I am renovating a house (3 bedroom Victorian semi) and am looking to have my existing boiler replaced. The house has a shared water supply and will have two bathrooms so I think I will be better going for a system rather than a combi boiler (the water pressure isn't great either). I will be converting the loft so am thinking of creating a separate heating zone for this (hot water cylinder would also go in the loft).
I will run the pipework myself and have noticed that some system boilers have a separate return for the hot water whereas others share a return for both heating and hot water. My question is, to be safe, would I be wise to run in a separate hot water return (22mm?) even though my final choice of boiler might not need it or can all boilers actually share a single return?
Also, for a relatively small system (11 radiators), would it be good practise to install a low loss header?
I will run the pipework myself and have noticed that some system boilers have a separate return for the hot water whereas others share a return for both heating and hot water. My question is, to be safe, would I be wise to run in a separate hot water return (22mm?) even though my final choice of boiler might not need it or can all boilers actually share a single return?
Also, for a relatively small system (11 radiators), would it be good practise to install a low loss header?