Interactive explorer

How an Aprilaire 600M humidifier works

Tap any numbered part of this Aprilaire 600M bypass humidifier to see what it does and what you can check yourself.

Showing heating season. The damper is at WINTER and the humidifier runs whenever the furnace blower runs.

Furnace, supply plenum, bypass duct with humidifier, return duct, water line and control FURNACE supply plenum return water supply Manual control OUTSIDESET TO −20°0°+20° 15%25%35% OFF15253545 1 2 3 4 5 6 7 8

Humidifier service recommended once per year.

We service all brands. Family-owned in St. Louis since 1969.

Schedule Service 314-819-0028