The formula to calculate the Maximum Duct Length (L) is:
\[ L = \frac{P_f - P_l}{P_u} \]
Where:
The maximum duct length is the longest length of ductwork that can be used in a ventilation system without exceeding the available fan total pressure. This length is determined by the pressure losses that occur due to friction and other factors as air travels through the duct. Ensuring that the duct length does not exceed this maximum value is crucial for maintaining efficient airflow and system performance.
Let's say the fan total pressure (P_f) is 500 Pa, the pressure losses (P_l) are 100 Pa, and the pressure loss per unit length (P_u) is 5 Pa/m. Using the formula:
\[ L = \frac{500 - 100}{5} = 80 \text{ meters} \]
So, the maximum duct length (L) is 80 meters.
