What type of screens must exhaust openings that terminate outdoors be protected with?

Exhaust openings that terminate outdoors must be protected with corrosion-resistant screens to ensure durability and effectiveness in protecting the system from various environmental factors. Corrosion-resistant materials are essential because outdoor conditions expose screens to moisture, wind, and potential corrosive substances that can deteriorate other materials over time.

Using corrosion-resistant screens promotes longevity and maintains the integrity of the ventilation system, preventing issues such as rust or deterioration that can lead to blockages or inefficiencies in airflow. This choice is consistent with best practices in building codes, which prioritize both functionality and the maintenance of appliance performance in all weather conditions.

Other materials, such as stainless steel or plastic, may not offer the same balance of durability and performance specific to exhaust systems, while wire mesh may not adequately protect against smaller pests or debris in outdoor settings. Thus, selecting a corrosion-resistant screen aligns best with the requirements for outdoor exhaust openings.