Our Woodshop has 2 ambient air cleaners overhead that help trap airborne particles.
For them to work, they need to be turned on! There are two remote controls lying around the space, typically stuck to a metal shelf via magnets. Either remote will work on both cleaners. If you don't want to have to worry about turning them off later, once on, you can push the timer button on the remote to set the timer to turn off after an hour.