Filter Specs
Filter Specs
Ken,
Best advice I can give you is to go over to Wynn's site and start reading. Rick does a nice job describing the media, what to look for, the pros and cons of ASHRAE's test procedure, etc.
Essentially what you want is media that will handle the airflow, or somewhere between 800 and 1200 CFM. Then you want to see that it captures a very high percentage of 0.5 micron particles.
The thing about media is that, for a given filter area, which also translates roughly to assembled size, the smaller the pores in the stuff, the more material you need. Hence Pentz's, Clearvue's, and Wynn's recommendations for a pair of about 500 CFM filters for these units.
And yes, Clearvue's competition uses a single filter. What you'll find when you start delving into it is that, since the media area is about the same as Wynn's, either the pores are larger or they're running the filters closer to maximum, which also means as the filters age, the pores will clog and you'll end up with less airflow.
Anyway, for what its worth, that's the edited highlights. And I hope I didn't slaughter Rick's explanations too badly.
Regards,
DWD