It is getting hotter and hotter here in Fond du Lac County and cows feel it too. For that reason, we are talking about ventilation in dairies. Dairy ventilation systems require optimized fan selection and design efficiency to combat severe heat stress and minimize hidden costs. Proper mechanical ventilation controls airflow, removes heat and moisture, and maintains air quality inside dairy barns when natural ventilation fails. Smart system design directly mitigates milk production declines and health issues in dairy cows during peak summer temperatures.