10 years warranty on a Baxi platinum fitted alot of them and they work well a little bit older technology but tried and tested and no plastic components, viessmann I have done the training at their factory which was impressive and I have just quoted on my first install for a 222-f storage boiler so can't coment yet , ideal I am a member of connect and loved the mk1 logic plus+ which was great for the older generation with its digital read out telling the customer what mode the boiler was in with a 7 year warranty , but the recent mk2 which I fitted last week now has a horrible white plastic front case which will yellow and look shabby and go brittle in no time the vogue looks like a valliant eco tec plus inside so nice bit of kit but again looks like alot of plastic in the case in all honesty I am not fitting them anymore , have a look at worcester bosch 34cdi classic again tried and tested fitted one last week great boiler super quiet 5 year warranty plus 1 year extra for their new filter and another year for their controls I fitted the wave smart control so 7 years warranty and back up is good but will cost £2000+good luck with your choice regards k