Seems Dennis Brady wishes to re-invent the wheel:
http://www.lampworketc.com/forums/showthread.php?p=1984187#post1984187 (top of page two)
I’m hoping we can find some “formula” that equally, and with reasonable accuracy, considers hood size, distance from torch, and fan capacity. Any of those three factors is meaningless without considering how it’s affected by the other two.
Actually, Dennis, if you would take the time to do some very basic research (such as reading up on ventilation basics — you don’t even have to read what I’ve written, read Dale’s writings, read those of OSHA, NIOSH, or even the ACGIH) you will see that the formula already exists. Read the rest of this entry »
