Best Humidifiers · head-to-head
Classic 300S Smart Ultrasonic Humidifier vs HCM-350 Cool Moisture Humidifier
A sourced, side-by-side spec comparison. Classic 300S Smart Ultrasonic Humidifier is cheaper at $79.99. Every spec and price links to its source.
Side by side
| Classic 300S Smart Ultrasonic Humidifier | HCM-350 Cool Moisture Humidifier | |
|---|---|---|
| US price | $79.99 (MSRP from levoit.com / VeSync; occasional sale price ~$69.98) | $79.99 (Last known retail price; widely available via third-party sellers) |
| Brand | Levoit | Honeywell |
| Released | 2022 | — |
| type | ultrasonic | evaporative |
| tank capacity liters | 6 | 4.16 |
| coverage sqft | 505 | 500 |
| runtime hours | 60 | 24 |
| smart wifi | true | false |
| top fill | true | false |
| noise dba | 30 | — |
Sources — Classic 300S Smart Ultrasonic Humidifier: levoit.com (verified 2026-06-15). HCM-350 Cool Moisture Humidifier: honeywellstore.com (verified 2026-06-15).