On 9 Apr 2020 at 11:49:07 BST, "John" wrote:

On Thursday, 9 April 2020 08:29:24 UTC+1, RJH wrote:
On 25 Mar 2020 at 16:23:05 GMT, ""Dave Plowman" News)"

wrote:

In article ,
David wrote:
It's difficult to buy a truly bad new car these days, just as it's
difficult to buy a truly bad boiler. Pretty much all cars and pretty
much all boilers are fine.

Be interesting to know the average lifespan and number of breakdowns etc.
Saving a few quid on purchase costs may be poor value if it need lots of
repairs and early replacement.

That's the sort of data Which should be able to get from its members.

They do a general survey - 9000 households, 200 engineers. Top 5 Worcester,
Vaillant, Viessmann, Potterton and Ideal. Bottom 3 - Headline, Ferroli and
Biasi (same for engineers and households).

Depends on the data and criteria they use - sometimes service call outs are
taken into account, rather than just the quality of the appliance. The best
quality boilers on the market, that all those in the heating industry (not
plumbers) would agree on a Intergas, ATAG (both Dutch who invented the
condensing boiler) and Navien. Navien are Koran who are the biggest boiler
manufacturers in the world - been available in the UK for about 5-7 years.
Viessmann are below them, who have recently dropped in quality. The rest lag
way behind the top three with Worcester Bosch, Ideal, Baxi and Vaillant way
overpriced for what they are.

Intergas and ATAG are listed - mid table by both engineers and households.
It's quite a complicated mix of scores and methods. I find the Which guides a
useful starting point, but not much else.


--
Cheers, Rob