I'm building a small wood shop air cleaner to suck dust floating in the air. I understand a radial blower (squirell cage) is usually used to get some static pressure to overcome the resistance cased by the filter (for instance: Record Power 400). But as a radial blower is more expensive and quite a bit louder, I'm hoping to get about the same suction using two 19 cm (actual blade size) computer case fans (Spectre Pro 23 cm / 156 CFM / 1.81 mm H2O air pressure).
I understand that that putting them parallel doubles the air flow and putting them in series doubles the static pressure - not affecting the air flow much compared to one fan, but I still have a couple of questions with this:
- Does putting the fans in series give anything like the same static pressure like the Record Power 400 has? Just an educated guess... (the Record 400 is just an example of the approximate filtering capacity I'd like)
Also, putting the fans in series doubles the static pressure, but is it that simple in an air cleaner where there is a under pressured air chamber/cavity (the space between the filter and fans) in front of the fans? Obviously two fans in parallel would cause a bigger under pressure in this cavity.
- So which would filter better, the two fans in series giving more static pressure or two fans parallel giving a greater under pressure in the cavity between the filters and the fans?