What is a requirement for an exhaust system protecting against non-explosive fumes?

To understand the requirement for an exhaust system that protects against non-explosive fumes, it's important to recognize the role of screens with limited opening sizes. Such screens serve to prevent the entry of larger particulates and potential obstructions into the exhaust system, while still allowing gases or fumes to escape efficiently. This is especially relevant in environments where non-explosive fumes are generated, as it aids in maintaining air quality and ensures that harmful substances are effectively expelled from the space.

Limited opening sizes on screens help to facilitate proper airflow dynamics. They can mitigate the risk of back-drafting or the intrusion of contaminants that could compromise system efficiency and safety. By using screens strategically, the system can achieve optimal ventilation without allowing unwanted materials to compromise the airflow, making it an appropriate safety measure.

In contrast, the air-damper system adjusts airflow but doesn’t specifically address the entry of particulates or the prevention of large obstructions, while the Venturi effect optimizer is more related to enhancing fluid flow rather than directly filtering hazards. High-efficiency filters, while effective for particulates, are typically more relevant for air cleaning in general rather than serving as a direct mechanical barrier against openings in exhaust systems for fumes. Therefore, the requirement for screens with limited opening sizes provides