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Aprilaire
Humidifier

Model # 445 Official Aprilaire humidifier

Here are the diagrams and repair parts for Official Aprilaire 445 humidifier, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 27 parts  |
Wick Pad 12
#11

Model 445 diagram

Wick pad

Part #12

The manufacturer no longer makes this part, and there's no substitute part

Valve Sadd 4001
#1

Model 445 diagram

Valve sadd

Part #4001

The manufacturer no longer makes this part, and there's no substitute part

Humidistat 4258
#25

Model 445 diagram

Humidistat

Part #4258

The manufacturer no longer makes this part, and there's no substitute part

Scale Control Insert (12) 4080
#12

Model 445 diagram

Scale control insert (12)

Part #4080

The manufacturer no longer makes this part, and there's no substitute part

Cover-top 4162
#22

Model 445 diagram

Cover-top

Part #4162

The manufacturer no longer makes this part, and there's no substitute part

Humidistat 4016
#20

Model 445 diagram

Humidistat

Part #4016

The manufacturer no longer makes this part, and there's no substitute part

Float, Float Valve Body And Arm 4087
#2

Model 445 diagram

Float, float valve body and arm

Part #4087

The manufacturer no longer makes this part, and there's no substitute part

Fan Blade 4090
#8

Model 445 diagram

Fan blade

Part #4090

The manufacturer no longer makes this part, and there's no substitute part

Water Distribution Tray 4081
#10

Model 445 diagram

Water distribution tray

Part #4081

The manufacturer no longer makes this part, and there's no substitute part

Cord-power 4261
#18

Model 445 diagram

Cord-power

Part #4261

The manufacturer no longer makes this part, and there's no substitute part

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Repair difficulty
Time required
 15 minutes or less

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