I don't know but I think you can work around the backpressure stuff by just telling Flair you have a lot more vents in the house than you in fact do.
I'm experiencing a similar issue with heating. I set the house to 18.5C at night but leave only the master bedroom active. The main thermostat is in the living room. I wake to find the master bedro...
I would also be interested to hear about Matter support, and particularly in offline support. I've been using Flair just a few weeks and have already had trouble due to an apparent Flair server out...