We don't do gas. Friend has moved to ground floor flat near Chichester. West Sussex. Thinking about replacing old heating system with either a combi (to gain space) OR a condenser plus 6 rads and towel rail (boiler new pipes new rads). Has asked me for a very rough idea of costs / ballpark figure. I said I would ask around: hence this post. If anyone works that area and wants to respond, great-thanks. Yes I know you need to see the job but a rough ballpark would be helpful. Gas Safe only and he will check it. Ta.