Slant Fin 412-706-200 Vent Damper

The Slant Fin 412-706-200 Vent Damper is a 6-inch automatic vent damper engineered to enhance the efficiency of gas-fired boiler systems. This heavy-duty 6" flue damper utilizes a motorized drive system to shut the stack during burner off-cycles, effectively trapping residual heat within the heat exchanger. Specifically designed for Slant Fin boiler models like the Galaxy and Sentinel series, it eliminates the convective heat loss that typically occurs through the draft hood when the system is idle. This replacement vent damper is equipped with a direct-drive motor, eliminating complex linkages that common failure points in field-installed components. The included damper wiring harness facilitates a secure connection to the 24V safety control circuit, ensuring the vane is fully open before ignition. By maintaining a 6-inch flue diameter and high-quality galvanized steel construction, this 412-706-200 model optimizes HVAC energy efficiency while meeting CSA certification standards for retrofit and OEM applications.

• Prevents standby heat loss by sealing the flue when the burner is inactive.
• Minimizes fuel consumption and reduces utility costs for gas-fired boilers.
• Direct-drive motor execution reduces maintenance by eliminating mechanical linkages.
• Safety-interlocked 24V circuit ensures the burner cannot fire until the vane is in a safe, open position.
• Durable galvanized steel construction provides resistance to corrosion and high-temperature stack gases.

Is the wiring harness included with the 412-706-200?
Yes, this model comes with a dedicated harness featuring a Molex-style connector for direct integration into compatible Slant Fin boiler control boards.

What happens if the damper fails to open?
The unit is integrated into the boiler safety circuit. If the internal end-switch does not detect a fully open vane, the gas valve will not be energized, preventing hazardous combustion in a blocked flue.

Can I install this on a 300,000 BTU/hr boiler?
This damper is primarily used on boilers under 300,000 BTU/hr; however, specific Galaxy models with Intermittent Pilot Ignition (IID) may require technical verification for compatibility with larger inputs.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.