went to a customers today where they had a new worcester combi fitted.the original boiler was an open vented system.,the installer removed old boilerfrom downstairs,bricked up/made good,relocated new boiler to airing cupboard,upgraded gas supply,3x flue extensions roof terminal and pitched roof slate,magnaclean,scalemaster,full system flush,rf stat and programmer,6x trvs,no corners cut,all in for £1800,how can you beat that?