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Need to replace your Aprilaire humidifier but not sure which humidifier replaces your old one? Look below for information to help you decide which humidifier is best to replace your current model.

 

New Aprilaire Replacement Models Old Aprilaire Models
700 Automatic / 700 Manual 110, 112, 700, 760, and 768
600 Automatic / 600 Manual 220, 224, 440, 568, & 560
500 Automatic 500 & 550
400 Automatic 445

 

Another deciding factor in the replacement process is whether or not the size of the hole left in the duct work will be the same size needed by your new humidifier. Below are the sizes of the plenum (or hole left in your duct work) so you can compare your old model and replacement model and confirm if you need to install a new hole in your ductwork and patch up the old one.

Aprilaire Model Number Width Measurement Height Measurement
110 13 58" 11 1316"
112 19 38" 12 1516"
220 10 18" 11"
224 15" 12 38"
400 Automatic & 400 Manual 9 34" 12 12"
440 13 34" 11 14"
445 13 34" 11 14"
550, 500 Automatic, & 500 Manual 9 38" 9 12"
560 9 34" 12 12"
568 9 34" 12 12"
600 Automatic & 600 Manual 9 34" 12 12"
700 Automatic & 700 Manual 14 78" 14 316"
760 14 78" 14 316"
768 14 78" 14 316"
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