Tjernlund Products 950-0010 Shaft Extension R-22 as this switch is calibrated

as this switch is calibrated to respond to minute fluctuations in static pressure

For technicians working with 3-inch PVC venting

Ensure the rocker is correctly aligned with the float mechanism roller during seat-in to prevent mechanical binding

allow the unit to fire without proper airflow

verify your specific burner requirements for duty cycle and mA ratings before installation

Tjernlund Products 950-0010 Shaft Extension R-22 as this switch is calibratedAs a veteran tech, you know that keeping a Tjernlund HS4 Power Venter running at peak performance requires exact tolerances, and the Tjernlund Products 950 0010 Shaft Extension is the critical mechanical link for that assembly. Engineered specifically for the HS4 series, this OEM shaft extension kit is designed to facilitate the necessary reach between the drive motor and the blower wheel, ensuring the centrifugal fan maintains high static pressure