Humidifiers / Levoit Classic 300S (Classic300S) vs Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)
Levoit Classic 300S (Classic300S)
$79.99
VSVicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)
$19.79
Levoit Classic 300S (Classic300S) vs Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)
Levoit Classic 300S (Classic300S)
The smart ultrasonic everyone buys — and the one that will powder your nightstand.
Wins overall by 0.5 points
Quick Verdict
The Levoit Classic 300S (Classic300S) takes this by a clear 0.5 points. The smart ultrasonic everyone buys — and the one that will powder your nightstand. The Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) only makes sense if it wins on a category you care about more than the total.
The Levoit Classic 300S (Classic300S) and Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) are both closely matched humidifier models, and the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) is $60.20 cheaper than the Levoit Classic 300S (Classic300S) ($19.79 vs $79.99). On Freedom From White Dust, the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) leads (10.0 vs 2.5/10) — the thing marketing never mentions. Ultrasonic humidifiers aerosolise whatever is dissolved in the water and deposit it as white dust on furniture — the EPA notes they are 'very efficient at dispersing minerals in tap water into the air', along with microorganisms from the tank. Evaporative and boiled-steam units do not do this at all. A high score means the technology cannot produce dust; a low score means you are buying distilled water for the life of the machine.. On Humidity Control, the Levoit Classic 300S (Classic300S) leads (8.5 vs 1.0/10) — whether there is a genuine closed-loop humidistat holding a setpoint, or just fixed output steps and a timer with a humidity label on it. On Safety Around Children, the Levoit Classic 300S (Classic300S) leads (8.0 vs 2.0/10) — burn and scald risk from boiled or heated water, tipping hazard, and whether the hygiene story holds up in a nursery. Overall, the Levoit Classic 300S (Classic300S) scores 6.8/10 across our 8 scoring categories versus 6.3/10 for the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series). Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Levoit Classic 300S (Classic300S) | Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) |
|---|---|---|
| Price | $79.99 | $19.79 |
| Release Year | 2021 | 2015 |
| Humidification Technology | Ultrasonic cool mist — a piezoelectric disc shatters water into a visible aerosol that is blown out of a nozzle | Warm steam vaporizer. Current is passed through the water itself to boil it, which is why Vicks' own FAQ states "These units require water with minerals in it in order to function properly" — pure water does not conduct, so the unit will simply not steam |
| White Dust & Mineral Aerosol | Yes, and there is no fix sold for it. the EPA's "Use and Care of Home Humidifiers" states that ultrasonic and impeller humidifiers "are very efficient at dispersing minerals in tap water into the air" and that they "can disperse materials, such as microorganisms and minerals, from their water tanks into indoor air". Levoit sells no demineralisation cartridge for the Classic 300S — the part in the box is an aroma pad and a water-filter sponge, neither of which removes dissolved minerals. TechGearLab's tester warns that on tap water the minerals "eventually start to be noticeable on your furniture". Distilled water is the only real remedy, at roughly $1-1.50 per gallon | None. Boiling drops the minerals out as scale inside the steam unit rather than aerosolising them. The visible particulate this unit does emit is black, not white: Vicks' cleaning instructions tell you to flush it "until black particles are no longer emitted", and those are carbon from the element |
| Tank Capacity | 1.58 gal / 6 L, top-fill | 1.5 gal / 5.7 L |
| Rated Output per Day | Not published by the manufacturer — Levoit publishes runtime and a 26W rated power but no mL/hr or gallons-per-day output figure anywhere on the spec sheet | Not published by the manufacturer as a gallons-per-day or mL/hr figure. The only throughput anchor is the tank divided by the quoted runtime |
| Quoted Runtime (and at which setting) | "Up to 60 hours" — Levoit's own page attaches that figure to the LOW mist setting. 6 L over 60 h is only about 100 mL/hr; on high the same tank empties in a small fraction of that time | Sources conflict: Vicks' own product page says "up to 24 hours", Target's listing for the same V150SGN says 18 hours. There is no output setting to attribute either figure to — the unit has one speed |
