Taking in part in the recent eco-open homes event which coincided with the nationwide Heritage Open Days proved again to be a worthwhile experience, with lots of interest in our ground source heat pump.
I must admit, opening our house up to strangers, is not something we really look forward to, but it’s a big incentive to tidy up and it is good to discuss the pro’s and con’s of energy efficiency measures with others; whether it’s about saving money and reducing energy bills or about saving the planet. There was some interest in the wind turbines, and in the way the house was built and designed re-using materials, maximising solar gain and minimising heat loss, but the heat pumps – both ground source and air source certainly seemed to be an area of growing interest. We installed our heat pump seven years ago as part of our new-build eco-house. It involved sinking 160 metres of pipe in two loops 1 metre down out into the field. The actual heat pump bit sits in the utility room, looks a bit like a fridge freezer and works like a fridge in reverse! It provides all the hot water and heating; underfloor downstairs and radiators upstairs. The questions most people asked apart from How does the heat pump work? Were – How efficient is it? Well, we know that for every one unit of electricity put in we get about 4 units out and that it performs well – but we can only go on our experience of running a heat pump to service a house built with high insulation values, so investing in insulation measures has to be a starting point for most homeowners. Another frequently asked question was, how noisy are heat pumps? I know some people have had noise issues with air-source heat pumps, but our ground source is fairly quiet running and no more intrusive than your average central heating boiler. There is obviously some debate about how green heat pumps actually are given that they still rely on carbon producing electricity to run on (even if they are using it more efficiently). One solution is to install PV solar panels to generate some of the electricity then they are a greener alternative to oil.
And heat pumps were given a further boost today when the Government published proposals for the long term support for householders who install renewable heating systems such as heat pumps, biomass boilers and solar thermal in their homes. The consultation which ends 7 December 2012, proposes that the Renewable Heat Incentive (RHI) for householders, would be managed by Ofgem, is aimed at any householder seeking to replace their current heating with renewable heating kit or householders who have installed any such technology since 15 July 2009, (shame we were before this!). The plan is that householders will get paid for the heat expected to be produced by their installed technology. The Government have also published consultations on expanding the RHI scheme to commercial, industrial and community customers and also on the Air to Water Heat Pumps and Energy from waste.
See http://www.decc.gov.uk/en/content/cms/news/pn12_106/pn12_106.aspx for further details