I live on the 3rd floor in a condo building and every time the people below me run their dryer, this horrible smell wafts into my unit from the dryer venting. It smells like nail polisher remover with a hint of wet dirt or mold. If I turn my dryer on, the smell gets sucked up & the odor goes away until the next time the neighbors run their dryer. Apparently all three floors share a vent pipe.

I'd really appreciate any information that any of you may have.

Thank you.

Put a damper on your dryer with a flapper valve. Then it will seal the pipe closed when another dryer comes on. You can get one at an HVAC parts supply house.

thank you so much! I'll try it.

thank you so much! I'll try it.

You are welcome.