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How to calculate EPEF in poultry?

European Poultry Efficiency Factor (EPEF) is calculated as: [Livability (%) × Body Weight (kg) × 100] / [Age in Days × FCR]. Scores above 400 indicate top commercial performance.

Is Poultria free for university courses?

Yes, Poultria provides 100% free open access for all university courses, veterinary faculties, and student researchers worldwide.

Poultry Ventilation Fan CFM Calculator — Minimum & Tunnel Mode

Interactive Tool

Exhaust Fan CFM Ventilation Calculator

Calculate required minimum and tunnel ventilation fan power to remove moisture and combat heat stress.

🔬 Scientific Disclosure: Required Air Exchange Equations

Minimum CFM = Number of Birds * Age CFM Factor (e.g. 0.16 CFM/kg at start)
Tunnel Airflow (m³/s) = Cross Sectional Area (m²) * Target Airspeed (e.g. 2.5 m/s)
Runtime (%) = (CFM_required / Total Operating Fan CFM) * 100 (in 5-min cycle)

Minimum ventilation prevents moisture accumulation in the litter (avoiding footpad dermatitis and ammonia spike). Tunnel ventilation utilizes wind-chill convective cooling to lower the effective temperature felt by feathered birds during hot weather.