Controlling Outside Airflow in VAV Systems

Elovitz, Kenneth M.
October 2009
Heating/Piping/Air Conditioning Engineering;Oct2009, Vol. 81 Issue 10, p24
The article focuses on the mechanism of mixed-air-plenum in controlling outside air quantity in variable-air-volume (VAV) air handling systems. It notes that system should produce the minimum outside air quantity along with varying load-dependent supply-air quantity. It cites methods including direct measurement of outside-air via pitot or electronic device, fan tracking which measures supply and return air flow, and utilization of gravity dampers to control building pressure.


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