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SYLVANE5
4.9
Rated 4.9 out of 5 stars
41 Reviews

Aprilaire Model 500 Small Bypass Whole House Humidifiers

SKU: ap4881  |  Model: 500M
$214.99

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Manufacturer's Warranty

5-Year Limited Warranty

What's In The Box?

  • Aprilaire Model 500 or 500M Humidifier with Built-In Bypass Damper
  • Water Panel
  • 24 VAC Transformer
  • Digital (500) or Manual Humidifier Control (500M)
  • Humidifier Control Installation Instructions
  • Self-Piercing Saddle Valve
  • Humidifier Installation Instructions
  • Owner's Manual

Description

Chronic low humidity in your home can undermine your indoor comfort and even cause costly damage to your home’s interior. Improve your comfort and protect your home during dry winter months (or year-round) when you use the Aprilaire Model 500 or 500M Whole House Humidifier.

 

This bypass humidifier works with your HVAC or furnace system to deliver comfortably humidified air throughout every room of your home. It functions like an evaporative humidifier, evenly distributing 12 gallons of moisture per day. That’s enough to humidify tightly sealed homes up to 3,000 square feet, average sealed homes up to 1,500 square feet, and loosely sealed homes up to 750 square feet. 

How It Operates

When connected to your HVAC system, the Aprilaire 500 and 500M Bypass Whole House Humidifiers moisturize your home's air using a natural evaporation process. When the humidifier controller triggers a need for more humidity, water flows from the connected water line into a distribution tray. The water flows over Aprilaire’s patented Water Panel evaporator where moisture from the distribution tray is evaporated into the incoming dry air. Humidified air is then distributed throughout your home via your HVAC system’s return duct and with the help of the blower.  

Ideal for Smaller Homes-Fewer Parts To Install

The Aprilaire Model 500 Whole House Humidifier is ideal for smaller homes, requires fewer installation parts, and needs only simple annual maintenance.

  • Bypass Damper: The model incorporates a built-in bypass damper and right/left discharge change-over for easier installation and operation.
  • Built-In Drain: It’s also equipped with a built-in drain to flush mineral build-up from the machine. Plus, no standing water inside the unit means humidified air always remains fresh and clean. Maintenance is a fast once-a-year process. 

Two Aprilaire 500 Models Available

  • Model 500: Comes with a digital humidity controller that supports both automatic “set it and forget it” operation and manual humidity control.
  • Model 500M: 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. 

Product Warranty Note: Professional installation is required. The Aprilaire parts warranty will be void if not installed by a licensed contractor. 

Summary

Put an end to dry air discomfort and protect the investment you made in your home with one solution - the Aprilaire 500 or 500M Whole House Humidifier!

What Customers Love

  • Set It and Forget It - Model 400 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 3,000 square feet, average-sealed homes up to 1,500 square feet, and loosely sealed homes up to 750 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.

Specifications

    Key Specifications

    • HVAC Type
      Bypass
    • Moisture Output Per Day (gallons)
      12.0
    • Type
      Evaporative

    General

    • Color
      Gray
    • Controls
      Manual: Manual
      Electronic: Electronic
    • Fill Type
      Direct Water Line
    • Humidifier Style
      HVAC/Duct
    • Humidity Range
      10% - 45%
    • Recommended Coverage Area (sq. ft.)
      3000
    • Recommended For
      Whole House

    Power

    • Voltage (V)
      110-120

    Dimensions

    • Depth (in.)
      10.25
    • Depth (with front cover) (in.)
      10.25
    • Height (in.)
      13.0
    • Height (with front cover) (in.)
      13.0
    • Weight (lbs.)
      7.4
    • Width (in.)
      15.625
    • Width (with front cover) (in.)
      15.625

    Additional Features

    • Additional Features
      Manual: Humidistat, Wick Filter
      Electronic: Humidistat, Humidity Display, Wick Filter

    Warranty

    • Manufacturer's Warranty
      5-Year Limited Warranty

Customer Reviews

4.9
Rated 4.9 out of 5 stars
Based on 41 reviews
Total 5 star reviews: 36 Total 4 star reviews: 4 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
98%would recommend this product
Reviews Summary
Customers say this whole-house humidifier is straightforward to install for those with basic HVAC knowledge. Many reviews mention successful DIY installations, though some note additional materials like wiring and ducting may be needed. The unit effectively maintains desired humidity levels throughout homes, with users reporting consistent performance. The automatic settings receive praise for convenience. While most find installation manageable, some suggest professional installation for those less experienced with HVAC systems. Reviews frequently highlight the unit's compact size and versatility in mounting options.
41 reviews
  • MD
    Matt D.
    Flag of United States
    Verified Buyer
    Reviewing
    Aprilaire Model 500 Small Bypass Whole House Humidifiers
    I recommend this product
    Rated 5 out of 5 stars
    9 years ago
    Works perfectly and has made this winter much more enjoyable

    The humidifier in our home was broken and the humidity was under 30%. The air was hard to breath, we woke up with dry nasal passages and the our wood floors were looking dry. Overall it was a bad experience for everyone, house included. This unit changed everything for the better. My home is 2,000 square feet and this particular unit has no problem handling all three floors. I highly recommend it. My father-in-law installed it (a handy guy) and said it ""wasn't too bad."" I'd have a pro or a handyman you know install it to avoid any hassles in the future.

  • K
    Kurt
    Flag of United States
    Verified Buyer
    Reviewing
    Aprilaire Model 500 Small Bypass Whole House Humidifiers
    I recommend this product
    Rated 5 out of 5 stars
    8 years ago
    Looked at several other brands this was the best deal

    Especially like the automatic feature it prevents constant manual adjustment

  • 3
    3564
    Flag of United States
    Verified Buyer
    Reviewing
    Aprilaire Model 500 Small Bypass Whole House Humidifiers
    I recommend this product
    Rated 5 out of 5 stars
    6 years ago
    Yes

    Excellent as advertised.

  • C
    Collette
    Flag of United States
    Verified Buyer
    Reviewing
    Aprilaire Model 500 Small Bypass Whole House Humidifiers
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    Humidifier

    I installed this unit for a friend. They had an old one that hadn't function since before they bought the house 15 years ago

  • T
    Tom
    Flag of United States
    Verified Buyer
    Reviewing
    Aprilaire Model 500 Small Bypass Whole House Humidifiers
    I recommend this product
    Rated 5 out of 5 stars
    1 year ago
    Highly recommended.

    Quiet and works well. Like the different options of set-up and ease of use.