10/16/2026
MY BATHROOM FAN IS RUNNING, BUT THE MIRROR STAYS FOGGY FOR AN HOUR
We get calls like this all the time. Some people also mention a damp smell that won’t go away or mold that keeps coming back on the ceiling no matter how often they scrub it.
Most of the time the fan itself is fine. The problem is the duct behind it: it’s crushed, disconnected or doesn’t vent anywhere at all. In older NYC buildings we find this constantly.
Take a look how our NADCA-certified technicians install a new vent line in a bathroom:
We open the ceiling to reach the old duct.
We run new rigid metal ductwork. It’s smooth inside, so air moves freely and it doesn’t sag.
We fit every section and fasten it tight with screws, so there are no gaps or leaks.
We connect it to the exhaust fan and check the airflow.
We install and replace bathroom exhaust fan ducts and vent lines in apartments, brownstones and homes across NY and NJ
Sound familiar? Green Ductors can fix it. Call us to book your visit (888) 334-1612