Central Heating

Getting the gas laid on! New central heating system! Blank canvas!

Anonymous user 06/03/2024 - 2.30 PM

I'm going to do as much DIY as possible to keep the cost down, get radiators the basic plumbing etc. We live in a small Bungalow, 5 small rooms and a long corridor, most of the plumbing will be up the loft area, as I want to drop copper pipes down each radiator/radiators in each room and to the combination boiler and get it connected by someone gas safe to get it certified. I work out the KW/BTU for each room roughly and in total is 13.5kw with 7kw over for heating up cold and definitely thinking of going for a combination boiler which I can place centre in the house, seen the various names of boilers Worchester, Valiant etc. So going on this very rough estimate, why do a lot of these instantaneous central heating boilers start more commonly at 24KW? Is this too much? Should I be looking at a 15kw? Am I missing something here? As a conventional boiler with tank would be traditionally less KW! (Even these on-line boiler company calculators seem to be on overkill and given me a 30kw model) Any help/advice do's and don'ts will be appreciated! It's early thinking stages!