FULL COVERAGE up to 3,000 square foot in tightly built homes with a capacity of 12 gallons per day

AUTOMATIC HUMIDIFIER with dual sensors to monitor and respond to both outdoor temperature and indoor relative humidity to deliver optimum humidity 24/7 throughout the home-simply set it and forget it

CONVENIENT DIGITAL CONTROL shows percent humidity, lights indicate humidifier is running, when to change the water panel, when service is needed and Blower Activation switch sets humidifier to run continually or only when the furnace runs

HUMIDITY FOR HEALTH Aprilaire Humidifiers can help you maintain optimal humidity in your home of 30%-60% which has been shown to reduce the incidence of respiratory infections and symptoms related to allergies and asthma by minimizing the formation of bacteria and viruses, fungi and dust mites

Made in USA

CONSERVES WATER using a unique evaporation process that also eliminates the need for a floor drain

FULL COVERAGE up to 4,000 square foot in tightly built homes with a capacity of 17 gallons per day

AUTOMATIC HUMIDIFIER with dual sensors to monitor and respond to both outdoor temperature and indoor relative humidity to deliver optimum humidity 24/7 throughout the home-simply set it and forget it

CONVENIENT DIGITAL CONTROL shows percent humidity, lights indicate humidifier is running, when to change the water panel, when service is needed and Blower Activation switch sets humidifier to run continually or only when the furnace runs

Made in USA

Full Coverage up to 3000 Square Feet in Tightly Built Homes with a Capacity of 12 Gallons per Day

Automatic Humidifier with Dual Sensors to Monitor and Respond to Both Outdoor Temperature and Indoor Relative Humidity to Deliver Optimum Humidity 24/7 Throughout the Home Simply Set it and Forget it

Convenient Digital Control Shows Percent Humidity, Lights Indicate Humidifier is Running, When to Change the Water Panel, When Service is Needed, and Blower Activation Switch Sets Humidifier to Run Continually, or Only when the Furnace Runs

Humidity for Health Aprilaire Humidifiers can Help You Maintain Optimal Humidity in your Home of 35 to 45 Percent which has Been Shown to Reduce the Incidence of Respiratory Infections and Symptoms Related to Allergies and Asthma by Minimizing the Formation of Bacteria and Viruses, Fungi, and Dust Mites

In Addition, You will Feel More Comfortable while also Preserving items in your Home Susceptible to Damage from Changing Humidity or Dry Conditions

Made in USA

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