No there is no damper, it's full open, constant volume. The full open sash height is 24". According to the design documents, nameplate, and maintenance staff the fan is designed for all hoods to be run at full open simultaneously.
I didn't check the IH sticker, but I will....what info can I...
I have a client that has asked me to investigate problems with a fume hood in one of their labs. They are only able to reach an average of 46fpm across the face with the sash fully open.
I'm stuck. The airflow into the lab is good, the duct sizes are good, the exhaust fan (multiple hoods go to...
