What type of screens are prohibited from being installed at the termination of a dryer vent?

The prohibition of installing dryer vent screens, specifically referred to in the question, is based on safety and efficiency concerns. Dryer vents need to be free from any obstructions that might impede airflow. Installing a screen at the termination point can lead to various issues, such as lint buildup, which is highly flammable and can pose a fire hazard. Additionally, screens can restrict the necessary airflow for the dryer to operate effectively, potentially causing overheating and reduced efficiency in drying clothes.

Furthermore, proper venting practices dictate that exhaust systems should allow for unobstructed passage of air to ensure that the dryer can expel moisture effectively. This is crucial for maintaining appliance performance and ensuring safety standards are met. Other types of screens mentioned might not have the same restrictive characteristics or could be used under different circumstances, but specifically for dryer vents, maintaining an open vent with no screening is essential for safe operation.