Aprilaire 56 AutoTrac Humidistat Controller. Aprilaire duct mount low voltage electronic humidistat. Comes with outdoor air sensor. Can be retrofit installed on any humidifier with a 24 volt AC control system to make it AutoTrac style. Includes installation instructions. This system is so advanced it automatically lowers and raises the humidity setpoint as the outdoor air temperature changes.


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Manufacturer Aprilaire
Product Length 6.000
Product Width 4.200
Product Height 1.850
Product Weight 0.220
Package Length 6.550
Package Width 4.550
Package Height 2.450




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