| Rated Room Coverage | 215-505 ft² / 20-47 m² (Levoit) | Sources conflict: Vicks' page and Walmart's listing say 600 ft², Target's listing for the same model says 300-500 ft² |
| Humidistat | Real closed-loop humidistat. An onboard humidity sensor feeds Auto mode, which holds 40-50% RH or a custom setpoint; TechGearLab called the auto mode "decently accurate" | None, and no output control either. One switch. It boils at full rate until the tank is empty or you unplug it — the single most over-humidification-prone unit in this set |
| Noise | Levoit claims 30dB or less. TechGearLab measured 38.5dB and describes an ultrasonic whine plus a steady dripping noise as the tank empties — a bedroom-relevant gap between claim and measurement | Not published. There is no fan, so the noise is the boil; users describe intermittent gurgling and, when scaled or over-salted, spitting |
| Filters & Cartridges (Annual Cost) | No wick and no demineralisation cartridge exist for this model, so the strictly required consumable cost is $0/yr. In practice the running cost is distilled water — roughly $1-1.50 a gallon, or about $45-90 over a 60-day heating season at one tank every two days | None required — no filter, no wick, no cartridge. VapoPads and VapoSteam are optional add-ons Vicks would like to sell you; the unit runs on plain tap water |
| Cleaning Burden & Dishwasher-Safe Parts | Above average. The top-fill opening takes an adult hand and the vapour tower has clearance around it; TechGearLab scored cleaning 8.5/10 but flagged small crevices in the base. Nothing is dishwasher-safe. The EPA advice is to "clean portable humidifiers every third day" | Weekly, and the routine is specific: Vicks says soak the steam unit "in 4 inches of white vinegar for 10 minutes", flush until black particles stop, then disinfect the reservoir with "1 teaspoon of bleach per gallon" for 20 minutes. The tank opening is wide. Scale build-up is what causes the spitting complaints |
| UV / Antimicrobial Claim | None claimed. No UV lamp, no silver-ion or antimicrobial coating, no bacteriostatic additive supported | Boiling is the entire hygiene mechanism, and Vicks makes no germ-free or sterilisation marketing claim for it anywhere in the FAQ |
| Mist Temperature & Burn Risk | Cool mist at room temperature — no burn risk, but equally no thermal kill step, so whatever is living in the tank is aerosolised with the water | Boiling. Vicks' placement guidance is to keep the vaporizer "at least four feet away from bedside" on a heat-resistant, waterproof surface. A 638W element and 1.5 gallons of near-boiling water is a scald hazard a toddler can pull over |
| Warranty | 24 months | 36 months |
| Colors | White, Gray, Blue | White |
Category Scores
Freedom From White Dust
The Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) leads clearly here, 10.0 against 2.5 — a 7.5-point margin on the thing marketing never mentions. Ultrasonic humidifiers aerosolise whatever is dissolved in the water and deposit it as white dust on furniture — the EPA notes they are 'very efficient at dispersing minerals in tap water into the air', along with microorganisms from the tank. Evaporative and boiled-steam units do not do this at all. A high score means the technology cannot produce dust; a low score means you are buying distilled water for the life of the machine.. If that is what you are buying for, the Levoit Classic 300S (Classic300S) does not close the gap elsewhere.
Output
The Levoit Classic 300S (Classic300S) and Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) are level here, at 7.0/10 each. actual moisture put into the room per day in gallons or mL/hr, judged against the coverage the manufacturer claims — not the square-footage number on the box is not what separates these two — look to the categories where the scores diverge.
Runtime & Refill Interval
The Levoit Classic 300S (Classic300S) leads clearly here, 8.5 against 7.0 — a 1.5-point margin on how long a full tank really lasts at a useful output setting, rather than at the lowest setting the runtime is quoted for, and how painful the refill is. If that is what you are buying for, the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) does not close the gap elsewhere.
