Answer / Kulmani Azad

To calculate the induced air capacity (IAC) of an ID fan in a boiler, follow these steps:
1. Determine the fan diameter (D).
2. Calculate the cross-sectional area of the fan wheel (A) using the formula A = π * (D/2)^2.
3. Find the fan's volumetric flow rate (Q) in cubic meters per minute (m³/min).
4. Measure or determine the fan's static pressure (Ps).
5. Use the fan manufacturer's IAC formula to calculate induced air capacity: IAC = Q / Ps.

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