The OBE1267 Permanent Filter is a high-efficiency filtration solution for Broan-Nu Tone ventilation systems. Designed to capture dust, allergens, and other airborne particles, this filter is made from durable materials that ensure long-lasting performance. Its dimensions are specifically tailored to fit Broan models, providing a perfect fit for optimal airflow. This permanent filter is washable and reusable, making it an eco-friendly choice for maintaining indoor air quality. Regular cleaning is recommended to ensure the filter operates effectively, contributing to a healthier living environment.