021-876

This high-capacity Air Pressure Switch is a critical safety and operational component designed for heavy-duty HVAC and commercial ventilation systems. Functioning as an air proving switch, it monitors pressure differentials to ensure proper airflow is maintained before allowing equipment to engage. Built for reliability, this Single Pole Double Throw (SPDT) switch acts as an essential interlock, preventing system operation during fan or blower failure. It is an ideal replacement part for industrial air handlers, rooftop units, and large-scale ventilation systems requiring high-voltage and high-amperage capacity. By ensuring consistent air monitoring, this switch helps maintain system efficiency and prevents equipment damage due to inadequate ventilation.
Type: Air Pressure Switch / Air Proving Switch
Size: Compact
Application: Used in commercial HVAC systems, air handling units, industrial ventilation equipment, and rooftop heating/cooling units to verify airflow and manage system safety cycles.
Specifications: Configuration: SPDT (Single Pole Double Throw); Rating: 25 Amps at 277V; Function: Pressure-sensing air proving switch.