can anyone recommend the cheapest 7day controller with boost? Screwfix have
>the CENTAURPLUS C27 for £24.99
I have just bought a CentaurPlus C27. Whilst very happy with it for my purposes which are far simpler than its facilities, it does not have heating boost. It has hot water boost (but not advance) and heating advance (but not boost). This may be a problem for your friend.
Christian.