Johnson Controls W42AA-1 Humidistat 322838-754 Engineered Compatibility: Exact dimensional match

Engineered Compatibility: Exact dimensional match for the Hankison 125 CFM series

Durable Construction: Built for high-frequency cycling in demanding industrial and commercial HVACR applications

this board protects expensive downstream components like the compressor from premature failure due to improper staging or rapid power fluctuations

more controlled ignition by gradually increasing the gas flow

Check the identification tag on the existing valve or the stamping on the cage

Johnson Controls W42AA-1 Humidistat 322838-754 Engineered Compatibility: Exact dimensional matchThe Johnson Controls W42AA 1 Humidistat is a heavy duty, 3 wire humidity controller designed for precision management of both humidifying and dehumidifying equipment. Engineered with a stable 150 strand human hair sensing element, this unit provides superior sensitivity and long term accuracy compared to synthetic alternatives. It operates on line voltage (120 240 VAC) or low voltage circuits, utilizing a Single Pole Double Throw (SPDT) snap acting