Tjernlund 950-1030 Vent System Fan ProverTjernlund 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

Upgrade your heating setup with the Reznor 257010 Pilot System Ignition Controller for dependable ignition control

This door knob kit is designed for seamless compatibility with a broad range of commercial and industrial doors

By measuring enthalpy—the combined effect of temperature and humidity—the sensor helps optimize cooling

Supports venting and condensate management for reliable furnace operation

Temperature rating: Ambient up to 165 Deg F

Tamper-resistant design

temperature up to 125°F

This slotted crankarm is sized at 1/2 inch and finished in zinc plating for corrosion resistance in demanding environments

this test spray simulates real CO exposure to verify sensor response

CK-20FV model/brand compatibility

It features a 60" capillary and a 450°F limit

Less head design for a compact