Weil McLain 381-800-445 - 381-800-445 Vent Damper, 9" Diameter, with Wire Harness

Efficiently manage your hydronic heating system's exhaust flow with the Weil-McLain 381-800-445 9-inch vent damper. Engineered for precise airflow regulation, this component features a factory-integrated wire harness, allowing for seamless electrical connection to your existing boiler controls and reducing onsite installation time. The 381-800-445 ensures consistent system operation by modulating the flue gas path to maintain optimal stack temperatures during burner cycles.

This automatic damper functions as an electro-mechanical gate that closes the vent pipe during burner standby, preventing the loss of conditioned room air and heat through the chimney. When the thermostat calls for heat, the actuator receives a signal to open the damper, providing a clear path for combustion gases to exit safely before the ignition sequence initiates.

Key System Performance Baselines:

• Precision Flow Control: Engineered to provide a 9-inch diameter clearance for efficient stack venting.
• Seamless Integration: Includes a dedicated wire harness for quick-connect electrical compatibility.
• Robust Construction: Built from heavy-duty, heat-resistant materials designed for long-term endurance.
• Energy Efficiency: Helps minimize standby heat loss by sealing the vent passage between firing cycles.

⚠️ Application Profile: Specifically designed for industrial and commercial hydronic heating systems, ventilation ducting, and authorized Weil-McLain boiler flue exhaust configurations.

📋 Procurement & Shipping Notice

• LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
• Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?

👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.