Due to continuous product research and development,
the information contained herein is subject to change without notice.
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Pressure Drop And Sound Data
The sound levels in the kitchen under an exhaust canopy are
influenced by many external factors including the room and surfaces,
the duct, the exhaust fans and supply fans�
The graphs show the noise level of the exhaust air passing through
the exhaust hood (typically 50 – 65dBA) is low in comparison to
ambient noise levels in commercial kitchen (typically 70 – 75dBA)
environments� Closing the slide dampers increases the exit velocity
and increases the air noise level�
The Exhaust Pressure drop measured across the hood increases with
the airflow� The pressure measured in the duct for a given airflow
increases as the slide damper is closed� The dampers should not be
closed more than 50%�
For any given airflow, the pressure drop measured at the TAB point
can be determined by a constant relationship;
Q = K * √TAB�
Cleaning and Maintenance
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