this panel enables a single thermostat to operate two separate systems

the unit simultaneously modulates hot and cold 1-inch inlets to provide a sensitive

ensuring responsive firing and shutdown sequences

2 Degree Differential Each Stage and 3 Degree Differential Between Stages

Aprilaire 4311 Control Electrode 320788-704 this panel enables a singleThe Aprilaire 4311 Control Electrode is a critical internal component designed for high performance steam humidifiers, specifically engineered to work seamlessly within the Aprilaire Model 800 series. This replacement electrode plays a vital role in measuring water levels and electrical conductivity within the steam cylinder, ensuring the unit operates at peak efficiency. Designed for precise HVAC humidity control, the 4311 senses when the water has