Guide to Fan Sizing

The first variable is airflow this is usually calculated using CFM or cubic feet per minute. This is the amount of air that can be moved from one space to another. If you don't know how much CFM you need you can use your duct and pickup points to help calculate this.

Static pressure is the force created by a fan to move air through a ventilation system.

Let's talk about location. Location consists of a few things. We're talking about altitude, humidity (is the collector inside or outside), and is there any area classifications that need to be considered. For example, if you're in a humid location you're going to need to have a special paint coating on your fan to protect it from those elements. Altitude, temperature, and humidity are all variables used to size the right fan wheel for your system. if your environment has any hazardous classifications this is an important factor when sizing your fan and making sure the motor meets those specifications.

The power requirements for your fan can vary depending on location. Three-phase power is the most commonly used. However different countries have different standards and you need to consider those.

When sizing your fan the type of dust collection system you have will definitely impact the type o fan you select. If you have a cartridge collector you may have a top mount fan. These fans can range from 2000 CFM up to 10,000 CFM. If you have a baghouse these fans can be much larger and they're usually ground mounted. These can go anywhere from 10,000 CFM upwards of 100,000 CFM.