Aprilaire RP-58 Humidifier Humidistat Control #58 RP58 [Kitchen]
Aprilaire #58 automatic humidifier control. For use with models: 110, 112, 220, 224, 400, 440, 445, 445A, 448, 500, 550, 558, 560, 560A, 568, 600, 700, 760, 760A and 768. The model #58 has been replaced by the model #60.