The damper remains closed during "off cycles" to trap conditioned air inside. When the thermostat calls for heat, a motor rotates the damper 90 degrees to an open position in approximately 15 seconds, allowing flue gases to vent safely.
is a 4-inch diameter vent damper constructed from stainless steel for corrosion resistance. It is a critical safety and efficiency component for 24 VAC gas-fired heating appliances. GVD4.mp4
, a series of automatic gas vent dampers used in residential and commercial HVAC systems. These devices are designed to improve energy efficiency by preventing heat from escaping through the chimney when a gas boiler is in standby mode. Technical Overview: The GVD-4 Series The Field Controls GVD-4PL The damper remains closed during "off cycles" to