What is a Ventilation Fan?

What is a Ventilation Fan?
As the name suggests, ventilation fans are used to ventilate a residential or commercial space. This works to bring fresh air outside and indoors. It helps air circulation inside the building or home preventing people from breathing stuffy, less oxygenated air. Without ventilation, you and others will have to breathe unfresh air.
Exhaust Fans
When pollutants and pollutants enter the air, exhaust fans remove them to provide fresh air. Some common pollutants and pollutants include smoke, moisture, dust and odors. Smoke from cooking and moisture from a hot shower can be efficiently removed from the air with this type of intake fan. If these pollutants are not removed from the air, you are likely exposing your lungs to breathing in harmful particles.
Both ventilation fans and exhaust fans work to create the freshest, cleanest air possible in the space where they are installed. The main difference between the two types of fans is their applications. A ventilation fan works to bring fresh air from an outside source to an enclosed space, while an exhaust fan removes pollutants from indoor air in a home or commercial area. Each fan has unique features that enable it to efficiently perform its intended actions.
Ventilation fans are used to circulate air in buildings or homes. This type of ventilation is known as mechanical ventilation, in which fans or blowers are used to create the movement of air. Another way to ventilate a house is to use natural ventilation, where air is moved by natural forces. A good design of a home will include as much natural ventilation as possible to reduce the electricity bill and protect the environment. However, installing proper fans is essential to ensure the air quality in the home is fresh and safe for people to stay in.

Ventilation Fans - Air Exchange Volume
The amount of air that needs to be ventilated is determined by the size of the space measured using the air volume. Different area will need different ventilation system. For example, it is recommended that the kitchen has 12 air changes per hour. If the kitchen has a volume of 5,000 cubic feet, 12 air changes per hour would require a fan with a capacity of 5,000X12=60,000 cubic feet (equivalent to 1,000 cfm). Cfm is cubic feet per minute and usually refers to the fan's specification.