Honeywell HCM350B Germ Free Cool vs LEVOIT Classic 300S Smart Humidifier
Both made our Best Humidifiers for Allergies shortlist, at #1 and #2. Here's how they differ and who each one suits.
- BuyOnceRight Research Desk
- Updated
- 4 min read
Quick verdict
Choose the Honeywell HCM350B Germ Free Cool Mist Humidifier if you want wicking filter design cannot over-humidify a room, reducing dust mite and mold conditions. Choose the LEVOIT Classic 300S Smart Humidifier if you'd rather have auto Mode keeps the room from exceeding 50 percent humidity, limiting dust mite and mold conditions. Overall we rank the Honeywell HCM350B Germ Free Cool Mist Humidifier higher: #1 versus #2 in our Best Humidifiers for Allergies list.
Winner overall: Honeywell HCM350B Germ Free Cool Mist Humidifier
Honeywell HCM350B Germ Free Cool Mist Humidifier vs LEVOIT Classic 300S Smart Humidifier compared
Every difference that matters, in one table.
| Attribute | ||
|---|---|---|
| Our ranking | #1 of 4 in Best Humidifiers for Allergies | #2 of 4 in Best Humidifiers for Allergies |
| Pick label | Best overall | |
| Brand | Honeywell | Levoit |
| Key features | Wicking filter traps minerals before output; Self-regulating humidity output; 1.1-gallon tank | Auto Mode humidity sensor; App-based humidity tracking; 6L top-fill tank, wide opening for cleaning |
| Biggest strength | Wicking filter design cannot over-humidify a room, reducing dust mite and mold conditions | Auto Mode keeps the room from exceeding 50 percent humidity, limiting dust mite and mold conditions |
| Main trade-off | Replacement filters are a recurring cost, roughly every 1 to 2 months | Ultrasonic mechanism can aerosolize mineral dust and any tank bacteria without distilled water and frequent cleaning |
| Best for | allergies | allergies |
Which should you buy?
#1 pick · Best overall
Choose the Honeywell HCM350B Germ Free Cool Mist Humidifier if…
- Wicking filter design cannot over-humidify a room, reducing dust mite and mold conditions
- No aerosolized mineral dust, unlike filterless ultrasonic units
- Dishwasher-safe parts make the frequent cleaning allergy sufferers need far less of a chore
Best for: allergies
Prefer the alternative? See the LEVOIT Classic 300S Smart Humidifier section.
#2 pick
Choose the LEVOIT Classic 300S Smart Humidifier if…
- Auto Mode keeps the room from exceeding 50 percent humidity, limiting dust mite and mold conditions
- App tracking makes it easy to confirm the room is actually staying in the 30 to 50 percent range
- Wide-mouth top-fill tank is easier to scrub thoroughly than a narrow-neck bottle-style tank
Best for: allergies
Prefer the alternative? See the Honeywell HCM350B Germ Free Cool Mist Humidifier section.
Pros and cons of each
Honeywell HCM350B Germ Free Cool Mist Humidifier
Pros
- Wicking filter design cannot over-humidify a room, reducing dust mite and mold conditions
- No aerosolized mineral dust, unlike filterless ultrasonic units
- Dishwasher-safe parts make the frequent cleaning allergy sufferers need far less of a chore
Cons
- Replacement filters are a recurring cost, roughly every 1 to 2 months
- Fan noise is more audible than an ultrasonic unit
- 1.1-gallon tank needs daily refills with continuous use
LEVOIT Classic 300S Smart Humidifier
Pros
- Auto Mode keeps the room from exceeding 50 percent humidity, limiting dust mite and mold conditions
- App tracking makes it easy to confirm the room is actually staying in the 30 to 50 percent range
- Wide-mouth top-fill tank is easier to scrub thoroughly than a narrow-neck bottle-style tank
Cons
- Ultrasonic mechanism can aerosolize mineral dust and any tank bacteria without distilled water and frequent cleaning
- Requires a stricter cleaning schedule than the filtered Honeywell for allergy sufferers
- Higher price point than basic allergy-focused units
Honeywell HCM350B Germ Free Cool Mist Humidifier vs LEVOIT Classic 300S Smart Humidifier: common questions
Which is better, the Honeywell HCM350B Germ Free Cool Mist Humidifier or the LEVOIT Classic 300S Smart Humidifier?
Choose the Honeywell HCM350B Germ Free Cool Mist Humidifier if you want wicking filter design cannot over-humidify a room, reducing dust mite and mold conditions. Choose the LEVOIT Classic 300S Smart Humidifier if you'd rather have auto Mode keeps the room from exceeding 50 percent humidity, limiting dust mite and mold conditions. Overall we rank the Honeywell HCM350B Germ Free Cool Mist Humidifier higher: #1 versus #2 in our Best Humidifiers for Allergies list.
What is the difference between the Honeywell HCM350B Germ Free Cool Mist Humidifier and the LEVOIT Classic 300S Smart Humidifier?
The Honeywell HCM350B Germ Free Cool Mist Humidifier stands out because wicking filter design cannot over-humidify a room, reducing dust mite and mold conditions, while the LEVOIT Classic 300S Smart Humidifier stands out because auto Mode keeps the room from exceeding 50 percent humidity, limiting dust mite and mold conditions. The trade-offs differ too: the Honeywell HCM350B Germ Free Cool Mist Humidifier's main caveat is that replacement filters are a recurring cost, roughly every 1 to 2 months, and the LEVOIT Classic 300S Smart Humidifier's is that ultrasonic mechanism can aerosolize mineral dust and any tank bacteria without distilled water and frequent cleaning.
Is the Honeywell HCM350B Germ Free Cool Mist Humidifier worth it over the LEVOIT Classic 300S Smart Humidifier?
For most buyers, yes: it's our #1 pick. Consider the LEVOIT Classic 300S Smart Humidifier instead if replacement filters are a recurring cost, roughly every 1 to 2 months is a deal-breaker for you.
Who should buy the LEVOIT Classic 300S Smart Humidifier instead of the Honeywell HCM350B Germ Free Cool Mist Humidifier?
The LEVOIT Classic 300S Smart Humidifier suits allergies, while the Honeywell HCM350B Germ Free Cool Mist Humidifier is best for allergies.