We are looking forward to generating some of our electricity - and the 'Feed-in-Tariff' -the money we get paid by The Government to generate our own electricity- is a good incentive.
We changed our mind on the Air Source Heat Pump - from various sources we had reports that a lot of UK installations don't work, and the figures quoted by the various manufacturers don't really add up. The issue was that currently we use mains Gas for space heating, which is approx. 1/3 of the cost of electricity. The Air Source Heat Pump needs to run on electricity and has an Energy Coefficient of 1:3.5 . In itself 1:3.5 is great - but if our space heating by Gas has to be replaced by electricity we see no real gains. Yet.
Therefore we'll look at this technology again in a year or so.