Yep. Just put in a range hood and the spacing for the mounting screws wouldn't allow for attaching to studs (maybe one if you were lucky, but I was specifically

Yep. Just put in a range hood and the spacing for the mounting screws wouldn't allow for attaching to studs (maybe one if you were lucky, but I was specifically mounting it so the duct would go up between two joists (ie: between two studs). It came with some big screw-in drywall anchors, but I just sucked it up and cut drywall, put in a bit of 2x4 horizontally between the two studs, patched, and screwed into that. Peace of mind was worth the extra day of dicking around with drywall.