The Dreo HM735S features a massive 11-liter tank that supports up to 100 hours of runtime and an ultrasonic system delivering mist six feet high. Mantripping found the large capacity ideal for extended absences, while Tool Junkie observed rapid air quality improvements in spaces up to 700 square feet. However, the unit lacks Wi-Fi memory, requiring re-syncing after moves, and its top-fill design demands removing the entire upper section rather than offering a simple pour-in refill. It also struggles to reach optimal humidity levels like 60% in rooms near its maximum rated size. This model suits users prioritizing long runtime and smart control over convenient refills or peak performance in large areas.
Full review
100-hour runtime on a massive tank
The Dreo HM735S distinguishes itself from smaller desktop units primarily through its substantial 11-liter water reservoir, which translates to approximately 2.9 gallons of capacity. This large volume allows the device to operate for up to 100 hours on lower mist settings before requiring a refill. For individuals who travel frequently or simply prefer not to monitor their home environment daily, this extended runtime ensures that humidity levels remain consistent even when the user is away from home for several days.
Mantripping highlighted the practical advantage of this capacity, noting that it eliminates the need for frequent refills and makes the unit ideal for maintaining a comfortable indoor climate while the owner is at work or on a weekend getaway. The tank size ensures that pets and plants remain unaffected by dry air during extended absences, providing peace of mind without daily maintenance interruptions.
Six-foot mist reach covers large rooms
To manage such a large water volume, the HM735S utilizes an ultrasonic atomization system that produces ultra-fine mist capable of reaching heights of up to six feet. This powerful vertical output ensures rapid and even distribution of moisture throughout larger spaces. The manufacturer rates the unit for coverage areas up to 700 square feet, a significant footprint compared to standard bedroom humidifiers.
Tool Junkie observed that this high-velocity mist allows the unit to significantly improve air quality across entire living rooms or open-plan kitchens within just twenty to thirty minutes of operation. The strong output prevents dry spots in expansive areas, making it a viable solution for central living spaces rather than confined bedrooms.
App control and voice assistant integration
Smart functionality is central to the HM735S experience, with full remote monitoring and adjustment capabilities via the Dreo mobile application. The app allows users to set target humidity levels between 30% and 80%, adjust mist intensity across multiple settings, and schedule operation times up to twelve hours in advance. This digital control is complemented by native compatibility with Amazon Alexa and Google Assistant, enabling hands-free voice commands to turn the device on or modify humidity targets.
Wi-Fi memory loss disrupts room moves
A notable friction point in the smart ecosystem is the unit's lack of Wi-Fi memory. When the HM735S is unplugged or moved to a different location, it loses its network configuration and must be re-synced with the app from scratch. This requirement forces users to navigate the setup process repeatedly if they wish to rotate the device between rooms, undermining the convenience promised by its smart features.
Top-fill design requires partial disassembly
While the unit advertises a top-fill design for easy refilling, the actual mechanism requires removing the entire top section of the humidifier to access the water reservoir. This necessity to detach components slightly diminishes the convenience compared to true one-touch refill systems where water can be poured directly into an open basin without moving parts.
Struggles to hit peak humidity targets
Despite its powerful output and large capacity, the HM735S faces limitations in reaching optimal humidity levels in spaces that match its maximum rated coverage. Mantripping reported an inability to reach 60% relative humidity in a room sized at approximately 700 square feet, which is often considered the ideal target for comfort. The unit comfortably maintained levels above 50%, providing relief from dry air, but fell short of higher benchmarks.
Self-cleaning mode reduces maintenance burden
To combat the buildup of mold and bacteria common in humidifier tanks, the HM735S includes a dedicated self-cleaning mode. This feature helps maintain hygiene within the water reservoir without requiring constant manual scrubbing. The unit also comes with a demineralization cartridge designed to reduce white dust, further assisting in maintaining air quality and reducing the frequency of deep cleaning sessions.
Quiet operation suits sleep environments
Noise levels are kept low enough for bedroom use, with the unit operating at approximately 36 decibels during standard misting. This near-silent operation ensures that the humidifier does not disrupt sleep or interfere with television viewing, even when running on higher mist settings.
Strengths
- +11-liter (2.9-gallon) water tank provides up to 100 hours of continuous runtime on lower settings.
- +Ultrasonic technology produces ultra-fine mist that reaches heights of up to six feet for rapid distribution.
- +Smart app control allows remote monitoring and adjustment, with compatibility for Alexa and Google Assistant.
- +Built-in self-cleaning mode helps prevent mold and bacteria buildup in the water tank.
Watch-outs
- −Top-fill design requires removing the top section to add water, which diminishes convenience compared to true one-touch refills.
- −Some users report difficulty reaching optimal humidity levels (e.g., 60%) in spaces near the maximum rated coverage.
How it compares
The Dreo HM735S Humidifier significantly outperforms the Crane Adorables Humidifier in runtime, offering up to 100 hours compared to a maximum of 24 hours, making it superior for large rooms or extended absences. Like the Levoit LV600S Smart it can be controlled from an app, but its top-fill design requires removing the entire upper section to add water.
Rating sources
“it's been a game Cher this isn't just another run-of the- mil humid of fire it's packed with SM technology a massive water tank and enough power to comfortably humidify large spaces for days on end”
“both of these humidifiers are a win-win ... seriously you can't go wrong with either model”
Our 4.5 score is the average of the 1 scored review above; 2 more reviewed it without printing a score and are not in the average. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
