AIRFLOW RATE |
Defined as the air volume required to be extracted or supplied into a room during a given period of time. Several methods can be used to calculate the required airflow: |
CHOICE OF FAN |
The fan selection must take into account parameters such as: 1. Type of premises - industrial, commercial, domestic |
THE FAN LAWS |
These laws enable you to change the aerodynamic parameters: |
CONVERSION TABLE |
PRESSURE DROP - due to friction in the duct lenght These losses must be calculated accurately to select the correct fan and to give the airflow required |
SOUND LEVEL |
In the catalogue, the sound level specified in the performance guide is a pressure level generally measured at a distance of 1,5 metres from the inlet for centrigugal fans, and at a distance equal to 3 times the impeller diameter (with a minimum of 1,5 m) for the axial flow fans. |