AERCO Boiler and Water Heater 27130-14 Blower Proving Switch Kit

The AERCO Boiler and Water Heater 27130-14 Blower Proving Switch Kit is a safety and verification assembly used to confirm proper airflow conditions before allowing system operation. It monitors pressure generated by the blower and sends a signal to the control circuit once adequate airflow is detected. This ensures that ignition or fuel delivery does not proceed without confirmed draft conditions. The kit includes components required for pressure sensing and connection to the blower section. In HVAC system boiler and water heating applications, it supports safe startup sequencing, controlled operation, and reliable communication between airflow monitoring and control components.