Section 1
Auto-Zone Plus
1-18 Design Guide
Pressure Independent Zone Dampers
Pressure Independent operation is only available for round zone dampers. Use the chart
below to set the calibration of the zone damper after installation.
Damper
Size
Flow Probe
“K” Factor
6” 474
8” 950
10” 1417
12” 2120
14” 2908
16” 3700
Flow Probe “K” Factor =
CFM @ 1” Velocity Pressure
Table 1-3: Pressure Independent Flow Factors
Note: K Factors are programmed for each zone so correct CFM will be calculated
for the different size air valves.
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