Why you should trust this review
I have been reviewing home environment gear for 9 years with prior bylines at Apartment Therapy. For this review I purchased the Dreo HM713S at retail in December 2025. Dreo did not provide a sample. Across 5 months I logged roughly 740 hours of runtime in a 320 square foot bedroom in a Northeast climate.
I tested the HM713S against the Levoit Classic 300S, the Honeywell HCM-350, and a Vicks V745A budget pick. Same Govee H5075 hygrometer, same filtered tap water at 11 grains per gallon hardness.
How we tested the Dreo HM713S
Our protocol runs a minimum of 30 days. For the HM713S we extended testing to 152 days. The specific tests:
- Humidity accuracy, set point of 45 percent, hourly readings on an external hygrometer for 24 hours, 3 runs.
- Mist output, weighed water displacement at maximum and medium for 4 hours.
- Runtime, full tank to shutdown at low, medium, and max for cool and warm modes.
- Power draw, plug load meter on cool and warm modes at matched output.
- Noise, dB meter at 1 meter on each setting.
- App reliability, 50 voice command routines split across Alexa and Google.
Full protocol on our methodology page.
Who should buy the Dreo HM713S?
Buy it if you:
- Want warm mist for cold and flu season. The Levoit Classic 300S does not offer this.
- Need to cover a room between 250 and 400 square feet.
- Care about the dual mist outlet design that throws humidity in two directions.
- Are not already invested in the VeSync ecosystem.
Skip it if you:
- Want the most reliable smart app. VeSync (Levoit) is a step up.
- Need accurate auto humidity hold within 1 percent. Use the Levoit Classic 300S.
- Live with hard water and want zero white dust. Use the Honeywell HCM-350 evaporative instead.
- Care about long term support. Dreo’s response times are slower than Levoit’s based on our 4 support tickets.
Coverage and tank life: the largest practical room rating
In our 320 square foot bedroom test, the HM713S held 43 percent humidity from a 24 percent baseline using auto mode at the 45 percent set point. The Levoit in the same room held 44 percent. Both are competent. In a more open 500 square foot space, the Dreo’s larger 538 square foot rating gave it a roughly 2 percent advantage on average humidity.
The 6 liter tank ran 38 hours per fill at the medium auto setting. That is enough for a full overnight plus a daytime stretch in a typical bedroom. We refilled in the morning every other day.
Warm mist: the differentiator
The HM713S has a 260 W heating element that pre warms water before atomizing. In our flu season test, warm mist raised the room temperature about 1.2 degrees Fahrenheit and produced a noticeably less harsh feel than cool mist. For respiratory comfort during illness it is worth having.
The cost is electricity. We measured 22 W in cool mode and 240 W in warm mode at the same output. Over 8 hours of warm mode that is roughly 1.7 kWh per night.
Humidity accuracy: close to Levoit but not quite there
In our 24 hour set point tests at 45 percent, the HM713S averaged 43.2 percent with a 1.6 percent standard deviation. The Levoit averaged 44.6 percent with a 1.1 percent deviation. The Dreo undershoots by about 1.4 percent on average and oscillates a touch more.
This is not a dealbreaker but it shows. If you set the dial to 45 and a guest checks a separate hygrometer reading 43, the Dreo is the cause.
Dreo app and smart features: functional, less polished
The Dreo app handles scheduling, target humidity, mist level, and warm or cool selection. It connected on first try, firmware updates land cleanly, and routine creation works. The polish gap vs VeSync is in graph history (the Levoit shows a clean humidity history graph, the Dreo shows only a current reading), in alert behavior (low water alerts arrive 2 to 4 minutes later on Dreo), and in overall UI snappiness.
For most users this gap is invisible. For someone who lives in their smart home app, VeSync feels better.
Noise and runtime stability: solid through 5 months
We measured 30 dB on low, 36 dB on medium, and 44 dB on max at one meter. That puts the Dreo about 2 dB louder than the Levoit at each setting, audible only side by side. After 5 months we have not had a power cycle, freeze, or sensor fault. Build quality looks reasonable for the price.
Dreo HM713S vs. the competition
| Product | Our rating | Tank | Coverage | Warm | Price | Verdict |
|---|---|---|---|---|---|---|
| Dreo HM713S | ★★★★☆ 4.3 | 6 L | 538 sq ft | Yes | $99 | Runner-up |
| Levoit Classic 300S | ★★★★★ 4.5 | 6 L | 505 sq ft | No | $89 | Top Pick |
| Honeywell HCM-350 | ★★★★☆ 4.3 | 3.6 L | 500 sq ft | No | $79 | Best Evaporative |
| Vicks V745A | ★★★★☆ 3.6 | 3.7 L | 300 sq ft | Yes | $49 | Skip |
Full specifications
| Tank capacity | 6 liters, top-fill |
| Coverage | Up to 538 sq ft (claimed), 320 sq ft tested |
| Mist type | Ultrasonic cool and warm |
| Output | 350 mL per hour on max cool |
| Runtime (low) | 60 hours rated, 52 hours measured |
| Connectivity | Wi-Fi 2.4 GHz, Dreo app |
| Voice support | Alexa, Google Assistant |
| Display | LED touch panel |
| Power (warm) | 260 W max |
| Warranty | 1 year manufacturer |
Should you buy the Dreo HM713S?
The Dreo HM713S is a credible runner-up to the Levoit Classic 300S in the smart ultrasonic class. Its 6 liter tank, dual mist outlets, and warm mist option (the Levoit lacks this) give it real differentiation. The Dreo app is rougher around the edges, the humidity sensor is 1.4 percent less accurate, and customer support is harder to reach. Worth picking if warm mist or larger room coverage matter to you.
Frequently asked questions
Is the Dreo HM713S worth $99 in 2026?+
If you want warm mist or need to cover a room above 300 square feet, yes. If you want the most polished app and the most accurate humidity sensor, the Levoit Classic 300S is a slightly better pick at a lower price.
Dreo HM713S vs Levoit Classic 300S: which one?+
Pick the Dreo for warm mist, larger coverage, and the dual mist outlet design. Pick the Levoit for app polish, slightly better humidity accuracy, and faster customer support. Both have the same 6 liter tank.
How much extra power does warm mist use?+
We measured 22 W in cool mist mode and 240 W in warm mist mode at the same output level. Over 8 hours that is roughly 1.7 kWh which is around $0.20 to $0.30 of electricity in most US markets.
Does the Dreo app work with Alexa?+
Yes. Setup took about 6 minutes. Routines fired correctly in 43 of 50 commands during our test. The Levoit hit 47 of 50 in the same test, marginally more reliable.
Will it really cover 538 square feet?+
In our 320 square foot bedroom it held 43 percent humidity comfortably from a 24 percent baseline. In a 500 square foot open space it held 36 percent on max. The 538 figure is best case.
📅 Update log
- May 10, 2026Added 5 month long term notes and refreshed Levoit comparison.
- Mar 4, 2026Updated humidity accuracy after Dreo app v3.8 firmware push.
- Dec 15, 2025Initial review published.
Priya Sharma
Priya Sharma writes for The Tested Hub.