IAQSource.com > Articles > Aprilaire Humidifier Replacement and Plenum Opening Guide

Aprilaire Humidifier Replacement and Plenum Opening Guide

Your old Aprilaire Humidifier my be beyond repair and may need a replacement. Unfortunately, the plenum cutout for the older unit may not be exactly the same size as the opening required for the replacement.   Below, find out which model replaces your old model.  Also, see the table below for information on plenum openings.

Aprilaire Replacement Humidifier Matrix

The 700A or 700M Replaces the 110, 112, 700, 760, & 768

The 600A or 600M Replaces the 220, 224, 440, 568, & 560

The 500A replaces the 500, 550

The 400A Replaces the 445


Aprilaire Plenum Opening Sizes

MODEL

WIDTH

HEIGHT

110

13 5/8”

11 13/16”

112

19 3/8”

12 15/16”

220

10 1/8”

11”

224

15”

12 3/8”

400 / 400A*

9 ¾”

12 ½”

440

13 ¾”

11 ¼”

445

13 ¾”

11 ¼”

550 / 500 / 500A* / 500M*

9 3/8”

9 ½”

560

9 ¾”

12 ½”

568

9 ¾”

12 ½”

600 / 600A* / 600M*

9 ¾”

12 ½”

700 / 700A* / 700M*

14 7/8”

14 3/16”

760

14 7/8”

14 3/16”

768

14 7/8”

14 3/16”



 

 

 

 

 

 

 

 

* = current model