The Trane IS20146-3354 Pressure Switch (also listed as SWT2521 and C341825P22) is a furnace air pressure switch designed to monitor and maintain the proper airflow within HVAC systems. Calibrated to activate at 0.94" WC (Water Column), this switch ensures your furnace operates safely and efficiently by confirming draft inducer performance before ignition. Key Features Accurate pressure sensing at 0.94" WC Ensures safe furnace ignition by verifying airflow Compatible with a range of Trane heating systems High-quality construction for long-term reliability Designed for easy installation and replacement Specifications Part Numbers: IS20146-3354, SWT2521, C341825P22 Type: Pressure Switch for furnace systems Setpoint: 0.94" WC Function: Airflow verification before ignition Application: Gas furnaces and heating units Compatible Models Widely used in Trane gas furnaces that require a 0.94" WC pressure setting. (Model-specific compatibility available on request) Why Choose This Item The Trane IS20146-3354 pressure switch offers reliable safety assurance by preventing furnace operation under inadequate airflow conditions. With factory-calibrated performance, this OEM part delivers peace of mind, durability, and compatibility with Trane systems ? a must-have for professional HVAC maintenance and repair.