Disclaimer

Last updated 5 November 2026.

Rates, tariffs, grants and prices change — sometimes quarterly. Every figure on KiloWise carries its date and source; a figure without a date is a defect, not a feature. Do not spend money on the strength of a figure here without checking the official source first.

No saving on this site is guaranteed. A saving estimate is a planning figure based on the assumptions shown next to it. Your home, climate, habits and tariff will change the result.

Do not attempt electrical, gas, or structural work on the basis of a guide here. Use a qualified professional, and follow your country's safety guidance.