AprilAire compatibility lookup

600 / 600M / 600A Compatible Replacement Parts

AprilAire 600 Whole-House Humidifier

Confirmed fits

Part number: 35 Water Panel

AprilAire lists Water Panel 35 for 600-series whole-house humidifiers. Model suffixes usually affect controls, not the water panel family.

Before choosing replacement filters

Match the device label to 600 / 600M / 600A; series names alone can point to another part.
Compare the old part number against each confirmed fit before ordering.
Use the fit note when depth, cartridge stage, bag type, or kit contents are unclear.

Whole-house fan-powered humidifier

Cool moisture humidifier