Poultry shed ventilation and exhaust fan sizing calculator.
Estimate required CFM, fan count and evaporative cooling-pad face area from editable design assumptions.
Poultry shed ventilation and exhaust fan sizing inputs
Planning tool only. Space allowance, breed performance, ventilation, lighting, welfare, vaccination, medicine, feed formulation and local regulations require qualified poultry-management advice and daily farm monitoring.
Method: Required CFM equals bird count multiplied by your airflow target. Fan count rounds required CFM up by rated fan capacity; pad area divides airflow by pad face velocity.
Inputs used: Bird count = 10,000; Your airflow target = 8 CFM/bird; Rated fan airflow = 24,000 CFM; Static pressure at design point = 0.1 in. w.g.; Cooling-pad face velocity = 350 CFM/sq ft
Assumptions: The result uses the values, units and options shown in the input snapshot.
Scope and warnings: Planning tool only. Space allowance, breed performance, ventilation, lighting, welfare, vaccination, medicine, feed formulation and local regulations require qualified poultry-management advice and daily farm monitoring. Rounding and excluded real-world terms can make an external result differ.
How this poultry shed ventilation and exhaust fan sizing calculator works
Required CFM equals bird count multiplied by your airflow target. Fan count rounds required CFM up by rated fan capacity; pad area divides airflow by pad face velocity.
A worked example
10,000 birds at 8 CFM each require 80,000 CFM before design losses and redundancy.
Can this design a tunnel-ventilation system?
No. Fan curves, static pressure, leakage, inlet design, heat load, pad performance and emergency power need a qualified site-specific design.
Calculations run on your device. Review your results before exporting or sharing them.
Use the design airflow rather than fan nameplate alone
Required airflow is based on your CFM-per-bird target, and fan count uses the rating you enter. Static pressure and pad-face velocity remain visible design conditions.
Actual fan output changes with pressure, belt condition, shutters, inlet design and leakage. A qualified ventilation design must include redundancy and outage planning.
Published by ToolMitra — methods and editorial approach.