Ventilation control system

Details Ventilation control system Ventilation control system

F - Mech Eng,Light,Heat,Weapons

24

F

98/42

F24F 7/007 (2006.01) B08B 15/02 (2006.01) F24F 11/00 (2006.01)

Patent

CA 1180590

VENTILATION CONTROL SYSTEM Abstract The unnecessary removal of heated or cooled room air by fume hoods is prevented during off-peak periods through a manual and automatic fume hood venti- lating system. Ventilation (exhaust) air quantities are reduced in response to operator and/or automated pro- grammed control of the exhaust fan shaft speed. The safety integrity of the fume hood system is improved by providing the operator with visual and audible dynamic feedback of the system operating status. Room air bal- ance is maintained through subsequent reset of the room supply air coincident with exhaust air quantity adjust- ment. Building make-up air balance is possible using individual instantaneous exhaust flow summary signals to control the outside air flow rate.

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