DIY Air filter

I made an air filter to hang from the ceiling of garage to catch all the dust. The corners are parametrically designed so any width filter fits in them. Surprise! There's only one filter size, 1". When the filter box is only made with tape, it doesn't stand up to much, and warps down in the summer heat. The rigid corners really fix all of the problems. Hanging hardware (not pictured in renders) is threaded heat inserts.