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The AO SMITH 100110799 is a motorized flue damper designed for gas-fired water heater systems. The damper controls flue gas flow by opening and closing the vent path in coordination with the burner cycle, improving thermal efficiency by reducing standby heat loss through the flue when the burner is off. Sized at 6 inches in diameter, this damper is an OEM-specified component installed by licensed plumbers and HVAC technicians during water heater service or replacement. It is built for heating applications requiring automated vent damper control.
This motorized flue damper is used on select AO SMITH BTR and BTRC model water heaters. It is suited for residential and light commercial gas water heater installations where a motorized vent damper is specified by the equipment manufacturer. The damper integrates with the water heater control system to sequence vent opening with burner operation, a requirement in energy-efficient venting configurations.
Designed for use on select AO SMITH BTR and BTRC model water heaters as specified by the manufacturer. Verify the model number and damper size against the equipment nameplate before ordering.
Installation should be performed by a licensed plumber or HVAC technician familiar with gas appliance venting requirements. Shut off gas supply and disconnect power to the water heater control circuit before removing or installing the flue damper. Verify that all vent connections are secure and that the damper actuator wiring is properly reconnected to the water heater control board before returning the unit to service. Local codes and the International Fuel Gas Code (IFGC) govern venting installation requirements.
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