I know that Goodman has their own filter for my ARUF air handler but I haven't seen it. How does this "filter section panel" differ from a typical 1" pleated filter? How does it fit better in the rack?
No matter what, you will need to "adjust" the opening of the rack so that panels are not bent in. The washable filter is thinner with a more rigid plastic frame so it is just easier to put in and pull out then a paper framed filter. Besides, there is no paper framed filter that properly fits that space and all 1" pleated filters are too restrictive to be using anyway.