As of late September 2026, the bathroom fan at my Port St. Lucie house runs every time somebody showers, and for years that hum was all the proof I needed. Fan on, mirror clears, job done. It never occurred to me to ask where the air went after it disappeared into the ceiling.
Here in Florida, I climb into the attic more often than most people my age would admit to, and that is the only reason I ever thought to look. A fan duct can end almost anywhere up there. The only way to know where yours ends is to follow it with a flashlight.
Have a pro vent the bathroom fan outside.You describe the fan duct ending in the attic, and local pros who take the job call you, keeping your number private.“My bathroom fan vents into the attic instead of outside.”→Free for homeowners · Your number stays private
What the Department of Energy says
The U.S. Department of Energy’s guide to home ventilation is blunt: “Kitchen and bathroom vents should lead directly outside and should never be vented into the attic, where moisture can cause serious problems and pose potential health problems.”…