This product category encompasses protective devices designed to prevent avian species and other small animals from entering ventilation systems. These items are typically installed over exterior vent openings to maintain airflow while excluding unwanted pests. A common retail source for these products is a large home improvement retailer.
The implementation of these protective measures offers multiple advantages. It safeguards the functionality of ventilation systems by preventing blockages caused by nests or debris. Furthermore, it contributes to maintaining indoor air quality by reducing the potential for allergens and pathogens associated with animal intrusion. Historically, makeshift barriers were employed; however, purpose-built solutions offer enhanced durability and effectiveness.