sizing boiler - two boilers?

[virgilns]

So it seams Atag Q series are s semi commercial boiler and overkill for my requirements...that's coming from Atag technical support today! An A series would suffice and they do a 30kw system boiler in that range which was what was reccomended

So the choice seems to be...

ATAG A320S 6.1kw - 30.9kw

Intergas HRE30SB 7.6kw - 27kw

Vaillant Ecotech plus 630 10kw - 30kw

Of these, the Atag seems the best bet as it modulates down farther...or have i missed a point here??

Never even heard of Atag, WB 30 CDI would be a good choice and it comes with 5 year warranty
Also the Baxi platinum comes with a 10 year warranty.
You could also use a combi for one side of the house and then have a cylinder as well, use the heating side of the combi to zone the system

That's quite funny I started. The thread saying I wanted a wb and it got negative response, with suggestions for stag, vaillant and intergas seeming the popular choices...intergas certainly seems to get good press on other threads...

No combos for me thanks...system boiler is about as complex as I'm wanting to go