An extractor fan is an electrical appliance that helps in the ventilation of a room or a closed chamber. Extractor fans work by sucking out the hot or humid air through a narrow area, allowing fresh air to take its place from another opening. An extractor fan removes the air from the area instead of just circulating it around within the room.
Hot air that gets sucked by the extractor fan is pushed out into the open through a ducting system. Some extractor fans have sensors that activate when they sense steam in the chamber. Kitchen, bathrooms, laundry rooms and saunas are particularly prone to humidity-caused problems.
Extractor fans controllers use either separate switches, timers, pull cords, humidity sensors or a combination of the mentioned options. The device used in the extractor fan assesses the moisture in the room and thus aids in the removal of the moisture, preventing condensation.
The efficiency of the extractor fan depends on the size of the chamber and the airflow rate required for that space. The advantages of using extractor fans are that installation is simple and cost-effective; the disadvantages are that extractor fans are relatively noisy and can only provide localized freshening and ventilation.