Box Fan Cfm Static Pressure

1 inwg 25 4 x mmwg.

Box fan cfm static pressure.

Static pressure sp static pressure is the resistance to airflow friction caused by the air moving through a pipe duct hose filter hood slots air control dampers or louvers. If you know one cfm s p point of a system you could use fan law 2 to determine the static pressure for other flow rates. Set on low these fans runs at 1 450 rpm and push 37 85 cfm while producing just 23 dba. Whether exhausting air or bringing fresh air into a structure the calculation produced should help to figure out the size of fan s required to accomplish the air exchanges needed.

Static pressure is rated in inches water gauge inwg or the metric equivalent millimeters water gauge mmwg. Once any element of the system changes duct size hood length riser size etc. The fan generates air pressure of 7 63 mmh2o and a healthy airflow of 110 cfm so it provides both high static pressure and high airflow. Technicians typically measure static pressure in inches of water gauge.

A larger static pressure forces the fan to consume more power to expel the same amount of air. A matching of the system occurs when the airflow delivered by the fan at a given static pressure equals the static pressure resistance of the. This makes them better than high airflow counterparts at moving air through radiators case meshes and dust filters. An exhaust fan s static pressure also known as its pressure drop describes the resistance the fan must overcome.

Corsair for example sells quiet edition high static pressure fans. Static pressure fans are designed to combat this with a different fin design. The system curve changes. They apply to a fixed air system.