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Aprilaire 400 / 400A / 400M Humidifier Parts
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Tune Up Kit For Aprilaire Model 400, 400A, 400M Humidifiers
Tune Up Kit For Aprilaire Model 400 Series Humidifiers  [More...]
MFG#: 4788
In Stock
$72.85
Aprilaire #45 Water Panel Evaporator, 2-Pack
(case of 2 Water Panels)
Original Factory Replacement Water Panel Evaporator for Aprilaire Humidifier Model 400 humidifier  [More...]
MFG#: 45
In Stock
$25.99
(case of 2)
Suggested: $45.99
You Save: $20.00
Aprilaire #4004 In-Line Strainer
The In-Line Strainer is a small device designed to keep debris from entering the solenoid valve and should be checked annually for the build-up of minerals and grit.  [More...]
MFG#: 4004
In Stock
$4.64
Aprilaire #50 Current Sensing Relay
The Aprilaire #50 current sensing relay simplifies humidifier installation on furnaces without accessory terminals.  [More...]
MFG#: 50
In Stock
$39.82
Aprilaire #4040 Solenoid
Replacement solenoid for Aprilaire humidifier. (24 volt)
Humidifier includes inlet compression nut and washer.  [More...]
MFG#: 4040
In Stock
$54.95
Suggested: $78.40
You Save: $23.45
Aprilaire #4231 Yellow Orifice
The Yellow Orifice regulates the water flow into the humidifier.  [More...]
MFG#: 4231
In Stock
$2.30
Aprilaire #4010 Transformer
The Aprilaire 4010 Transformer converts 110 volts to 24 volts required by your humidifier.  [More...]
MFG#: 4010
In Stock
$20.48
Aprilaire #4405 Float Cover
The #4405 Float Cover keeps the two #4406 Float Assemblies in place as they rise and drop.  [More...]
MFG#: 4405
In Stock
$10.60
Aprilaire #4406 Float Assembly
These float in the #4403 Scale Control Insert & Float Chamber to control the supply of water.  [More...]
MFG#: 4406
In Stock
$5.58
Aprilaire #4335 Feed Tube with Compressor Sleeve
This is the water feed tube inside the humidifier, which connects the solenoid valve to the water distribution tray.  [More...]
MFG#: 4335
In Stock
$6.86
Aprilaire #4655 Humidistat
The Aprilaire #4655 is a low voltage humidistat designed to control humidification equipment. The 4655 replaces the older #4016 humidistat with new styling.  [More...]
MFG#: 4655
In Stock
$35.26
Suggested: $49.95
You Save: $14.69
Aprilaire #56 Humidistat
The Aprilaire Auto Trac humidifier contro: computer-equipped, completely automated, never needs manual adjustments.  [More...]
MFG#: 56
In Stock
$84.00
Aprilaire #4332 Damper Assembly for Bypass Humidifiers
Aprilaire #4332 Damper Assembly includes damper blade, spring, and knob.  [More...]
MFG#: 4332
In Stock
$21.64
Honeywell TrueIAQ Digital Humidistat, Dehumidistat, Fresh Air Control
TrueIAQ Digital IAQ Control. Integrate control of your home's humidification, dehumidification, ventilation and even bathroom fans into a single device with Honeywell's TrueIAQT Control.  [More...]
MFG#: DG115EZIAQ
In Stock
$136.59
Suggested: $241.50
You Save: $104.91
Humiditreat Scale Reducing Inline Filter for Whole House Humidifiers
Humiditreat Scale Reducing Inline Filter for Whole House Humidifiers  [More...]
MFG#: 4190-02
In Stock
$26.95
Suggested: $39.98
You Save: $13.03
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