Total redesign, used to have three pipes all coming out adjacent giving neater finish, German immersion heater, German internal limit stats, better build quality.
http://hwch.myzen.co.uk/blog/category/vaillant-system-boiler-and-hometronic/
One of ours from 2008.
http://hwch.myzen.co.uk/blog/category/vaillant-system-boiler-and-hometronic/
One of ours from 2008.