Aprilaire 5558 Humidistat L99H008 Perfect for commercial and residential

Perfect for commercial and residential HVAC applications

Heavy-Duty Chain Assembly: Included 1

5P specifications for exact OEM fitment in CBX25UH air handlers

Over-application can lead to mess without improving thermal performance

With its Class B insulation and 4-pole construction

Aprilaire 5558 Humidistat L99H008 Perfect for commercial and residentialThe Aprilaire 5558 is a high performance Automatic Digital Modulating Control package engineered specifically for use with the Model 866 modulating steam humidifier. This modulating steam humidistat provides superior precision by utilizing a microcomputer based design and a proportional algorithm. Unlike standard on off controls, the 5558 delivers a 0 10VDC or 2 10VDC modulating output signal, allowing the humidifier to adjust its output based on the