Resideo by HoneyWell TrueZONE Bypass Damper Engine Harmonic Balancer

The Resideo by Honeywell TrueZONE Bypass Damper (constant pressure regulating damper, or CPRD) is a round static pressure relief damper for forced-air zoning systems. When some zone dampers close, it relieves excess static pressure. The damper opens and closes automatically to hold the desired system pressure.

Key Features:

• Round static pressure relief design for forced-air bypass applications
• Holds constant system pressure through zone changes and blower speed changes
• No weights to balance. A simple dial sets the point at which the system starts to bypass
• Calibrated spring tension regulator
• Installs at any orientation or angle
• Allows more airflow than typical weighted bypass dampers, so a smaller size can often be used
• Quick-connect regulator and flex-duct connection for easier installation and replacement

Resideo (Honeywell Home) has offered residential zoning products for decades, from panels to dampers to complete system kits. The TrueZONE bypass damper helps keep airflow balanced across zones. It also helps protect HVAC equipment from excess pressure and supports comfort and efficiency. Choose the diameter that suits your system's airflow requirements.