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We have received quotes for the following system boilers. Price-wise they are pretty similar but which one is best?: 1) Vaillant system boiler with 250L unvented hot water cylinder or 2) Worcester Greenstar 4000 system boiler, 24kW with 210L unvented cylinder Many thanks.

We are currently getting quotes to have our house rewired but at some point, we'd like to knock through between the kitchen and dining room to make it more open plan. First question - should we do the knock through before the rewire or will it not make much difference? Secondly - in order to...

We've recently moved house and inherited an old Kingfisher 2 boiler. It has suddenly started making a very loud intermittent roaring sound every time we run the hot water. Can anyone suggest what the problem might be, whether it's serious and roughly how much it would cost to fix? Any advice...