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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  |
Humidistat 4258
#25

Model 445 diagram

Humidistat

Part #4258

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

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

Pump Assembly/motor Board 4009
#4

Model 445 diagram

Pump assembly/motor board

Part #4009

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

Humidistat Adapter Plate 4039

#NI

All parts diagram

Humidistat adapter plate

Part #4039

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

Bracket 4095
#17

Model 445 diagram

Bracket

Part #4095

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

Hose And Nozzle 4091
#9

Model 445 diagram

Hose and nozzle

Part #4091

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

Pump 4100
#5

Model 445 diagram

Pump

Part #4100

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

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