Box Fan Cfm Static Pressure

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.

Box fan cfm static pressure.

Technicians typically measure static pressure in inches of water gauge. Static pressure fans are designed to combat this with a different fin design. This makes them better than high airflow counterparts at moving air through radiators case meshes and dust filters. Set on low these fans runs at 1 450 rpm and push 37 85 cfm while producing just 23 dba.

Static pressure is rated in inches water gauge inwg or the metric equivalent millimeters water gauge mmwg. 1 inwg 25 4 x mmwg. Corsair for example sells quiet edition high static pressure fans. 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.

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. If the estimated static pressure resistance is greater than the available static pressure of the fan the airflow cfm delivered by the fan decreases until the system pressures match. 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. A larger static pressure forces the fan to consume more power to expel the same amount of air.

The system curve changes. They apply to a fixed air system. An exhaust fan s static pressure also known as its pressure drop describes the resistance the fan must overcome. 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.