#4655 Aprilaire Manual Humidistat Review

Average Reviews:

(More customer reviews)Given its price the Aprilaire manual humidistat performs fairly well. However, it did not fit into the old humidistat opening without drilling, and it is about 2% off in its setings. This spring I will replace it with an automatic one.

Click Here to see more reviews about: #4655 Aprilaire Manual Humidistat

An increase in relative humidity expands the nylon ribbon which opens the control switch to stop operation of the humidifier. A decrease in relative humidity reverses the process and closes the control switch.

Click here for more information about #4655 Aprilaire Manual Humidistat

Aprilaire / Generalaire 4040 Humidifier Solenoid Valve Review

Average Reviews:

(More customer reviews)I'm an HVAC technician, and have replaced dozens of these. Remember to order an Aprilaire 4004 In-Line Strainer and the correct orifice for your humidifier model when you order this solenoid valve, because it doesn't come with them. If you forget the orifice, don't be surprised when water starts gushing out of the humidifier, because the orifice regulates the amount of water fed to it. The strainer goes in the long end of the solenoid fitting, and the orifice in the short end.
Aprilaire 4231 Yellow Orifice: Aprilaire models 400, 500, 550, 550A, 560, 568 & 600.
#4021 Aprilaire Red Orifice: Aprilaire models 112 & 224.
#4232 Aprilaire Blue Orifice: Aprilaire models 350, 360, 440, 700, 760, 760A & 768.
#4007 Aprilaire White Orifice: Aprilaire models 110 & 220.

Click Here to see more reviews about: Aprilaire / Generalaire 4040 Humidifier Solenoid Valve

Replacement humidifier solenoid for Aprilaire models 220, 224, 400, 440, 550, 550A, 558, 560, 560A, 568, 600, 760, 760A, 768, and 700. This valve operates on 24V. This is manufactured by Generalaire to fit Aprilaire humidifiers.

Click here for more information about Aprilaire / Generalaire 4040 Humidifier Solenoid Valve