Hi ichigo179,
Thank you for your query.
HMRC cannot provide tax-planning advice.
You can find general guidance about energy saving for your home here:
Green Deal: energy saving for your home
There is also guidance on environmental taxes, reliefs, and schemes here:
Environmental taxes, reliefs and schemes for businesses
If you need to advice or additional information, you will need to contact a financial adviser, such as an accountant.
Thank you.