Cleaning & Access
The Levoit Classic 300S (Classic300S) leads clearly here, 7.5 against 6.5 — a 1.0-point margin on whether the tank opening takes an adult hand, whether any part is dishwasher-safe or boilable, and how realistic the manufacturer's stated cleaning interval is to actually keep to. If that is what you are buying for, the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) does not close the gap elsewhere.
Running Cost
The Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) leads clearly here, 8.5 against 5.5 — a 3.0-point margin on wicks, demineralisation cartridges, antimicrobial additives, distilled water and electricity — everything you keep paying after the purchase. If that is what you are buying for, the Levoit Classic 300S (Classic300S) does not close the gap elsewhere.
Quietness
The Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) leads clearly here, 8.0 against 7.0 — a 1.0-point margin on noise at the setting people actually run it overnight, weighted toward independently measured figures over manufacturer claims. If that is what you are buying for, the Levoit Classic 300S (Classic300S) does not close the gap elsewhere.
Humidity Control
The Levoit Classic 300S (Classic300S) leads clearly here, 8.5 against 1.0 — a 7.5-point margin on whether there is a genuine closed-loop humidistat holding a setpoint, or just fixed output steps and a timer with a humidity label on it. If that is what you are buying for, the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) does not close the gap elsewhere.
Safety Around Children
The Levoit Classic 300S (Classic300S) leads clearly here, 8.0 against 2.0 — a 6.0-point margin on burn and scald risk from boiled or heated water, tipping hazard, and whether the hygiene story holds up in a nursery. If that is what you are buying for, the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) does not close the gap elsewhere.
Best For
Choose the Levoit Classic 300S (Classic300S) if…
- • Humidity Control matters most to you — the Levoit Classic 300S (Classic300S) scores 8.5/10 here (whether there is a genuine closed-loop humidistat holding a setpoint, or just fixed output steps and a timer with a humidity label on it).
- • Safety Around Children matters most to you — the Levoit Classic 300S (Classic300S) scores 8.0/10 here (burn and scald risk from boiled or heated water, tipping hazard, and whether the hygiene story holds up in a nursery).
- • Runtime & Refill Interval matters most to you — the Levoit Classic 300S (Classic300S) scores 8.5/10 here (how long a full tank really lasts at a useful output setting, rather than at the lowest setting the runtime is quoted for, and how painful the refill is).
- • Your main use case is nursery or easy-clean.
Choose the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) if…
- • Freedom From White Dust matters most to you — the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) scores 10.0/10 here (the thing marketing never mentions. Ultrasonic humidifiers aerosolise whatever is dissolved in the water and deposit it as white dust on furniture — the EPA notes they are 'very efficient at dispersing minerals in tap water into the air', along with microorganisms from the tank. Evaporative and boiled-steam units do not do this at all. A high score means the technology cannot produce dust; a low score means you are buying distilled water for the life of the machine.).
- • Running Cost matters most to you — the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) scores 8.5/10 here (wicks, demineralisation cartridges, antimicrobial additives, distilled water and electricity — everything you keep paying after the purchase).
- • You want to spend less — it's $60.20 cheaper.
- • Your main use case is warm-mist or no-white-dust.
