Tales from a Ventilation Lunatic

[sternwake]

Ive a lightweight light duty .20 gallon kitchen  trashbag.

.THis equals 2.73  cubic feet or so of volume.

 Completely deflate bag, rolling it up on a cardboard roll, see how long it takes fan to fill bag to maximum volume at different fan speed/wattage.
OBviously imperfect test, and plenty of.room for.error.
Moves 32 cfm through single hepa.filter cartridge at 0.29 amps.
67 cfm at 1.7 Amps

.I Cannot roll up inflated bag onto cardboard tube above 1.7 amps without puncturing taut bag with fingers.
Fan will draw over 3 amps at 12.8v.

Smoke testing reveals no filtered air does an
 immediate u turn  to be refiltered, though there is a low-pressure area over fan hub which will suck smoke back down to it, before it gets mixed and ejected invisibly.

This is more flow than i would have guessed is  occuring 

.  I can easily stack two filters, to halve the restriction
.
This test was performed without activated charcoal wrap.

Ive Not yet tested papst hepa.fan.