What is an exhaust fan? (with photos)

Fans are commonly used in kitchens to release hot, humid air outside.

An exhaust fan is used to control the indoor environment, giving off unwanted odors, particles, smoke, moisture and other contaminants that may be present in the air. The hoods can also be integrated into a heating and cooling system. Common locations for exhaust fans include bathrooms and kitchens, and these fans are often very easy to install, so they can be placed in many other locations as well. For installation, people need some tools and should feel comfortable working with electricity to install the fan.

Fans can vent potentially hazardous gases from garages and other work areas.

A classic use for an extractor hood is in a room like a kitchen or bathroom. These places tend to get steamy, and the steam can promote mold growth, which is not desirable. An exhaust fan can be used to release hot, moist air outside, where it can disperse harmlessly. Fans can also vent cooking odors outside so they don’t linger indoors, and when people cook steaming food, the fan can help keep the air in and around the kitchen clean.

An exhaust fan can help ventilate a room and prevent mold or mildew.

For temperature control, an exhaust fan can be used in the hot months to push hot air outside, creating negative pressure inside the house. This promotes airflow when sucking in outside air, and the outside air can be cooler, contributing to the home’s cooling. Using an exhaust fan can be an alternative to air conditioning or a complement to the air conditioning system.

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Exhaust fans can be used in science laboratories to provide ventilation of harmful substances to those working in the laboratory.

These fans can also be useful in garages and workshops to ventilate the space. As these areas can sometimes acquire strong odors and people can work with potentially dangerous chemicals, exhaust fans can be used for comfort and safety. An exhaust fan is especially important when people are working with things like solvents, which are not healthy or safe to inhale. Likewise, it is important to release smoke from paints, varnishes and similar types of treatments.

These fans also have uses outside the home. Any enclosed space can be ventilated with an exhaust fan, from a large storage warehouse to a store. These fans are also used in environments such as science labs to provide ventilation that will pull potentially hazardous substances away from the people working in the lab. Likewise, they are used to ventilate operating rooms so that anesthetic gases are dispersed, and restaurants rely on exhaust fans to keep their kitchens clean.

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