You would probably be OK using drywall anchors. There is some mechanical stress when removing/installing the filter housings, but I think anchors would hold up to that as long as you were careful.TomP10 wrote: I am worried about the ability of drywall holding the filters. Are they heavy enough to pull loose? Is this something to be worried about?
What I recommend... Mount a board long enough to span two studs and screw the board into the studs, then mount the filters to the board using wood screws.