If you want the strongest warm-mist output with plant-friendly smart controls, get the Levoit OasisMist 450S; if you want the biggest tank with the best cool-mist results and maintenance guidance built into the app, get the Dreo HM713S. The OasisMist 450S pairs a 4.5-liter top-fill tank rated for 45 hours with warm and cool mist through a double-duct design, VeSync app control with an Auto Mode that holds 40 to 60 percent relative humidity, and a 26 dB quiet rating. The HM713S counters with a 6-liter tank rated for 60 hours, up to 500 mL per hour output, warm mist reaching 133 degrees Fahrenheit in 5 minutes, and a sensing algorithm that holds a set target within a 5 percent tolerance. On 09/12/2026 both Amazon US listings showed a live variant-block buy box shipping from Amazon.com and sold by Amazon.com with Add to cart and Buy Now; neither variant block showed a price line in the observed text, so confirm the current price before deciding.
Choose by your situation
| Situation | Model to consider | Main tradeoff |
|---|---|---|
| You run warm mist for fast relief, keep houseplants, and want the humidistat on one app screen with voice control | Levoit OasisMist 450S | The smaller 4.5-liter tank refills sooner than the 6-liter rival, the VeSync home screen carries marketing clutter you must switch off yourself, and warm mist raises energy use, per CNET testing. |
| You run cool mist most of the time, hate frequent refills, and want cleaning guidance plus a visible humidity readout across the room | Dreo HM713S | Its warm mist trails the Levoit in output, coverage is a shorter 1-year warranty, and warm mist still lifts the electric bill, per CNET testing. |
Two smart towers, side by side
| Criterion | Levoit OasisMist 450S | Dreo HM713S |
|---|---|---|
| Tank and runtime | 4.5 liters, top-fill in one step, rated 45 hours | 6 liters with folding carry handle, rated 60 hours |
| Mist output | Warm and cool mist, double-duct design; warm mist stated at 40 to 60 degrees Celsius; CNET measured a 14-point humidity gain in 10 minutes on warm mist through two 360-degree nozzles | Warm and cool mist up to 500 mL per hour; warm mist stated at 133 degrees Fahrenheit in 5 minutes; 40-inch MistWave plume; CNET's best cool-mist score in its lineup |
| Humidity control | VeSync app plus on-display Auto Mode holding 40 to 60 percent RH; humidistat, timer, remote and voice control listed | Set target anywhere from 30 to 90 percent with a 5 percent tolerance; humidity indicator light readable from across the room; Manual with 3 mist levels, Auto and Sleep modes |
| App and voice | VeSync app with current mode and humidity on one screen, Plant Care guidance, works with Alexa and Google | Dreo app with humidistat, scheduling, maintenance videos and a customizable cleaning reminder; works with Alexa and Google |
| Noise and extras | 26 dB quiet rating; essential-oil aroma function | Sleep Mode dims lights and lowers noise; dual-aroma pad tray for switching scents |
| Observed standing | 4.4 out of 5 stars across 63,557 ratings; Amazon's Choice; 1K+ bought in past month; CNET's top pick | 4.3 out of 5 stars across 5,399 ratings; Amazon's Choice; 100+ bought in past month; CNET's runner-up |
Levoit OasisMist 450S: the warm-mist and plant-care pick
The Levoit OasisMist 450S in White suits bedrooms where warm mist does the heavy lifting: the double-duct design pushes quicker, more even humidification, and CNET's tests gave its warm mist a 14-point humidity gain in 10 minutes, about 4 points ahead of Dreo, crediting the two 360-degree nozzles that spread mist without raising airflow. Day to day, the VeSync app keeps mode, mist output and humidistat target on a single screen instead of nested menus, and the Plant Care feature with care instructions plus Alexa and Google voice control covers both plants and people. Its limits are capacity and clutter: the 4.5-liter tank is the smaller of the two, the app's home screen pushes marketing you must disable in settings, and warm mist costs more energy than cool mist. The Amazon US listing observed on 09/12/2026 showed a live variant-block buy box with Add to cart and Buy Now, shipped from Amazon.com and sold by Amazon.com, with the price held behind the add-to-cart step.
Dreo HM713S: the big-tank cool-mist pick
The Dreo HM713S in White suits large rooms and cool-mist routines: the 6-liter tank with a folding handle is the largest in CNET's comparison, output reaches 500 mL per hour, and CNET scored it best for cool mist while still beating other brands' cool-mist scores on warm. Control is precise without fuss: set any target from 30 to 90 percent with a 5 percent tolerance, read the humidity indicator light from far away, and pick Manual, Auto or Sleep Mode, with app scheduling and voice through Alexa and Google. Dreo's standout is upkeep: maintenance videos and a customizable cleaning reminder sit right in the app instead of buried in a manual. Its limits are the warm-mist gap and coverage: CNET found its warm mist less powerful than Levoit's, the warranty is one year against longer rival coverage, and warm mist adds a noticeable if small amount to the electric bill. The Amazon US listing observed on 09/12/2026 showed a live variant-block buy box with Add to cart and Buy Now, shipped from Amazon.com and sold by Amazon.com, with the price held behind the add-to-cart step.
Where to check the exact variants
Compare the Levoit OasisMist 450S in White with 4.5-liter top-fill tank (live variant-block buy box observed 09/12/2026, shipped from Amazon.com and sold by Amazon.com) against the Dreo HM713S in White with 6-liter tank (live variant-block buy box observed 09/12/2026, shipped from Amazon.com and sold by Amazon.com). One tower for stronger warm mist and plant care, one for longer runtime and cool-mist output; pick by which mist mode your winter actually runs. Confirm the live price on each exact variant before deciding, since neither observed buy box exposed a price line.