I'm planning on upgrading my CH boiler, currently an open vent set-up with header tank etc. I don't want a combi but a sealed system seems simpler, an obvious choice. Why would I bother with a header tank if I don't have to?
Is there any advantage of header tank /open vent set-ups or are they just a hangover from the past?
Is there any advantage of header tank /open vent set-ups or are they just a hangover from the past?