Pros & Cons
Levoit Classic 300S (Classic300S)
Pros
- +One of the few sub-$100 humidifiers with a genuine closed-loop humidistat rather than a timer wearing a humidity label
- +6L top-fill tank goes two nights between refills at bedroom output levels
- +Auto mode plus app scheduling actually works unattended — TechGearLab rated the humidity tracking accurate
- +Cleaning access is unusually good for an ultrasonic: wide top opening, clearance round the tower
Cons
- −Ultrasonic, so it aerosolises every mineral in the water as white dust on furniture and into the air, and Levoit sells no demineralisation cartridge for it — distilled water is the only fix
- −Levoit publishes no output figure at all: no mL/hr, no gallons per day, so the "215-505 ft²" coverage claim cannot be checked against anything
- −The "up to 60 hours" runtime is the low setting only; run it on high in a genuinely dry room and you are refilling daily
- −Measured 38.5dB against a claimed 30dB, with an audible ultrasonic whine and dripping as the tank drains
- −No antimicrobial or UV stage of any kind, so the every-third-day cleaning the EPA recommends is the entire hygiene plan
Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)
Pros
- +Under $20 for 1.5 gallons of genuinely sterile, dust-free steam — nothing else here is close on price per gallon
- +Zero consumables: no wick, no cartridge, no distilled water, nothing to buy again
- +No fan, so there is no fan noise, and a three-year Vicks warranty at this price
- +Wide tank opening and a published, specific weekly vinegar-and-bleach cleaning routine
Cons
- −It cannot run on distilled or heavily filtered water. Vicks' own FAQ tells you to add "one or two pinches (1/8 tsp) of salt" — up to half a teaspoon — and warns that "too much salt can cause excessive boiling or blow a fuse"
- −638W of boiling water with no output control and no humidistat: one switch, full rate, until the tank runs dry
- −Real scald risk — Vicks says keep it four feet from the bed on a heat-resistant surface, which makes it a poor choice for a toddler's room despite the branding
- −Vicks and its own retailers disagree on both runtime (24h vs 18h) and coverage (600 ft² vs 300-500 ft²) for the same SKU
- −Emits black carbon flakes as the element wears, and the weekly vinegar flush is mandatory rather than advisory
Shop by Need
FAQs
Is the Levoit Classic 300S (Classic300S) or Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) better overall?+
Based on our 8-category scoring, the Levoit Classic 300S (Classic300S) comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for Freedom From White Dust, the Levoit Classic 300S (Classic300S) or the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)?+
The Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) scores higher on Freedom From White Dust (10.0/10 vs 2.5/10) — the thing marketing never mentions. Ultrasonic humidifiers aerosolise whatever is dissolved in the water and deposit it as white dust on furniture — the EPA notes they are 'very efficient at dispersing minerals in tap water into the air', along with microorganisms from the tank. Evaporative and boiled-steam units do not do this at all. A high score means the technology cannot produce dust; a low score means you are buying distilled water for the life of the machine..
Which is better for Humidity Control, the Levoit Classic 300S (Classic300S) or the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)?+
The Levoit Classic 300S (Classic300S) scores higher on Humidity Control (8.5/10 vs 1.0/10) — whether there is a genuine closed-loop humidistat holding a setpoint, or just fixed output steps and a timer with a humidity label on it.
Which is better for Safety Around Children, the Levoit Classic 300S (Classic300S) or the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)?+
The Levoit Classic 300S (Classic300S) scores higher on Safety Around Children (8.0/10 vs 2.0/10) — burn and scald risk from boiled or heated water, tipping hazard, and whether the hygiene story holds up in a nursery.
Which is better for Running Cost, the Levoit Classic 300S (Classic300S) or the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)?+
The Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) scores higher on Running Cost (8.5/10 vs 5.5/10) — wicks, demineralisation cartridges, antimicrobial additives, distilled water and electricity — everything you keep paying after the purchase.
Is the Levoit Classic 300S (Classic300S) worth the price difference over the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)?+
The Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) is the cheaper option at $19.79 versus $79.99. Whether the pricier model is "worth it" depends on how much you value its lead in Freedom From White Dust.
Which is better suited to my use case?+
The Levoit Classic 300S (Classic300S) is the better fit if you mainly care about nursery or easy-clean. The Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) is the better fit for warm-mist or no-white-dust.
What's the warranty on the Levoit Classic 300S (Classic300S) vs the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series)?+
The Levoit Classic 300S (Classic300S) ships with a 24-month warranty; the Vicks Warm Steam Vaporizer V150 (V150SGN / V150RY series) ships with a 36-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Premium Option
Honeywell HCM350 Germ Free Cool Mist Humidifier (HCM350W / HCM350B) — $89.95
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.