If you’re looking to install a new fan in your home or business, you might be wondering whether it should be an exhaust fan or an intake fan. While the right choice depends on the specifics of your space and the type of fan you’re installing, there are some general guidelines you can use to know which type of fan to choose. In this article, we’ll break down the differences between exhaust fans and intake fans, and explain how to tell which one is right for your space.
What’s the Difference Between an Exhaust Fan and an Intake Fan?
Exhaust fans are designed to remove air from an area, while intake fans are designed to bring air into an area. From a technical standpoint, exhaust fans draw a higher volume of air than intake fans. This means that exhaust fans are better for removing particles, pollens, and other airborne contaminants from an area. Intake fans, on the other hand, are better for bringing fresh air into an area.
Exhaust fans are also known as “extractors” because they extract air from an area. Intake fans are sometimes known as “supply fans” because they supply air to an area. As a general rule, exhaust fans are better for removing odors, humidity, and contaminants from an area, while intake fans are better for bringing fresh air into an area.
How To Tell If a Fan Is Exhaust or Intake
If you’re unsure whether a fan is an exhaust or intake fan, there are a few simple ways to tell. First, check the fan’s label. Most fans have a label that will clearly indicate whether the fan is an exhaust fan or an intake fan. If the label isn’t present or isn’t clear, you can also look for a few other indicators.
Exhaust fans typically have larger motors than intake fans. This is because exhaust fans need to draw more air than intake fans. You can also look for a directional arrow on the fan itself. If the arrow is pointing away from the area, that indicates the fan is an exhaust fan. If the arrow is pointing towards the area, that indicates the fan is an intake fan.
When to Use an Exhaust Fan
As mentioned earlier, exhaust fans are better for removing airborne contaminants and odors from an area. This makes them ideal for use in bathrooms, kitchens, and other areas where odors and contaminants can accumulate. Exhaust fans are also a good choice for areas where humidity is a problem, such as basements and attics.
When installing an exhaust fan, make sure that the fan is powerful enough to move the amount of air you need it to. For example, bathrooms typically need a fan that can move at least 50 cubic feet of air per minute (CFM). In addition, make sure that the fan is properly vented to the outside. Otherwise, the air it removes will be recirculated back into the area, which defeats the purpose of an exhaust fan.
When to Use an Intake Fan
Intake fans are ideal for areas where fresh air is needed. This includes greenhouses, warehouses, and other areas where air circulation is important. Intake fans are also often used in conjunction with exhaust fans to create a balanced air flow in an area. By installing an intake fan alongside an exhaust fan, you can ensure that the air in the area is constantly refreshed.
When installing an intake fan, make sure it’s powerful enough to bring in the amount of air you need. In addition, make sure the intake fan is vented to the outside, otherwise the fan will simply be recirculating the same air. Also, make sure the intake fan is installed away from any sources of contaminants, such as exhaust vents or nearby factories.
Knowing the difference between an exhaust fan and an intake fan can help you choose the right fan for your space. Exhaust fans are better for removing odors and contaminants, while intake fans are better for bringing fresh air into an area. If you’re unsure whether a fan is an exhaust or intake fan, check the label, look for a directional arrow, or check the fan’s motor size. Finally, make sure the fan is properly vented to the outside.