What must not be drilled when installing a narrow ventilator?

Installing a narrow ventilator requires careful consideration regarding the structural integrity of the container. When the direction is to avoid drilling holes, it emphasizes the importance of maintaining the container's strength and preventing potential leaks or damage. Drilling into the container could compromise its ability to withstand external forces, affecting its overall durability and functionality.

The absence of any drilled holes ensures that the container remains watertight and structurally sound, which is critical in preserving the safety of cargo and maintaining the container's lifespan. This approach aligns with best practices in container maintenance and integrity management, highlighting the need to utilize alternative means of ventilation that do not require modifying the container itself.