On Thursday, 9 April 2020 16:31:31 UTC+1, Robin wrote:
On 09/04/2020 11:49, John wrote:


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.



And the source(s)for all that ...?

Me, my name is on it.