Yes, exhaust fan is use to exchange indoor and outdoor air.
When the room is humid or the air is dirty.
Yes, exhaust fan can remove the dirty air to outside.
The standard size of home ventilation exhaust fan is basically 4'' 6'' 8'' 10''12''.
Jan 20, 2025
6 Inch Kitchen Wall Extractor Fan: Perfect Combination of Strong Airflow and Low Noise