Products
Tested using Methodology v1.0
Updated Oct 26, 2026 02:28 PM
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Tested using Methodology v1.0
Updated Oct 26, 2026 02:05 PM
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Amazon
Type
Evaporative
Mist Temperature
Cool
Runtime
11 hrs
Humidistat
Yes
Type
Ultrasonic
Mist Temperature
Cool
Runtime
43 hrs
Humidistat
Yes
Our Verdict
Blueair InvisibleMist
Dreo Smart Humidifier 747S
The Blueair InvisibleMist provides a slightly more pleasant user experience than the Dreo Smart Humidifier 747S. The Blueair is much easier to clean, has a far more compact design, and provides comparable humidification capacity and efficiency, thanks to its evaporative design. Meanwhile, the Dreo is a purely ultrasonic model that runs quieter, and its large water tank gives it a considerably longer runtime.
Variants
- InvisibleMist (White)
- Smart Humidifier 747S (Grey)
- Smart Humidifier 747S (White)
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White
InvisibleMist
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Amazon
White
Smart Humidifier 747S
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Amazon
White
InvisibleMist
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Blueair
Grey
Smart Humidifier 747S
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Amazon
White
InvisibleMist
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White
InvisibleMist
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InvisibleMist
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InvisibleMist
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InvisibleMist
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White
InvisibleMist
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Main Differences for
Home
Home
Threshold
Home
7.5
7.3
Cleaning
7.5
5.0
Runtime
5.4
9.7
Noise
8.5
9.7
Full Comparison
Design
Size
8.4
7.4
Device Dimensions
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Height
38 cm (15.0")
81 cm (31.9")
Width
24 cm (9.3")
25 cm (9.6")
Depth
24 cm (9.3")
25 cm (9.8")
Power Cord Length
1.85 m (6.1 ft)
1.50 m (4.9 ft)
Cleaning
7.5
5.0
Parts
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Cleaning
Dishwasher Safe
No
No
Features
Controls
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Compare High-Res
Type
Evaporative
Ultrasonic
Mist Temperature
Cool
Cool
Humidistat
Yes
Yes
Water Sterilization
No
No
Essential Oil Compatible
No
Yes
Auto-Off
Yes
Yes
Smartphone App
Yes
Yes
Runtime
5.4
9.7
Tank
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Compare High-Res
Tank Refill Type
Top Fill
Top Fill
Tank Usable Capacity
3.0 L (0.8 gal)
10.6 L (2.8 gal)
Runtime
11 hrs
43 hrs
Performance
Humidification Capacity
7.8
7.8
Tested Humidification
Preview Graph
Preview Graph
Time From 30% To 60%
52 min
51 min
Advertised Coverage
500ft²
700ft²
Water Emitted By The Humidifier
214 ml (7.2 oz)
210 ml (7.1 oz)
Water Evaporated By The Environment
164 ml (5.5 oz)
164 ml (5.6 oz)
Tested Humidification Capacity
6.0 LPD
5.8 LPD
Humidifier Efficiency
8.5
7.7
Humidifier Energy Consumption
6 Wh
22 Wh
Humidifier Efficiency
26.5L/kWh
7.5L/kWh
Overall Efficiency
8.5
8.4
Tested Efficiency
Preview Graph
Preview Graph
Energy Required For Evaporation
103 Wh
103 Wh
Overall Energy Required
109 Wh
125 Wh
Overall Efficiency
1.5L/kWh
1.3L/kWh
Noise
8.5
9.7
Noise Levels
Noise @ Highest Setting
41.5dBA
32.9dBA
Noise @ Lowest Setting
31.9dBA
31.0dBA
Check Price
White
InvisibleMist
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Amazon
White
Smart Humidifier 747S
SEE PRICE
Amazon
White
InvisibleMist
SEE PRICE
Blueair
Grey
Smart Humidifier 747S
SEE PRICE
Amazon
White
InvisibleMist
SEARCH
Walmart.com
White
InvisibleMist
SEARCH
Lowes.com
White
InvisibleMist
SEARCH
HomeDepot.com
White
InvisibleMist
SEARCH
BestBuy.com
White
InvisibleMist
SEARCH
B&H
White
InvisibleMist
SEARCH
Staples.com
Blueair InvisibleMist
Dreo Smart Humidifier 747S
Comments
Blueair InvisibleMist vs Dreo Smart Humidifier 747S: Main Discussion
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