Centrifugal fan mod to hepa floorbdryeeb
I picked this up at the Minnesota local home improvement store known as Menards. It was going for about $200. Modification could have been a lot better and definitely washers were needed. But it did the job
the original grill is visible in this photo. In the future I may do an article about how to use a box fan to accomplish the same . The type of fan visible above is what’s known as a centrifugal fan and deals with the back pressure of a filter much better but it is possible with the box fan.