When I asked the Worcester guys they said worcester was the best. won the 'Which' award. The same with the Vaillant guy who said Vaillant was the best. Again won the 'Which' award. they both can NOT be the current winner... although the Vaillant guy did say he fits Worcester and other brands...
I was led to believe worcester were the market leader in recent times, and recently Vaillant have caught up and now over taken as the new number 1.. as Vaillant use metal internal components where as the Worcester only use plastic internals. and that Worcester were doing their best to catch up Vaillant however Vaillant were still the current no 1 , according to the Which magazine...
Now, until today, I thought Worcester and Vaillant were no 1 and 2 in any order. I couldn't care less which order as i was choosing between the best two. There were lots of other brands so if I choose either no 1 or 2 not knowing which is the best it would not make any difference, as especially if was to get 10 year warranty from the installation.
Now Iv come across a new brand which seems to as good or even better.. ????? Confused.
Veissmann have been around for years still family owned as well.
It's all about personal opinion, i've only been posting on the board a couple of days but i bet you've probably had people on here saying the likes of Ferrolli, Ariston, Saunier Duval, Chaffeteaux etc are all good boilers.
Do a bit of research, do Worcester or Vaillant make their own heat exchanger? Things like that. But remember that unless you're using UFH a condensing boiler will not get anywhere near the claimed efficiency.
Also no matter how good a company's reputation is you may get a dog of a boiler which was probably kicked down the production line and you'll get no end of problems with it.