Instructions & Brochures

Humidifier Install Instructions - Fiberglass Duct (URL)
Aprilaire Humidifiers Brochure (pdf, 2.85 MB)
Aprilaire Humidifiers Owners Manual (pdf, 984 KB)
Aprilaire Humidifiers Spec Sheets (pdf, 57.4 KB)
Aprilaire 400-Series Installation Instructions w/Model 60 Humidistat (pdf, 1.06 MB)
Aprilaire 4655 Manual Humifier Control Safety and Installation Instructions (pdf, 177 KB)
Aprilaire Humidifier Replacement Parts List (Current Models) (pdf, 3.22 MB)

Learn More

Aprilaire Plenum Opening Sizes (URL)
Aprilaire - Product Registration (URL)