Just installed one of these kits to replace a broken programmer on the boiler. It's truly awesome. I can now send text messages to my heating system. The future is here etc.
£200 from British Gas (don't need to be a customer) or £159 for the DIY kit (option I went for). Reckon it'll pay for itself within a year or two. They're putting proper development into it too, with the kit being fairly future proof and the head of the project being very active on Twitter with regard to suggestions and improvements.
Highly recommended. Takes about 20 minutes to install.
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