[TheForge] coal forge exhaust system

[Paul Sperbeck]

We in the blacksmith community tend to throw the term venturi around 
quite a bit, when more often then not we are referring to things 
approximate venturis.

Many gas burners for forges reference venturis, but to very few of them 
look like this:

http://www.duncanshearer.co.nz/kilnplans/burners/venturi/venturi%20burner-01.jpg

So when I referred to a venturi vent system I had in mind something more 
like this:

http://www.quickdraft.com/products/venturi-exhauster

Which is more than a small pipe stuffed into a bigger one...

In our northern climate, we need to extract the noxious stuff with out 
freezing ourselves to death. By using the quickdraft as a model, and 
drawing outside air to supply the fan the heat loss in the shop can be 
held to a minimum.

paul
-- 
"This is only temporary, unless it works."
--Red Green

No trees were killed in the generation of this message,
but a tremendous number of electrons were terribly inconvenienced

Try to notice the thing that happened just before the thing
you didn't want to have happen happened!

If you are using violence and it does not work, You are not using enough.

Life's tough, pilgrim, and it's even tougher if you're stupid. - John Wayne

Resistance Is Not Futile!  It's voltage divided by current.