it is the standard specification for several Nordyne-manufactured brands

This harness is designed for several Lennox furnace models

connecting the furnace flue outlet to the exterior venting assembly

The Lennox 16U10 Collector Box (also known by part number 619598-10) is a critical OEM replacement cold end header box kit designed for high-efficiency Lennox condensing furnaces

Siemens Building Technology 535-741-4 Sensor 30067439-890 it is the standard specificationThe Siemens Building Technology 535 741 4 Sensor is a professional grade duct temperature sensor designed for integration into commercial and industrial HVAC control systems. Utilizing a high precision 100k Ohm thermistor (NTC Type II), this unit provides an accurate resistance based output signal to track air temperature fluctuations within air handling units or supply return ductwork. The 4 inch rigid probe is constructed from durable materials to