Hi all, I'm buying a house which is a 1970's 4 bed detached in surrey which has original warm air heating. I am after some advice, are the warm air systems any good? I'm going to get some quotes for a complete new wet central heating system and also a new warm air boiler ideally with a built in integrated hot water circulator to get rid of the hot water cylinder. have any of you guys had experience with warm air systems and what sort of prices am I looking at for all the options? Is it worth replaying the whole system for rads? Thank in advance.