On 21 Dec, 21:28, wrote:
Thought some of you might like to know the best buys in Which?
Best combis:

Baxi Duo-tec
Potterton Gold
Vaillant ecoTEC
Vaillant ecoTEC(Larger model)

The Baxi and Vaillant were the only two boilers that met the claim of
91% efficiency.

Which is interesting.

The Baxi & the Potterton are made by the same company.

Looking at the installation manuals, the Baxi and the Potterton
mentioned above seem to be the same boiler.
Spot the difference;

http://www.baxi.co.uk/Downloads/Baxi...on%20Guide.pdf

http://www.potterton.co.uk/products/...structions.pdf

In fact, the circular stainless steel heat exchanger in all the above
boiler looks very similar. I think it may be made by Giannoni, or made
under licence from them.

Anyone (excluding Drivel) know more?