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REVIEW

Levoit Classic 300S Review: Quiet, Smart, but Cleaning Still Matters

We assess output stability, noise, controls, cleaning access and ownership cost.

Test method

We evaluate humidifiers in a closed room with independent temperature and humidity logging, sound measurements at a fixed distance, timed refill and cleaning tasks, and repeat testing across output levels.

Performance

The unit raises humidity efficiently in a medium room and its automatic control is useful, though placement strongly affects the built-in sensor.

Cleaning and safety

The top-fill tank is easy to reach, but the base still has channels that need regular attention. Follow the manufacturer cleaning schedule and never add unapproved substances to the water.

Verdict

A strong smart ultrasonic option for users prepared to manage water quality and cleaning.