Explore / Technical Research
Pressure and Airflow
First check whether the air can reach the target area, then check whether the volume is enough.
Airflow and pressure should be read together. Airflow describes volume, while pressure tells whether that air can still move through resistance.
Airflow describes how much air a blower can move in a unit of time. It is commonly written as m³/h, or cubic meters per hour; some catalogs may use m³/min or CFM, so values should be converted before comparison. Pressure describes whether that airflow can keep moving after resistance is added. It is commonly written in Pa, or pascals; higher-pressure data may use kPa, and some older materials may use mmH2O. In real equipment, filters, ducts, heat sinks, narrow gaps, and outlet structures all add resistance.
A blower may feel strong in open air but perform differently after it is installed inside equipment. The issue is often not the blower alone, but the airflow path. If pressure support is not enough, air may not reach the heat source or extraction point.
Selection should start from the route of the air. Check where air enters, where it passes through the heat source or dust area, and where it leaves. The more complex the route, the more carefully pressure should be considered.
A stable solution balances airflow, pressure, installation space, and resistance. The goal is not to chase the largest number, but to make sure useful air reaches the place where it is needed.