VAILLANT ECO TEC PLUS 835

[5544]

Installed the above boiler today. They quote 14 ltrs per min hot water.
Looking at the heat exchanger, it does not look any different in size to the 832 (well I know, its only 3kw more!), but comparing this to the 838, that heat exchanger is nearly double the size? and the flow rate on that is not that much more 15.9 liars per min? am I missing something?

 

[Scott_D]

Something inside is bigger. The overall boiler depth is more than the 832

 

[IND_Nick]

Normally it is just a bigger plate to plate I believe.

 

[Brambles]

The secondary heat exchangers for the 832 and the 835 are identical, but the primary heat exchangers are different.