protect downstream equipment

Direct Replacement: This Rheem-Ruud SP21032 replaces the SP11231

this 19nd-long atmospheric burner is critical for maintaining the stoichiometric balance required for clean combustion and high thermal efficiency

It is also found in brands like Broan

Johnson Controls AFS-460-DSS Sensing Switch Els PW 17895 protect downstream equipmentFor contractors managing airflow verification in sensitive HVAC systems, the Johnson Controls AFS 460 DSS Sensing Switch provides the redundancy and manual intervention required for critical safety protocols. This industrial grade air pressure sensing switch is designed to monitor positive, negative, or differential air pressure within a range of 1. 25" 0. 06" to 12" w. c. Featuring two SPST normally closed contact arrangements, this dual switch