Aprilaire Model 500 Whole-House Humidifier

Get big results for small to mid-size homes with the Model 500 Whole-Home Humidifier.


The Aprilaire Model 500 Whole-House Humidifier features a built-in bypass damper and is designed for use in small to mid-size homes with automatic digital control for premium performance and convenience.

The Aprilaire Model 500 Whole-House Humidifier:

  • Installed in central heating and cooling system ductwork
  • Comes equipped with a drain to flush minerals from the unit
  • Has an evaporation capacity of 0.50 gallons per hour
  • Humidifies tightly-constructed homes up to 3,000 square feet in size

The Model 500 bypass humidifier is an economical proven performer in the extensive line of Aprilaire Humidifiers.

For some homes, a manual control may be recommended. The Aprilaire digital control can be used in manual mode while still providing vital service, temperature and relative humidity indicators.  

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