A few months ago my wife mentioned that she had seen something about laser printers letting a lot of toner dust escape. It came up because we have been noticing it at our house. I print several large runs of advertising stuff per month on my Brother MFC 9480 laser printer. I used to have an Okidata 5150 and we noticed it with that one but not as bad.
She noticed it from some black dust at some supply registers. I noticed it more from changing the filters. I kind of dismissed it when she brought it up and thought it might be from candles or something. But she stopped the candle burning lately. Today I changed the filters. These filters were maybe 45 days old. The amount of black dust on them amazed me, I had done some extra printing this month. When you touch it, it definately feels like toner and stains like toner.
Has anyone heard of this or noticed it themselves? I am trying to decide what to do about it. I am not overly concerned about it from a health perspective, though this last set of filters really surprised me. I am concerned about the dirt in the ductwork and house.
I am thinking about redoing my office and putting the printer in an unventilated closet and maybe putting a portable filtration device in there with it. But the unit produces a good deal of heat when working so sticking it in an unvented closet may not be good. So that may not be an option.
I also thought it was interesting and telling of the poor HVAC design of most houses in my area (this house is 8yo) that the dirtier filter is the Downstairs unit. My office and the printer is upstairs. There is a room return vent in the same corner as the printer. You can see on the cleaner filter how one corner is dirtier and that corresponds with where the room return duct ties into the return plenum. But judging by the amount of dust on the downstairs unit most of the air from my office goes out the door and into the downstairs return that happens to be located at the top of the stairs - just outside my door.