Kill Germs, Bacteria, Fungus and Viruses

Remove Odors Inside Your Home

24 square foot, 3500 square inch titanium dioxide Ti02 anatase semi-conductor

Less than 0.02 QuartzCoat® durability

High output temperature compensating (HOTC)

Less than 0.20 QuartzCoat® durability

Power cord disconnect (appliance coupler design)

Make Blower Control Isolation Easy

Great for Humidifier

Integrated Smart Monitoring Drain Pump Assembly

Self Contained Immersed Electrode Design

Disposable Steam Generating Cylinder

High Water Level and Foam Detection Monitoring

Drain Tempering

Integrated AHU Fan Relay for on Demand Humidification

LCD Display with Numerical and Icon Driven Menu

Constant Control Monitoring and Diagnostics

Pure Sterile Steam Delivering Premium Indoor Air Quality

20 Percent Adjustable Capacity from Rated Max Output

Makes Blower Control Isolation Easy, Great for Electronic Air Cleaners and Small Load Rated Fan

Feed Tube and Nozzle is the Water Feed Tube Inside the Humidifier, Which Connects the Solenoid Valve and Then to the Nozzle at the Top of the Unit, Which Connects to the Distribution Tray

Aprilaire 4231 yellow orifices are the tiny nylon components which, accurately meter the flow of water into your humidifier

They allow a specific amount of water to go into the humidifier, unique to your model humidifier

Used in Models 400, 400A, 400M, 500, 500A, 500M, 550, 550A, 558, 560, 560A, 568, 600, 600A and 600M