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> Your point is..........????????????????????? Your proposed idea is
> contrary to the laws of physics. A filter is basically a fine network
> of small obstructions to airflow that trap particulate matter.
> Therefore it will decrease the volume and/or pressure of air from one
> side to the other. The only way to beat this is to remove some of the
> "mass" of obstruction (ie filter), increase the volume of
> air being filtered at any one given moment, or force the air through
> the filter under pressure.
How about considering the surface area of the filter. This is the principle of the fanfold filter design and has a huge bearing on the above.
A flat filter can never be as efficient as a folded design.
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