if it's like vaillants controller and viessman the second zone on the display only activates when the bosch zonal control unit is connected...
there are operational advantages when using boiler manufacturers controls...mixing and matching with other makes is all well and good but there will be a few "rough edges"...
the disadvantage of mixing other makes is that you end up with a littany of controls that don't really talk to each other and offer the customer twice the amount of learning they have to undertake to make there system work..
Hi Alex,sure I take on board what you are saying but I think we are looking at this from different prospectives
What I am saying is that any system can be turned in to a weather compensated system regardless of the whether the boiler in question directly supports it or not
For instance at home I have a Ideal C28 combi fitted, It does not support modulating controls but.......
I have one of
these lying around that I may fit if I ever get round to it (doubtful
)
Add a few mixing valves and sensors which I also have and if I like I could have four floors each with separate compensated flow temps And a ct circuit for hot water
But thing is I got it for free as it came out of a job, you may have noticed the price of it, if I had nigh on £700 to spend I think the C28 would be coming out
And as you say a boiler with better communication fitted
But you can get cheaper stand alone units, for instance in the ops case they could fit the dedicated controller which would compensate the rads flow temp,
The underfloor on the otherhand would just use what ever it needs via the blending valve as it will always be less than the rads anyway
If the desire was to have the ufh truly weather compensated too then the blending valve could be taken out and replaced with a mixer controlled by a separate weather comp controller
Matt
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