Thread: Make Up Air?
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Old 2013-10-07, 7:14pm
Dale M.'s Avatar
Dale M. Dale M. is offline
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Join Date: Jun 10, 2005
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Several things I am concerned with..... Make up air duct is only 8 inch where exhaust duct is 12 inch.... Make up air duct should be same size as exhaust, when doing fan calculations its easier because you are trying to find static pressures on a total of 36 feet of duct.... Also make up air duct should extend into studio further so it is behind you as you stand/sit at torch.... OR be brought up under bench in front of you so there are extra bends (static pressure) in calculations...

Also you refer to this as a alley with little air flow, this sets off sort of a alarm bell as even with the separation of exhaust and fresh air intake, system has a certain dependency on natural airflow's or drafts or breezes in alley way to ensure a supply of "fresh air"... IF area is to restrictive to air movement you will be drawing in the harmful things you are actually trying to expel...

Dale
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