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Aprilaire 500M Bypass Humidifier (Manual Control)

Aprilaire 500M Bypass Humidifier (Manual Control)

Aprilaire 500M Bypass Humidifier (Manual Control)

Availability: In stock


Quick Overview

Aprilaire 500M Bypass Whole House Humidifier with Manual Control.


The Aprilaire 500M is easier than ever to install because it includes a built-in bypass damper, which means fewer parts to install. Plus, the damper is conveniently labeled for summer and winter settings, allowing you to set it for the entire season with no guesswork involved. This humidifier can be installed on the supply or return air ductwork. It is also left or right side reversible.


  • Utilizes a manual humidifier control
  • Installed in either your living area or 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
  • This unit has a waterfeed rate of 3.0 GPH and will deliver an evaporative rate of .5 GPH

Type: Bypass
Evaporative Capacity: 12 gal/day
Humidistat: Manual
Dimensions: 15-3/8"(W) x 13"(H) x 10-1/4"(D)
Plenum Opening: 9-1/2”(W) x 9-1/2”(H)

Furnished Materials

  • 24 VAC Transformer
  • Manual Humidifier Control (Humidistat)
  • Remote temperature sensor
  • Saddle valve
  • (1) Model 10 Water Panel
  • Humidifier installation template
  • Installation Instructions

Additional Information

Model NumberAprilaire 500M
Humidifier TypeBypass

Technical Specs

  • Dimensions: 15-3/8" (W) x 13" (H) x 10-1/4" (D)
  • Evaporative Capacity: 0.50 Gallons/Hour
  • Plenum Opening Size: 9-1/2” (W) x 9-1/2” (H)
  • Drain Connection (I.D.): .5"
  • Bypass Duct Diameter: 6"