The emphasis on solar heating and photo voltaics might be appropriate on the south coast but is over done for Warwickshire because there is reduced solar radiation due to our latitude and substantially more cloudy skys. It isnt true that photo voltaics are nearly as effective on a cloudy day as on a sunny day. Data shows (for herefordshire) that the total solar radiation on a cloudy day in winter is about one tenth of that on a sunny day in summer.

Supports the use of log burning stoves when the logs have been produced sustainably (e.g waste wood). This has a good chance of providing 10% of energy sustainably.


There is no mention of house ventilation. There is a limit to how well a house can be insulated because houses must be ventilated to control moisture levels and maintain a supply of fresh air. Using heat exchanged ventilation the heat from waste air leaving a building can be transferred to fresh air entering it so little or no additional energy is required to heat the incoming air to maintain room temperature. This can also be used when it is hotter outside than in to keep the inside cooler.

The requirement for a given percentage of sustainable energy is pointless and unhelpful. Reduction in fossil fuel usage is required and if this can be acheived by energy conservation techniques alone that should be good enough. Instead houses should only be able to consume a predetermined quantity of energy from fossil fuels each year.

Systems for night time venting can help with building temperature management to as temperatures rise.