Make: Projects – Magnetic HVAC return grille mount

The return grille mounting in my new house was very sloppy, with a mixture of Molly bolts, toggle bolts, and bare screws in drywall. The sloppy workmanship annoyed me, and made swapping the filter way more work than it needed to be, so I came up with this easy no-tools fix. It could easily be adapted to most steel maintenance panels.

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