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Pressure Independent Variable Air Volume ( Single Duct)
The above data for Single Duct VAV units.
Damper leakage tested at 1.0” Differential Pressure.
Casing has been leakage tested at 0.5” Differential Pressure.
The Leakage ratings as per ASHRAE 90.1 & AHRI Standards for VAVs.
Each Pressure input
signal is routed to the
centre averaging
chamber with equally
made concentric circular
areas (3, 4 & 5
Concentric holes based
on inlet size.
Damper
Inlet
Leakage Characteristics for Single Duct VAV