Description
The Tjernlund Products 950-0012 Prover Sensing Tube Pack of 3 is a fan prover sensing part used in venting system to verify proper draft and airflow operation in power vent assemblies in HVAC systems. It is designed for HSJ, HS1, and GPAK side-wall systems, where it transmits pressure response from the path to the control system to confirm safe combustion venting conditions. Each sensing tube is installed within the venting, or prover port to detect airflow changes and ensure the inducer fan is operating correctly before burner ignition. This helps maintain safe exhaust removal and reliable system operation in gas-fired heating equipment.
