Hot Air Savings
...the study from the Royal Institute of Chartered Surveyors shows that some of the measures, such as solar panels to heat water, would cost £5,000 to install but reduce average bills by only £24 a year and would take about 208 years to pay back.
The RICS data shows that putting in all eight measures, including insulation, condenser boilers and double glazing, would cost £23,547. This would knock only £486 off fuel bills and would take 48 years to recoup.
That's why the Castle is unadorned with turbines and solar panels, but has just had the oil fired heating boosted to give even more gallons of steaming hot water!