Bard HVAC 8406-078 Pressure Switch 0.38" WC

The Bard HVAC 8406-078 Pressure Switch inspects the airflow pressure and confirms proper vent movement before allowing connected equipment to continue operating. Featuring a 0.38-inch water column pressure rating, this switch reacts to airflow changes by opening or closing an electrical circuit once the required pressure threshold is reached. Applied in furnaces, ventilation equipment, combustion assemblies, and HVAC systems, integration near the inducer or vent sections allows airflow verification during startup sequences. Accurate pressure response reduces improper ignition events and improves proper operating precautions.