Tjernlund 950-1030 Vent System Fan Prover

Tjernlund 950-1030 Vent System Fan Prover is a precision testing device designed for HVAC and vent-system installations. This unit is used on GPAK-JT, GPAKJ, and GPAK1 side wall vent systems, and includes a Sensing Tube Kit to support accurate airflow verification during commissioning and service.

Built for reliable, repeatable measurements, the Prover helps technicians validate airflow, static pressure, and duct integrity in practical, on-site conditions. Its compatibility with GPAK-series side wall vent systems makes it an essential tool for installers and service teams working with GPAK-JT, GPAKJ, and GPAK1 configurations. The included Sensing Tube Kit simplifies connections, reduces setup time, and enhances measurement stability across varied duct layouts.

• Compatible with GPAK-JT, GPAKJ and GPAK1 side wall vent systems
• Includes Sensing Tube Kit
• Vent System Fan Prover for accurate airflow checks
• Durable, field-ready design
• Ideal for commissioning, troubleshooting, and service checks

Enhance quality control and ensure proper vent performance with this proven Tjernlund prover.