This Service First Trane X13790845-01 SEN01521 REV A Zone Sen Set TOV Fan is a top-of-the-line HVAC sensor that will greatly improve your system's performance. With its reliable and efficient technology, this sensor is sure to meet all your needs and exceed your expectations. Designed for businesses and industrial use, this sensor is perfect for HVAC and refrigeration systems and can easily be integrated into your existing setup.