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CFM for "air knife"???

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I need to build a new stand for my forge, and figured that while I'm at it, I can build in an "air knife" to cool the area right in front of the door.


Can anybody tell me what a good CFM range for this would be?


I'm thinking anything pretty light would work, but I'm confident at least some of you reading this already have done it and know for sure. :)




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I use a muffin fan for my small forge, the kind you get out of a computer. On my welding forge I have a squirrel cage from a furnace. That should pretty much give you the range. If you think of it as an air curtain instead of a knife it will de-tech the problem. :)

Don Fogg

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