Dairy Ventilation

Welcome to the Dairy Ventilation Calculator — a free UW-Madison Extension tool for dairy producers to support decisions about heat stress management and mechanical ventilation in dairy barns.

FEATURES
- THI (Temperature-Humidity Index) with location-based weather
- Adopting Fans calculator — size and select fans for your barn
- Evaluating Ventilation calculator — assess existing ventilation performance
- Fan Efficiency comparison chart — compare fan models side by side
- Payback Period analysis — estimate return on investment for upgrades

WHO IT'S FOR
- Dairy producers managing heat stress in lactating cows
- Farm managers planning fan upgrades or new ventilation systems
- Extension educators and dairy consultants


ABOUT
Developed by Nilroth Ly and Nesli Akdeniz in Biological Systems Engineering at UW-Madison as an educational and decision-support tool for dairy producers. Calculations follow established methods used in dairy ventilation design. Results are intended to give general guidance. Final decisions and outcomes remain the responsibility of the user.