Greenheck 382993 Air Flow Switch

The Greenheck 382993 Air Flow Switch monitors airflow and changes the electrical contact status when the required air movement is detected. Installed within the ventilation or air handling equipment, an internal sensing system responds to air flow changes and transmits switching signals to connected control circuits. Coordinated communication with fans, safety controls, and operating controllers regulates equipment sequencing throughout HVAC systems. Airflow verification allows connected equipment to continue operating only after the required airflow conditions are established, supporting controlled startup and system protection.