10 Best Most Energy Efficient Humidifiers 2025 in the United States

The LEVOIT Classic 160 is a compact ultrasonic cool mist humidifier designed for bedrooms and similar-sized rooms up to about 280 square feet. It features a 2.5-liter water tank that supports up to 25 hours of continuous operation on low mist, which provides a good balance between capacity and energy use, consuming around 17 watts. This long runtime means fewer refills and less frequent power use. Its ultrasonic technology generally uses less electricity compared to traditional warm mist models, making it energy-efficient.

The Dreo Humidifier is a strong choice if you're looking for an energy-efficient cool mist humidifier suitable for bedrooms, nurseries, or similar-sized rooms up to 300 square feet. It uses ultrasonic technology, which is generally low on power consumption—at 26 watts, it is quite energy-friendly compared to other types. The large 4-liter water tank is a standout feature, allowing up to 36 hours of continuous use without refilling, which adds convenience and reduces wasteful frequent refills. Noise level is impressively low at 28 dB, making it very quiet and ideal for light sleepers or babies. The humidifier’s design includes a top-fill feature that makes refilling and cleaning easier, a helpful plus for maintenance.

The Dyson Purifier Humidify+Cool PH2 De-NOx is a high-end humidifier that also purifies air and cools your space, making it a versatile choice for those prioritizing air quality along with humidity control. It stands out with advanced features like a three-stage HEPA filter that captures nearly all tiny particles, and it effectively removes gases and odors while destroying bacteria in the water. The unit can humidify a room of about 270 square feet and includes a built-in humidistat to maintain your desired moisture level automatically. Its airflow technology not only distributes humidity but also provides a cooling breeze, which is a nice bonus for warmer months.