mstrlucky74
Senior Member
- Location
- NJ
What do they mean by direct exhaust? As opposed to what?
The code this is pulled from talks about supply air over 2,000 cfm. I would imagine direct exhaust would be exhaust fans that do not have any smoke/fire dampers in their ducts.
In my experience, the only time we shutdown exhaust fans, other than smoke control, is if they feed through smoke/fire dampers. Stop the fan to avoid damage to the duct while the damper is closed.