Poultry Log
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Tunnel Ventilation Design

Estimate recommended tunnel fan capacity and approximate static pressure for poultry houses using ceiling type, sidewall type, bird density, bird type, house dimensions, and desired air speed.

lb/ft²
ft
ft
ft
ft

Required for open ceilings to calculate attic volume.

fpm

Enter inputs on the left and click Calculate to view engineering results.

Results

Excellent

Warnings

Methods & Assumptions
    Disclaimer: This calculator provides an engineering estimate for planning and comparison. Poultry houses, equipment, birds, weather, and integrator requirements vary. Confirm major ventilation, heating, cooling, and animal welfare decisions with your integrator, poultry technician, extension specialist, equipment manufacturer, or poultry house engineer.

    Tunnel Ventilation Design for Wind-Chill Cooling

    Tunnel ventilation is designed to create a wind-chill cooling effect on birds during hot weather. It does not just lower apparent temperature through air speed; it removes heat generated by bird metabolism from the house envelope.

    Optimal design requires balancing the house's cross-sectional area, actual fan output under operating static pressure, and the maximum planned bird density during summer weights. Worn fans or loose belts reduce actual wind velocity significantly.

    Frequently Asked Questions (FAQ)

    Why does fan capacity not equal actual air speed?

    Fans move less air as static pressure increases. Pads, shutters, dirty equipment, tunnel doors, and house restrictions can all reduce actual airflow.

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