The Lennox Y8494 – AprilAire 6108 Barometric Bypass Damper is a high-quality 8-inch automatic damper designed to regulate excess air pressure in forced-air HVAC systems. This precision-balanced bypass damper helps direct excess airflow back to the return duct, maintaining consistent system performance and protecting equipment from pressure-related strain. Ideal for zoned HVAC systems that depend on dependable static pressure control.

Crafted with durable materials and engineered for smooth operation, the AprilAire 6108 damper delivers long-term reliability with minimal maintenance. Its adjustable counterweight allows fine-tuned airflow control, making it easy to balance comfort across multiple zones.

 

Key Features:

• 8" diameter barometric bypass damper
• Automatically relieves system pressure in zoned HVAC applications
• Adjustable counterweight for precise airflow balancing
• Helps prevent air noise, blower strain, and excessive static pressure
• Durable metal construction for long-term performance
• Compatible replacement for Lennox Y8494 and AprilAire 6108