Flue gas safety device

The Bosch flue gas safety device (part number 87072064450) is a replacement safety sensor for gas-fired appliances that detects inadequate flue evacuation and initiates automatic shutdown to prevent combustion-gas release. As a field-replaceable spare for service technicians, it provides a compact electrically integrated interlock that monitors draft/vent conditions, simplifying maintenance and supporting appliance safety controls compliance. Exact match for 87072064450 was not located in Bosch North America public listings; description derived from Bosch spare-parts and installation documentation. (bosch-homecomfort.com)