This high-reliability pressure switch features a 3-21" NPT mount and includes an integrated mounting bracket for secure installation within the cabinet or manifold

the contacts should be open

Is this relay suitable for fire-alarm systems

restricted airflow

Aprilaire 6203 Panel 320788-703 This high-reliability pressure switch featuresThe Aprilaire 6203 Panel is a professional grade 3 zone HVAC controller designed to provide precise climate management for residential and light commercial applications. This versatile zone control system is compatible with multistage heat pumps and conventional forced air systems, supporting up to 3 stages of heating and 2 stages of cooling. Engineered for efficiency, the Aprilaire 6203 features integrated damper control logic, ensuring optimal