I built a ceiling mount air cleaner a few years ago and it has hung dutifully from the ceiling until I took it down to finally finish the ceiling with beadboard.
I got around to hanging it today and stared at the ceiling for a long time before I decided that the place where it was hanging gets in the way of a wood rack on the wall. It had always bothered me but apparently not enough to move it at the time.
Since the ceiling job was underway, the air cleaner has sat on one of those cute little Harbor Freight furniture dollies over in the corner. And there it was as I was scanning the ceiling trying to fit the air cleaner in between lights, dust ducts, and the attic ladder. Things were looking tight.
While staring at the air cleaner sitting on the dolly, I recalled a discussion some time back where folks were questioning the value of a ceiling mount air cleaner that essentially drew air and dust up past your nose before it was actually cleaned. And then I looked back at the cleaner on the dolly and started envisioning rolling it around to where the action was.
The air cleaner has found a permanent home on the dolly and now I can breathe easier.