The Blower Wheels B3/B4 are designed for both clockwise (CW) and counterclockwise (CCW) operation, making them versatile components for BROAN-NU TONE LLC ventilation systems. These high-performance blower wheels are crafted from durable materials to ensure longevity and efficiency. With precise dimensions and a lightweight design, they facilitate optimal airflow and reduce energy consumption. Ideal for replacements, these blower wheels are compatible with various models, ensuring seamless integration into your existing system. Enhance your ventilation performance with these reliable blower wheels.