I'd add that the odour from a new unit may play havoc with peoples breathing if located closed to their work area, i.e. on their desktop. This may be something specific for me... but I expect it is a reality (not something else causing this issue for me) . Placing the UPS on the floor and turning on a fan "helped"....
EDIT: I do appear to have put this on the wrong thread (sorry @arnb ), still, hopefully useful for people to know, but it was the continuation of some comments I made here:
