AprilAire 620A Whole-House, Large Bypass Evaporative Humidifier
AprilAire 620A Whole-House, Large Bypass Evaporative Humidifier
18 Gallons Per Day, Water Saving with Automatic Digital Control for up to 5,300 Sq. Ft., Compatible with the AprilAire Healthy Air System
This product is available from our nationwide network of AprilAire Healthy Air Professionals









- BEST-IN-CLASS PERFORMANCE AND EFFICIENCY* – Recycles water to minimize water usage while maintaining optimal panel saturation for increased output *Vs. leading competitors' UL rated bypass humidifiers of similar size with 6" duct opening
- SUPERIOR CAPACITY – Delivers 18 gallons per day of humidification and balances humidity quicker than ever
- 55% LESS WASTEWATER* – Built with superior sustainability in mind. The innovative recirculation valve recycles water to reduce water down the drain and save up to 4,650 gallons of water per year Vs. previous AprilAire models at rated capacity for 5-month season
- SIMPLE MAINTENANCE – The one-piece disposable HydroCore™ water panel cartridge quickly pops in and out for fast replacement. Annual maintenance is now easier than ever.
- HUMIDITY FOR HEALTH – Achieve balanced humidity in the 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, viruses, fungi, and dust mites
- ADJUSTABLE DAMPER POSITIONS – New intermediate damper positions provide a simple solution to optimize air flow for high pressure systems
- EASY INSTALLATION – The distribution tray allows installation to be up to 3 degrees out of level
- LEAK PREVENTION – Designed to help prevent leaks with catch-all drain
- REVERSIBLE DESIGN – The bypass module can be reconfigured to fit tight installs and optimize performance on any furnace configuration. Easily install with the bypass on the left (standard configuration) or right (reconfigured).
- AUTOMATIC CONTROL – The included digital control provides convenient operation by automatically adjusting humidity levels based on outdoor temperature in Automatic Mode, while also offering Manual Mode for customized control. The large, blue LED backlit LCD display includes the relative humidity percentage and set point adjustments.
- PART OF THE APRILAIRE HEALTHY AIR SYSTEM – The 620A Humidifier is a part of your one-stop, all purpose investment toward a greater quality of life. The AprilAire Healthy Air System (additional components sold separately) combines fresh air ventilation, air filtration, humidity control, radon control, zoning and IAQ control, and UVC sanitization to address all aspects of Indoor Air Quality in the home.
- BUY WITH CONFIDENCE – AprilAire Whole-House Humidifiers are designed and assembled in the USA utilizing US and global components by AprilAire, the leader in Indoor Air Quality solutions for the home since 1954, and come with a 5-year warranty
*Compared to AprilAire 600 Humidifier
- Materials: Polycarbonate, Plastic
- Actual Measurements: 18H x 14.5W x 10.5D (inches)
INCLUDED IN THE BOX:
- 620 Humidifier
- 60 Automatic Digital Control
- HYDROL L HydroCore
- 4010 24VAC 10VA Transformer
- 4001 Saddle Valve
- Owner's Manual
- Installation Template

AprilAire Is Healthy Air
AprilAire is on a mission to make homes healthy. We believe everyone deserves Healthy Air and envision a future with Healthy Air in every home.
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By The Numbers
70 years of filling homes with Healthy Air! Our mission has always been to make homes healthy, creating whole-house solutions inspired by the needs of our customers.
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Invisible Pollutants
Just because you can’t see airborne allergens, doesn’t mean they’re imaginary. Put your health and home first with AprilAire whole-house solutions.
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Healthy Homes
70 years of filling homes with Healthy Air! Our mission has always been to make homes healthy, creating whole-house solutions inspired by the needs of our customers.
