I have a exhaust fan design question that someone in this group may be able to comment on. We have a spray paint booth in our wood shop (2014-vintage) with a lab style fan (Vektor-H Laboratory Exhaust System - Greenheck Fan) on it. It is turned on and off as needed with a off/low/high switch, but when we turn it on, there is no apparent response for about 5 minutes. This makes it difficult to convince the booth users that the system is working, since they may complete their work in the booth (e.g. spray painting a piece) before the system is fully operational.
I realize that most lab fan systems are on 24/7, but I wonder if anyone has run into similar situations with systems which are designed to be turned on and off routinely?
Thanks for any thoughts about this.
Ralph Stuart, CIH, CCHO
Chemical Hygiene Officer
Keene State College
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