exhaust fan

American  

noun

1. a fan for ventilating an interior by drawing air from the interior and expelling it outside.

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Etymology

Origin of exhaust fan

First recorded in 1870–75

Example Sentences

The small cell he was kept in, he said, had no windows and no sunlight, only two roaring exhaust fans.

From BBC

Based on these findings, the researchers would encourage turning on a kitchen exhaust fan while cooking on a gas stove.

From Science Daily

Small fans and AC units are often ineffective, since the air they blow tends to get sucked up into trucks' exhaust fans.

From Salon

The way to mitigate humidity here is through additional exhaust fans.

From Scientific American

You should keep bathroom exhaust fans off as much as possible if they bring in outdoor air, Dr. Green said.

From New York Times