But remember that the energy to build and power it must still come from somewhere!
The data we use to work out energy and water costs come from a range of reliable international sources to give an average figure. Figures are rounded up or down to the nearest whole number.
* Total amounts potentially saved do not include lighting in individual rooms, or use of secondary heating.
EcoFrenzy has researched the market and to the best of our knowledge, figures and data are accurate at the time of publication.
EcoFrenzy is not responsible for any inaccuracies and will not engage in correspondence, but will update facts and figures when necessary or appropriate.