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
Been fitting Baxi neta tecs for the last year, fitted about 60 and there not that bad but there now costing me around £100 more than before.
The Baxi also only has 2 years warranty, the ideal has 7
sounds to me like a very common problem with these boilers.
went too 2 of these with same problem last week, both were sludged up.
i cleaned both systems and put fernox tf1 filters on and they are both working fine now.
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Like I have said I worked for BG for many years , only left about a year ago.
All my points are fact. I still have lots of friends that work for BG. Never hear of any of the engineers that are happy, most would agree that they do not get enough time to do the job correctly, I could list...