Which boiler is best Vaillant pro28kw, Worcester Bosch 30kw or Viessmann 100wbib 35kw?

to be honest and i will be!it does not matter with in reason what you put on the wall,its who puts it there, sad but true!!!get youself a boiler with a 5year warranty,make sure they fill the bench mark out at the back of the instruction manual,IE tradeing name,gas reg number,phone number etc,etc.then if it goes tees up you can do something about it.you would not believe how many boilers i have been to where the customer has the manual and it is blank!!! LOT OF DODGY INSTALLERS OUT THERE!!!!!!! TOMMY

Hi, Buy the Veismann. We install them most of the times. No problem at all. Regards, I.

Hello, the Viessmann probably is the best one out of those but I find that Viessmanns can be affected quite badly by dirty systems (not Viessmann's fault but the installers'). If you get a Viessmann, make sure they do a very good POWER flush on the system or similar with *flushing equipment* AND chemicals. Afterwards get them to put a decent magnetic filter such as an Adey, Fernox, Sentinel on the boiler return pipe to protect the boiler and dose with the right amount of inhibitor. If in a hard water area, also get a scale filter on the cold inlet to the boiler.