At present I have a 25 year old Kingfisher CF60 floor standing boiler flued up a chimney and a single feed indirect Primatic cylinder with rads in all rooms using TRV's .The system is 22mm up to the hall with a manifold and 10mm after that ........I stay on the second floor of a block of flats 3 high .The boiler is situated in the kitchen . I remember years ago making enquiries about getting the boiler replaced and when discussing a combi boiler was told ( well it was by British G or Scottish G if you prefer ) that all the rads ,piping etc would need to be replaced as they would not be able to withstand the additional pressure from a ombi boiler .I recall finding that hard to believe at the time .
Would I be able to get the present boiler replaced utilising the present pipework/rads ,possibly with the new one being vented to an outside wall which is what most of the other residents seem to have. .This would let me block up the fireplace ..
Stuart