Is the total pressure rise that fan creates.
One factor that tells you how much the media äbdrar in volume due to fan pressure rise. 1 corresponds to the media is not affected.
Density is a SI unit and is a measure of a specific substance's density, i.e. mass per unit volume. A synonym for density that can sometimes occur are specific weight.
The efficiency of the fan itself.
Refers to the efficiency of the motor to a belt-driven fan.
The efficiency of the transmission of a belt-driven fan.
Specific heat capacity
Specific heat capacity or cp is a measure of a material's ability to store thermal energy. The SI unit for the specific heat capacity is J / (kg * K).
The temperature rise that occurs through the fan.