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Its been determined that once the space starts to hit a -.1 it takes upwards of 60lbs of pull to open the door. In case of an emergency its a concern on whether a 4'10" 90lbs young lady can open the...

I am a Clean Room Specialists and am having some issues with a dynamic system which is being controlled by Price vav's at which are attempting to maintain a negative pressure and constant flow in a...