Re: Cheap Ventilation System for Underground Shelters
things should be kept simple...
now how useful is this kind of gas mask?
this would be cool:
http://www.coaleducation.org/technol...e_Chambers.htm
"cheap" it`s not..but it will do the job for sure..
POTASSIUM SUPEROXIDE
or check out this website:
http://www.molecularproducts.com/
Last edited by capreycorn; 11-28-2008 at 10:25 PM.
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