What do you guys think about an attic furnace mounted directly in the drip pan. Normally, you’ll see a block under the unit. But when there is no block under the unit, is it installed correctly.
I would report it as an improperly supported Furnace.
I like to see vibration mounts or shock absorbers or hanging from rafter straps, to restrict the vibration (from the blower motor operation) onto the floor joists. This vibration can get very annoying.