Why are some cattle barns open on one or two sides in hot climates?

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A large grain elevator and several metal silos stand on a farm surrounded by green fields, with hills and a partly cloudy sky in the background. — Farm building Grain elevator and silos on a small farm.

In hot climates, cattle barns are often designed with one or more open sides to facilitate natural ventilation and airflow, which is essential for mitigating heat stress.

Cattle, particularly those with heavy body weights and dark hides, are highly susceptible to heat stress, which can be fatal. By leaving sides open, farmers allow for the free movement of air, which helps dissipate the heat generated by the animals and prevents the buildup of stagnant, hot air within the structure. This design is a critical component of managing animal welfare in intensive livestock operations, where high temperatures can significantly impair health and weight gain. In addition to open-sided structures, sunshades are frequently employed to provide further relief from direct solar radiation.1