(08-03-2015, 01:56 PM)OpalRose Wrote:(08-03-2015, 01:48 PM)Kevco1 Wrote: It's actually just a small rectangular filter that goes in behind the foam filter in the back..
The small fine white rectangular filter is optional and goes in first, then the black foam filter. I don't see how that impedes the air flow, although these filters should be replaced monthly. The black foam filter can be washed.
Yes, I installed exactly the way you said. That area is the air intake for the machine. When you install the filter it reduced the pressure going into the machine so the pressure coming out is reduced as well. It's definitely noticeable. My thought is that the pressure setting needs to be increased to compensate for the reduced pressure coming in going through both the foam filter and the Hepa filter. My question is how much higher should the pressure be set to bring it back to the original pressure coming out? Thanks.