Why are containers typically fitted with ventilation systems?

Containers are typically fitted with ventilation systems primarily to circulate air and reduce moisture buildup. The presence of ventilation helps to prevent condensation inside the container, which can lead to mold, mildew, and potential damage to the cargo stored within. When air is able to flow in and out of the container, it helps maintain a stable internal environment, mitigating the effects of humidity that can cause corrosion or spoilage of sensitive materials.

This functionality is crucial for various types of goods, especially those that are organic or susceptible to moisture, like food products, textiles, and electronics. Effective ventilation systems ensure that air can naturally move, thus helping to maintain the quality and integrity of the load. Other options do not accurately capture the primary reason for container ventilation, as aesthetics, temperature regulation in the sense of heating or cooling, and weight capacity aren't the main focus of such systems.