The Trane CNT3520 SPDT Pressure Switch is a reliable, high-quality component designed to monitor and control airflow pressure in HVAC systems. With a 0.15" WC set point, it ensures accurate system performance by activating or deactivating circuits based on pressure changes. Its SPDT (Single Pole Double Throw) design provides versatile control options for various heating and cooling ap... https://www.partshnc.com/15wc-spdt-pressure-switch-5