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This flue box is designed for specific 80% AFUE and mid-efficiency units
making it an essential component for monitoring boilers
and FX industrial heaters
Durable Construction: Silver alloy contacts provide superior conductivity and resistance to pitting over 50
you ensure electrical compatibility with the existing control board and transformer
Modine 5H0780340011 Pressure Switch 30067439-890 This flue box is designedThe Modine 5H0780340011 Pressure Switch is a critical safety component engineered specifically for Modine LP gas unit heaters. As the authorized replacement for the legacy 5H78034 11, this OEM switch ensures proper venting and combustion airflow before allowing the gas valve to energize. Built for low pressure gas applications, this HVAC air pressure switch features a precision calibrated set point to maintain system integrity and prevent hazardous