I have a carrier infinity variable speed furnace, a single stage comfort series a/c unit; and we just added the basement as its own zone. Previously, the bedroom was 1 zone, and the main floor/basement was another zone. So now we have 3 zones off this system (each floor its own zone).
Now that I have 3 zones (instead of 2), I've been paying attention to what the Infinity Thermostat says as to static pressure.
When only 1 zone is calling for cooling, I've seen static pressure from .8 to over 1.1.
But when I run the AC checkout test on the thermostat, which I assume runs the whole system (all 3 zones at once), static pressure is okay, as its around .55 .
So is it bad that when only one zone is calling I have way above the recommended (from what I see on this site) static pressure of roughly .50 ?
Or is high static pressure to be expected when only one zone on a 3 zone system is calling? Note that the zone capacity is shown as:
main floor 43%
damper leakage 8%