Aprilaire 5529 Transformer 326070-701 By maintaining a steady signal

By maintaining a steady signal even in turbulent conditions

because the module must be able to drive the dampers to specific intermediate positions to accurately bleed air into non-calling zones

Field techs should note that modern iterations of the 611891 may feature a more compact footprint than original mechanical solenoid units

depending on local water hardness levels and aggregate peak demand

For this specific model

Aprilaire 5529 Transformer 326070-701 By maintaining a steady signalThe Aprilaire 5529 Transformer is a genuine OEM replacement component designed specifically for the Aprilaire Model 800 Steam Humidifier and Aprilaire 865 systems. This 40VA transformer is the essential power source for units featuring a fill valve inlet that extends from the bottom of the housing. By converting line voltage to a consistent 24V AC, it ensures that your whole home humidifier maintains peak electrical performance and system protection.