ensuring that the inducer motor is pulling the correct vacuum through the heat exchanger before allowing the ignition sequence to proceed

and insulation ratings match the requirements of your specific HVAC unit

This component is compatible with both fuel types

making it ideal for vacuum and low-pressure gravity-fed systems

avoid touching the coils with bare hands to prevent oils from creating hot spots that degrade the heating element assembly over time

Resideo ZD8X20TZ Damper 320788-704 ensuring that the inducer motorThe Resideo ZD8X20TZ is a heavy duty, rectangular zone damper specifically engineered for professional HVAC zoning applications. Measuring 8 inches wide by 20 inches high, this parallel blade damper is constructed with an extruded aluminum frame and blades to ensure long term structural integrity in high velocity systems. It features a high torque 24VAC synchronous motor mounted on the 20 inch side, providing a power closed spring return open