Some say you should allow 3kW.Is 2000 watts enough for the hot water basic allowance or are there other factors that you have to allow for.
So doitall why does he fit them?
I saw you advice to be careful re gas. Are you saying that the 'rules' say that, if the boiler connection is 22mm, you have to have a 22mm pipe all the way back, at least to the previous junction or possibly to the meter, even if a 15mm pipe is capable of carrying the required flow of gas within the 1mb pressure drop?The question on the gas pipe is a odd one as the rule is about the size of the inlet of the boiler. Without a pack you have a boiler with a 15mm pipe. Buy one of the packs and you get a valve provided with a service valve that has 22mm on the inlet side so the pipe has to be that size.
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