Levoit Classic 300S 6L Smart Top-Fill Ultrasonic Humidifier
By Levoit · Humidifiers · Home & Workspace
- Tank 6 L (1.58 gal)
- Run time up to 60 h on low
- Coverage 215-505 ft²
- Noise ≤30 dB
- 26 W, 4.3 lb
Lowest price seen
~$79.99 (approx.)
from $79.99 at Amazon
- Amazon ~$79.99 (approx.)View at Amazon
- LevoitView at Levoit
- eBay (used) eBay: used, open-box, refurbishedView at eBay (used)
- eBayView at eBay
- TargetView at Target
- WalmartView at Walmart
- Best BuyView at Best Buy
- Kohl'sView at Kohl's
- Macy'sView at Macy's
Prices are snapshots. Check the current price with the store.
Summary
The smart 6 L top-fill version of Levoit’s entry ultrasonic humidifier, with app control, an auto-humidity mode, aromatherapy and an optional night light in the box. Check your tolerance for upkeep before buying: descaling, distilled water with hard water and aroma pads as consumables are part of ownership.
Strengths
- Top-fill tank: fill from above without inverting anything.
- Auto mode holds 40–50% relative humidity on its own, or a target you choose.
- Up to 60 hours of runtime from one tank, on Levoit’s wording.
- VeSync app with timers and schedules, plus voice control through Alexa and Google Assistant.
- 360-degree nozzle aims the mist where you want it.
- Three aroma pads, a cleaning brush and a water filter sponge ship in the box.
Weaknesses
- The 60-hour runtime is a manufacturer maximum; Levoit does not say which mist level produces it.
- Ultrasonic tanks need regular descaling and cleaning to avoid slime and mold.
- Hard water turns the mist into white dust; the fix is distilled or demineralized water, a running cost.
- Aroma pads are consumables sold separately, so the box is not the end of spending.
- No parts channel or repair information was found for this model.
- The product page carries a California Proposition 65 warning.
Verified specifications
| Model | Classic 300S Smart Ultrasonic Top-Fill Cool Mist Humidifier. |
|---|---|
| Tank capacity | 6 L, top-fill — no need to invert the tank. |
| Mist levels | Low, Medium, High, plus Auto mode. |
| Auto mode | holds 40–50% relative humidity by default, or a custom target you set. |
| Claimed runtime | up to 60 hours of continuous mist. |
| Claimed coverage | 215–505 ft² (20–47 m²). |
| Nozzle | 360-degree, rotatable. |
| Control | on-device controls, the VeSync app, Amazon Alexa and Google Assistant. |
| Aromatherapy | aroma pad included; replacements sold separately in multi-packs. |
| Night light | optional. |
| Power draw | 26 W. |
| Noise | at or below 30 dB. |
| Weight | 4.3 lb. |
| Dimensions | 9.6 × 7.5 × 13.4 in. |
| In the box | humidifier, 3 aroma pads (1 pre-installed), cleaning brush, water filter sponge, user manual, quick start guide. |
| Warranty | 2-year limited warranty and a 30-day money-back guarantee. |
Full research notes and sources
Runtime, coverage and the spec sheet
Levoit claims up to 60 hours of continuous mist from the 6 L tank, but the manufacturer does not say which mist level earns that figure. Coverage is listed as 215–505 ft² (20–47 m²) with no published test conditions behind it. Auto mode defaults to holding 40–50% relative humidity; a custom target overrides that band.
The remaining spec-sheet numbers — 26 W draw, noise at or below 30 dB, 4.3 lb, and 9.6 × 7.5 × 13.4 in — were not re-checked against the manual, so treat them as approximate.
Upkeep and running costs
Ultrasonic plates and tanks scale up with use, so expect periodic descaling and cleaning; a brush ships in the box, descaling solution does not. With hard water the mist carries white dust, and the mitigation is distilled or demineralized water. Aroma pads are a consumable Levoit sells separately in multi-packs, and the water filter sponge is a wear part.
Where to buy it
Direct from levoit.com the Classic 300S was listed at $79.99, with a 10% promotion showing $71.99 and free shipping; the page states a 2-year limited warranty and a 30-day money-back guarantee. A Walmart listing for the blue variant with night light showed $79.99. A separate site styling itself the official Levoit outlet, levoitofficial.com, asked $89.99 — it is not levoit.com, and the direct storefront is the cheaper channel for the same model.
Is it worth it?
At the $79.99 direct list price from levoit.com, the package is feature-dense for the class: app control, auto-humidity mode, aromatherapy, a 6 L top-fill tank and a night light, with voice control through Alexa or Google Assistant. What is missing is documented proof — no instrumented test of this exact model has been published, and the runtime and coverage claims carry no test conditions. If you want app control and set-and-forget humidity, it covers the basics; if you just want mist, the non-smart Classic 100/160 skips the connectivity.
Which model this is
This page covers the Levoit Classic 300S, the 6 L smart member of Levoit’s Classic ultrasonic line, sold in variants including a blue unit with a night light at big-box stores. Levoit lists the same hardware under several names, such as “Smart Room Humidifier” and “Smart Plant Humidifier”. The US Amazon listing is ASIN B09C24TYGQ.
Sources
Manufacturer:
Independent reviews:
- No instrumented test of the exact Classic 300S model has been read.
Owner reports:
- No owner threads were collected for this model.
Parts and stores:
