really need to use central heating and cooling units at all times, your energy bills will go down, along with the energy efficiency of your property will routinely increase. For more information and to check eligibility, check out the UK Government Web-site. Social Housing Decarbonisation Fund: https://freeecogrants.co.uk/tips-to-design-the-insulation-for-your-home-with-free-eco-grant/