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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
Since this is a conventional 4-wire device
Spring Return Fail-Safe: Mechanical spring ensures the valve returns to the normally closed position upon loss of 24V power
It functions as a critical safety limit
High-Torque Reliability: Unique seat geometry reduces operating friction by 20-40% for easier manual operation
Burnham Boiler 8116325 Vent Damper R-410A Since this is a conventionalThe Burnham Boiler 8116325 Vent Damper is a mission critical 8 inch automatic vent damper designed specifically for Burnham gas fired boilers. This GVD 8BN model functions as an electromechanical safety and efficiency device, preventing heated air from escaping through the flue when the burner is off. Built for high heat environments, the vent damper assembly ensures consistent HVAC efficiency by maintaining the thermal mass within the heat exchanger.