darkroom ventilation

a short term solution, get a respirator that will filter out the fumes.

Rick A said:

Buy a cheap range hood and mount it above the sink. You can duct it anywhere from there. The upshot, exhausting fumes where you need, extra light above the sink, plus the benefit of not having to rip out the light in the center of the room.

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This is actually a really clever idea-add some basic sides to it and some possibility for a door on the front from some cheap material and you just essentially built a vent hood of the type labs use.
Range hoods are really cheap used, and you can remove the motor and attach a more powerful blower in the vent hose and box around it with a foam lined box-that will greatly quiet it down.

I need to vent my own darkroom, so thanks Rick A for this idea.

I use a dry, non-vented DR located in our utility room. The room size is 6x11 ft with 8 ft ceilings. Ventilation is always recommended. However, switching to a water stop and TF-4 fix removed previous nasal irritations experienced with a conventional acid stop/fix. Other factors are my modest tray size, 8x10 or smaller and the need to move a print from the fix tray to a water hold tray located outside of the DR. So I am opening the door and exiting the DR every 5 to 10 min. I could also cover the developer tray but have not found that necessary.