On the subject of green savings I though it was about time to clean the filters on our heat recovery system and to stop thinking about mismanagement. We have fitted these systems to our last three homes and other than a bit of crawling about in lofts with ducting they are quite easy to do. Basically the 'stale' air is drawn from the kitchen and bathrooms and fresh air blown into the other rooms. The clever bit is that the stale air is passed through a heat exchanger and this warms the air coming back in. In theory this can recover 80% or more of the heat, the house stays fresh and no open windows let the precious heat escape. Running costs are very low as the fans are super efficient and in most unit the heat exchanger is passive and uses no power.
It would take a long time to recover the cost of installation but the air quality is worth buying.
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