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You are looking at the aprilaire 600m whole house humidifier vs 500 whole house humidifier. Both units are made in the USA and help maintain healthy indoor air. They share the same white finish and whole-house application. The main difference lies in their output and control. The 600M offers higher capacity and manual settings. The 500 provides automatic adjustment with a digital display. Your choice depends on home size and desired control level.
Coverage Area
Up to 5,000 sq. ft.
Up to 3,600 sq. ft.
Daily Capacity
17 gallons per day
12 gallons per day
Control Method
Manual with single sensor
Automatic with dual sensors
Display
Not listed
Digital control panel
Dimensions (H x W x L)
15.8 x 15.4 x 10.3 inches
13 x 10.3 x 15.6 inches
Choose the first if
- You have a large home up to 5,000 square feet.
- You prefer to manually set humidity levels using a single sensor.
- You need the highest available water output capacity.
Choose the second if
- Your home is under 3,600 square feet.
- You want automatic humidity adjustment based on outdoor temperature.
- You prefer a digital display with service indicators.
Verdict
Choose the 600M if you need maximum coverage and manual control. Pick the 500 if you want automated convenience and a smaller footprint. Both models deliver the same core AprilAire reliability.
600M vs 500 Humidifier Specs
Coverage area
Edge: AprilAire 600M Whole-House Humidifier
The AprilAire 600M covers up to 5,000 square feet in tightly built homes. It produces 17 gallons of moisture daily. This higher output suits larger spaces or homes with significant air leakage. The AprilAire 500 covers up to 3,600 square feet. It outputs 12 gallons per day. You should choose the 600M if your home exceeds 3,600 square feet. The 500 works well for smaller or moderately sized residences. Check your home's square footage and insulation quality. Tightly built homes retain humidity better, allowing smaller units to perform effectively. Larger homes often need the extra capacity of the 600M to maintain consistent comfort levels throughout the winter months.
Control method
Edge: AprilAire 500 Whole-House Humidifier
The AprilAire 600M uses manual control. It has a single sensor that monitors indoor relative humidity. You set the desired percent humidity manually. This requires you to adjust the setting as seasons change. The AprilAire 500 features automatic control with dual sensors. It monitors both outdoor temperature and indoor humidity. This allows it to adjust output automatically throughout the day. You simply set the target and let the unit manage the rest. If you prefer a set-and-forget experience, the 500 is better. If you like manual adjustments, the 600M fits your style.
Digital display
Edge: AprilAire 500 Whole-House Humidifier
The AprilAire 500 includes a digital control panel. It shows the current percent humidity. Indicator lights tell you when the unit is running. It also signals when to change the water panel and when service is needed. A blower activation switch lets you choose continuous or furnace-synced operation. The AprilAire 600M does not list a digital display or control panel in its specifications. It relies on manual adjustment. The 500 provides more visual feedback and operational options. This makes monitoring and maintenance easier for many users. The 600M lacks these digital features entirely.
Physical dimensions
Edge: Tie
The AprilAire 600M measures 15.4 inches wide, 15.8 inches high, and 10.3 inches long. It weighs 8.7 pounds. The AprilAire 500 measures 10.3 inches wide, 13 inches high, and 15.6 inches long. It weighs 7.75 pounds. The 600M is wider and taller but shorter in depth. The 500 is narrower and shorter but deeper. Consider your furnace compartment space. The 600M has a larger footprint in width and height. The 500 extends further in length. Both are white. Choose the model that fits your available installation space without obstruction.
Daily capacity
Edge: AprilAire 600M Whole-House Humidifier
The AprilAire 600M has a daily capacity of 17 gallons. This higher output supports larger homes or drier climates. The AprilAire 500 has a daily capacity of 12 gallons. This is sufficient for homes up to 3,600 square feet. Higher capacity means the unit can add moisture faster. This is useful in very dry conditions or large open spaces. The 600M handles heavier loads. The 500 is adequate for standard residential needs. Your choice depends on your home size and local climate. Match the capacity to your specific humidity requirements.
Choose Your Aprilaire Model
Large home owner needing high output
Our pick: AprilAire 600M Whole-House Humidifier
The AprilAire 600M delivers 17 gallons of moisture daily. It covers up to 5,000 square feet in tightly built homes. This higher capacity handles larger spaces or homes with significant air leakage. You get robust humidity control for bigger footprints without compromising on performance or coverage area.
User wanting automatic climate adjustment
Our pick: AprilAire 500 Whole-House Humidifier
The AprilAire 500 features an automatic control system with dual sensors. It monitors both outdoor temperature and indoor relative humidity to adjust output 24/7. The digital display shows status and service needs. You simply set it and forget it, ensuring consistent comfort without manual intervention or guesswork.
Small home owner seeking compact size
Our pick: AprilAire 500 Whole-House Humidifier
The AprilAire 500 is physically smaller and lighter. It measures 10.3 inches wide, 13 inches high, and weighs 7.75 pounds. It covers up to 3,600 square feet with 12 gallons of daily output. This compact design fits easily into tighter HVAC spaces while still providing adequate whole-house humidity for smaller residences.
AprilAire 600M Whole-House Humidifier
Best for: large homes needing high manual output
- Coverage Area
- Up to 5,000 square feet
- Moisture Output
- 17 gallons per day
- Humidifier Type
- Evaporative
- Control Method
- Manual
- Features
- Humidifier
- Room Type
- Whole House
The AprilAire 600M is a manual whole-house humidifier designed for homes up to 5,000 square feet. It delivers 17 gallons of moisture per day to maintain indoor humidity between 40% and 60%. This model uses a single built-in sensor for manual adjustment rather than automatic control. It fits tightly built homes and helps reduce respiratory irritants. The unit measures 15.4 by 10.3 by 15.8 inches and weighs 8.7 pounds.
