AprilAire Model 500 Small Bypass Evaporative Humidifier

Whole-House Humidifier


Our duct-mounted small bypass evaporative humidifier is designed for tight homes under 3,600 square feet. The humidifier adds moisture to your home's dry air as it moves through our moisture-laden water panel to create Healthy Humidity throughout your home.


Balanced Humidity Improves Your Body's Natural Defenses

Model 500 with Automatic Digital Humidifier Control Features:




HUMIDITY FOR HEALTH: AprilAire Humidifiers can help you maintain optimal humidity in your home 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.


PROTECT YOUR HOME:  Preserve your home and any contents susceptible to damage from changing humidity or dry conditions.


HUMIDITY FOR COMFORT: Balance your humidity to reduce the incidence of dry skin, static shock, and other dry air issues.


BUY WITH CONFIDENCE: This humidifier was designed and manufactured in the U.S.A. by AprilAire—the inventor of the whole-house evaporative humidifier, and the leader in Indoor Air Quality solutions.








ONBOARD CONTROL SENSOR 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.




FULL COVERAGE For tightly constructed homes up to 3,500 square feet, with a capacity of 12 gallons per day.


CONVENIENT CONTROL To monitor and adjust the humidity with a high-contrast digital screen.







Humidity Plays a Key Role in Wellness

Benefit Icon   Health

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.

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Benefit Icon   Comfort

Whether your home is in a dry region of the country, or in an area with seasonal dryness, maintaining the right level of humidity can make all the difference in how comfortable you feel in your home.

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Benefit Icon   Preservation

Help preserve the natural beauty of wood floors, cabinetry, furnishings, and anything else in your home susceptible to warping, cracking, or other permanent damage due to dry air.

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Healthy Humidity Icon

Breathe Healthy Air, no matter when or where with the AprilAire Healthy Air Systemâ„¢. Find out how balancing your humidity benefits your health.

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Installation instructions

Saddle valve

6' power cord

Automatic Digital Humidifier Control

24V Transformer

Outdoor Temperature Sensor

#10 Water Panel


*Model 500M available with manual humidistat. Product features will differ.







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Healthy Air Professionals Who Care

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