Air Exchange Rate for Welding Shop
Air Exchange Rate for Welding Shop
(OP)
Does anyone know the general rule of thumb for an air exchange rate inside of a welding shop? I am trying to design a system to clean the air in our welding shop and cannot come up with the simple baseline. Ive spoke to several manufacturers / suppliers of air cleaning systems and no body will flat out tell me. Backing into the data ive collected the numbers range from 2 to 15 air exchanges per hour. I found one table on engineering toolbox that says 12 to 15. The one very helpful duct collector manufacturer tells me industry standard is 5 to 6. Any help would be appreciated.





RE: Air Exchange Rate for Welding Shop
RE: Air Exchange Rate for Welding Shop
Is it a bench hood? If so, it wants to slots sized at 2000 fpm connected to a plenum behind it sized at 1000 fpm.
Like stated above, you dont want to provide air changes, you want to exhaust the contaminants where they are happening.
Good luck
knowledge is power
RE: Air Exchange Rate for Welding Shop
The ACGIH and ANSI Z49.1 should provide additional guidance. Depending on the analyte, I have typically used (with enclosure) 9" capture distance and 100 fpm capture velocity.
RE: Air Exchange Rate for Welding Shop
Check with Plymovent Inc.
B.E.
RE: Air Exchange Rate for Welding Shop
Double posting simply dilutes the answers you are going to get and annoys some of the members here.
B.E.
RE: Air Exchange Rate for Welding Shop
American Conference of Governmental Industrial Hygienists = ACGIH
RE: Air Exchange Rate for Welding Shop
knowledge is power