- Covers up to 5,000 square feet
- Produces 17 gallons of humidity daily
- Built-in sensor for manual humidity control
- Designed and manufactured in the USA
- Manual control requires you to adjust settings
- Heavier build at 8.7 pounds
- Smaller capacity than automatic models
- You want high output for large homes
- You prefer manual humidity adjustments
- You need coverage up to 5,000 square feet
- You require automatic humidity control
- You have a home larger than 5,000 square feet
- You want a lighter installation unit
Verdict: AprilAire 600M 17 GPD Manual Humidifier suits homeowners who need high moisture output for large spaces and do not mind manual adjustments. It is a solid choice for tightly built homes up to 5,000 square feet.
AprilAire 500 Whole-House Humidifier
Best for: homes up to 3,600 square feet
- Coverage Area
- Up to 3,600 square feet
- Moisture Output
- 12 gallons per day
- Humidifier Type
- Evaporative
- Control Method
- Automatic Digital
- Features
- Humidifier
- Room Type
- Whole House
The AprilAire 500 is an automatic whole-house humidifier designed for homes up to 3,600 square feet. It delivers 12 gallons of moisture daily. Dual sensors monitor outdoor temperature and indoor humidity to maintain comfort. The digital control panel displays humidity levels and service needs. It measures 10.3 by 13 by 15.6 inches and weighs 7.75 pounds. This model suits homeowners seeking reliable, automated humidity control.
- Covers up to 3,600 square feet
- 12 gallons per day capacity
- Dual sensors for automatic adjustment
- Digital control panel with indicators
- Lower coverage area than the AprilAire 600M
- Heavier build at 7.75 pounds
- Manual control interface without app connectivity
- You own a home under 3,600 square feet
- You want automatic humidity regulation
- You prefer a digital display for monitoring
- You need coverage for larger homes
- You require smart app integration
- You prefer a lighter unit
Verdict: The AprilAire 500 Whole-House Humidifier fits smaller homes needing reliable, automatic moisture control. It is a solid choice for buyers prioritizing capacity and digital monitoring over smart features.
Specifications side by side
| Spec | AprilAire 600M Whole-House Humidifier | AprilAire 500 Whole-House Humidifier |
|---|---|---|
| Coverage Area | Up to 5,000 square feet | Up to 3,600 square feet |
| Moisture Output | 17 gallons per day | 12 gallons per day |
| Humidifier Type | Evaporative | Evaporative |
| Control Method | Manual | Automatic Digital |
| Features | Humidifier | Humidifier |
| Room Type | Whole House | Whole House |
| Color | White | White |
| Dimensions | 10.3 × 15.4 × 15.8 inches | 15.6 × 10.3 × 13 inches |
| Weight | 8.7 pounds | 7.75 pounds |
| Size | 1700-5000 sq. ft. | 3,000 sq. ft |
| Model | 600M | 500 |
Frequently asked questions
Is the AprilAire 600M better than the 500 for large homes?
Yes, if your space exceeds 3,600 square feet. The 600M covers up to 5,000 square feet in tightly built homes. It produces 17 gallons of moisture daily. This higher output handles larger areas or homes with significant air leakage. The 500 maxes out at 3,000 square feet. Choose the 600M for bigger footprints.
Does the AprilAire 500 have automatic controls?
The provided data does not specify control types for the 500. It lists it as a whole-house humidifier with white coloring. The 600M is described as a manual unit. You should check the manual for the 500 to confirm if it includes automatic sensors or requires manual adjustment for humidity levels.
What are the dimensions of the AprilAire 600M?
The 600M measures 15.4 inches in width, 15.8 inches in height, and 10.3 inches in length. It weighs 8.7 pounds. These dimensions allow it to fit in standard utility spaces. The compact footprint helps it blend into mechanical rooms without taking up excessive floor or wall space.
How much does the AprilAire 500 weigh?
The AprilAire 500 weighs 7.75 pounds. It is slightly lighter than the 600M model. The 500 measures 10.3 inches wide, 13 inches high, and 15.6 inches long. Its weight makes it easy to handle during installation or maintenance tasks in your home.
Can the AprilAire 600M be used in small apartments?
The 600M is designed for homes up to 5,000 square feet. It may be overpowered for small apartments. The 500 covers up to 3,000 square feet. Both units are whole-house systems. For smaller spaces, a portable unit might be more appropriate than a whole-house model like the 600M.
What color are these AprilAire humidifiers?
Both the AprilAire 600M and the 500 are white. They share the same white finish. This neutral color helps them blend into most utility rooms or basements. The consistent color scheme ensures they look uniform if you install multiple units or compare them side by side.
Is the AprilAire 600M suitable for tightly built homes?
Yes, the 600M is explicitly suited for tightly built homes up to 5,000 square feet. Its 17-gallon daily output ensures adequate moisture without over-humidifying sealed spaces. The 500 covers smaller areas. If your home is well-sealed and large, the 600M provides the necessary capacity for comfort.
Which model is better for homes with air leakage?
The AprilAire 600M is better for homes with significant air leakage. Its higher capacity handles larger spaces and moisture loss due to drafts. The 500 covers up to 3,000 square feet. If your home loses moisture quickly, the 600M’s 17-gallon output maintains levels more effectively than the smaller model.