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AprilAire 600 Whole-House Large Bypass Humidifier


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FREE delivery over $99

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The Aprilaire 600/600M is the ideal solution, it’s an in-duct bypass humidifier that works with your existing heating and cooling system to provide comfortably humidified air throughout every inch of your home. Functioning as an evaporative humidifier, these models evenly distribute up to 17 gallons of moisture per day. This is enough to humidify tightly sealed homes up to 4,000 square feet, average sealed homes up to 2,000 square feet, and loosely sealed homes up to 1,500 square feet.

How It Operates

Once connected to your HVAC system, the Aprilaire 600 and 600M Bypass Whole House Humidifiers humidify your home using a natural evaporation process.

  • More Humidity Needed: When the humidifier controller triggers a need for more humidity, water automatically flows from the connected water line into a distribution tray located at the top of the humidifier.
  • Moisture Creation: Water is distributed evenly across the width of this tray and directed to flow over Aprilaire’s patented Water Panel evaporator into the heart of the humidifier. Moisture from the distribution tray is then evaporated into the incoming dry air, creating comfortably humidified air.
  • Distribution: Humidified air is then distributed throughout your home through your HVAC system’s return duct and with the help of the blower.

Ideal for Larger Homes, Delivers 50% More Moisture Than The Competition

The Aprilaire Model 600 Whole House Humidifier is a great choice for larger homes that require a large humidifying capacity. The model incorporates a built-in bypass damper and right/left discharge change-over for easier installation and operation, and is equipped with a built-in drain to flush mineral build-up. As a result, water does not accumulate inside the unit, so humidified air is always fresh and clean.

These features and others are among the main reasons why the Aprilaire 600 is one of the best performing bypass humidifier on the market. You can count on it to deliver roughly 50% more moisture than the competition.

Two Aprilaire 600 Models Available

  • Model 600: Comes with a digital humidity controller that supports both automatic “set it and forget it” operation and manual humidity control.
  • Model 600M: Comes with a manual humidity controller that supports manual humidity control only. Thorough instructions and guidance for setting and adjusting an ideal humidity level using the controllers are included with each model.

Additional Benefits and Features

  • Water Panel Change Indicator – For proper humidifying throughout the season, you should replace the Water Panel twice per year. Each model includes a helpful indicator that reminds you when it’s time for a replacement.
  • Protects Your Interior – Optimally humidified air helps protect your wood floors, furnishings, and your home’s infrastructure from damage due to low humidity.
  • Relieves Dry Air Symptoms – Properly humidified air also reduces respiratory irritation triggered by low humidity and helps alleviate itchy dry skin.
  • May Reduce Energy Costs – Maintaining healthy humidified air during the colder months can actually help you feel warmer, leading to reduced heating costs.
  • Professional Installation Recommended – Aprilaire highly recommends having a qualified HVAC professional install these units.

Stop dry wintry air from undermining your comfort level and protect your loved interior with a single reliable solution – the Aprilaire 600 or 600M Whole House Humidifier!

What Customers Love

  • Set It and Forget It – Model 600 allows you to set your desired humidity level on the humidity control. The humidifier automatically maintains that level, no intervention needed.
  • Reduces Heating Costs – Healthy humidified air can help you feel warmer during the winter months and may help reduce your overall heating costs.

Things To Consider

  • Ideal Home Size – These models are designed to humidify tightly sealed homes up to 4,000 square feet, average-sealed homes up to 2.000 square feet, and loosely sealed homes up to 1,500 square feet.
  • Professional Installation Needed – Aprilaire whole house humidifiers should be installed by a qualified HVAC technician to ensure proper installation, operation, and regular maintenance.
  • AprilAire Humidifiers can help you maintain optimal humidity in your home 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.
  • Balance your humidity to preserve your home and protect its occupants from dry air issues like static shock and chapped skin.
  • Preserve your home and any contents susceptible to damage from changing humidity or dry conditions.
  • This humidifier was designed and manufactured in the USA by AprilAire—the inventor of the whole-house evaporative humidifier, and the leader in Indoor Air Quality since 1954.
  • Automatically turns on the HVAC fan to measure the relative humidity inside the ductwork and from all parts of the home. Turns on the humidifier whenever the measured humidity drops below the set point.
  • To monitor and adjust the humidity with a high-contrast digital screen.
  • For Ducted HVAC Systems.
  • For tightly constructed homes up to 5,000 square feet, with a capacity of 17 gallons per day.
    Key Specifications
    Coverage Area : 2,000 sq. ft.
    Humidifier Type : Evaporative
    HVAC Type : Bypass
    Moisture Output Per Day : 17 gallons
    Mist Output Control : No
    Water Reservoir Capacity : N/A Gallons
    Water Refill Indicator : No
    Ideal For : Whole House
    Humidifier Style : HVAC/Duct
    Humidity Range : 10% - 45%
    Humidity Display : Model 600-Auto Digital Control: Yes
    : Model 600-Manual Control: No
    Humidistat : Yes
    Running Time Before Next Refill : N/A
    Fill Type : Direct Water Line
    Controls : Model 600-Auto Digital Control: Electronic
    : Model 600-Manual Control: Manual
    Wi-Fi Capable : No
    Programmable Timer : No
    Automatic Safety Shutoff : No
    Wick Filter : Model 600-Auto Digital Control: Yes
    : Model 600-Manual Control: No
    Essential Oil Tray : No
    Color : Gray
    Maximum Noise Level : N/A dB
    California Residents : N/A
    Maximum Wattage : N/A W
    Voltage : 110-120 V
    Height : 15.75 in.
    Width : 15.375 in.
    Depth : 10.25 in.
    Weight : 9.8 lbs.
    Manufacturer's Warranty : 5-Year Limited Warranty

    No product questions available.

    • (1) Model 600 Humidifier
    • (1) Model 60 Digital Automatic Humidistat
    • (1) Model 35 Water Panel
    • (1) 24VAC Transformer
    • (1) Outdoor Temperature Sensor
    • (1) Saddle Valve
    • (1) Installation Instructions
    AprilAire 600 Whole-House Large Bypass Humidifier