or a failing thermopile that is dropping below the required voltage threshold

Designed specifically for cycling applications

you preserve system balance

If your application requires a 2-10 VDC or 4-20 mA signal

this assembly facilitates the necessary negative pressure required for the heat exchanger to function at peak efficiency

Tjernlund Products VP-3F Vent System 320074-702 or a failing thermopile thatThe Tjernlund VP 3F is a high performance side wall vent system designed for gas fired appliances with category I draft hoods or induced draft fan systems. Engineered to provide mechanical draft where natural drafting is obstructed or impossible, this power venter integrates a heavy duty motor and balanced blower wheel to ensure consistent flue gas extraction. The unit features pressure sensing technology to verify airflow before allowing the burner