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The IO HVAC CONTROLS D-04-PO is a 4" round fresh air damper with a 24V powered open/spring close actuator. This damper features galvanized steel construction and a single blade design. It is ready for installation in any position within a properly sized duct and is rated for duct systems less than 1.0" WC. Available in POSC or PCSO configuration.
The D-04-PO is a 4" round, 24V fresh air damper suitable for residential HVAC systems. It's designed for easy installation and reliable performance in zoning and ventilation applications.
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