New models of products get released every day as companies strive to make all their products more efficient, effective, and user-friendly. The issue with this is when you go to replace your old system, your model is no longer on the market. Tower Equipment is here to help you solve this issue with this Aprilaire Humidifier replacement guide! Below you will find a guide that shows you what new Aprilaire humidifier model replaces your old model.

Aprilaire Humidifier Replacement Guide

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

The hole in your ductwork ranges as well. Below you will find the opening sizes for every model so you can be sure you are getting the best fit/replacement. Why does the fit matter you might ask? If you do not have a good fit you could be losing efficiency in your system costing you more money in the long run. 

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Aprilaire Model Number	Width Measurement	Height Measurement
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 Automatic & 400 Manual	9 3⁄4“	12 1⁄2“
440	13 3⁄4“	11 1⁄4“
445	13 3⁄4“	11 1⁄4“
550, 500 Automatic, & 500 Manual	9 3⁄8“	9 1⁄2“
560	9 3⁄4“	12 1⁄2“
568	9 3⁄4“	12 1⁄2“
600 Automatic & 600 Manual	9 3⁄4“	12 1⁄2“
700 Automatic & 700 Manual	14 7⁄8“	14 3⁄16“
760	14 7⁄8“	14 3⁄16“
768	14 7⁄8“	14 3⁄16“

Interested in getting an Aprilaire humidifier or need a replacement for your job/home? Contact Tower Equipment’s professionals today for pricing, information, or with any questions you may have at: