[TheForge] a lot of unimpressive BS

[theforge@mailman.qth.net]

Ok I missed all of this.... I have no posts referring to this "discussion". I 
wonder if it was in response to my suggestion that CO and CO2 do not rise. I 
stick by my guns here. Once the gases cool, heavier gases will sink out. Tom 
is right in that the heated gas moves up (though I missed his explanation), 
this is due to a higher air pressure and a lower volume of gas. There for it is 
"lighter" than the cooler surrounding gases (Air). 

So by this logic a overhead hood is good to get many of the hot gases (and 
dangerous by-products of combustion) out of the shop, but the insidious build up 
of CO and CO2 will not be helped by an exhaust hood... unless it has a 
powerful fan. There for it is my suggestion that floor venting may in this case be 
more effective for these "heavier"  (read those gases with a higher real 
"weight" caused by the presence of carbon in the molecule or compound) gases to get 
rid of them.

My shop is so damned drafty that I do not have this problem... however in New 
England I have a heating problem :^)

I hope that a nasty argument did not start over my post


               Ted Jones


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