I currently have a vaillant turbomax 242, its 11 years old and starting to cost me, my system has been well looked after (hot flushed yearly and topped up with x100) i'm now looking at replacing it with either an ideal isar 30 he or a worcester greenstar 30 si. Its being fitted by a Corgi family member who installs these boilers frequently but has no follow up if anything goes wrong ( he's an installer not repairer) price wise there isnt much difference so would value any feedback from anyone who maintains / repairs these. Cheers.