10 Best Most Energy Efficient Humidifiers 2026 in the United States

The LEVOIT Dual 200S is a smart ultrasonic humidifier designed for bedrooms and small spaces up to about 290 square feet. Its 3-liter water tank is a good size, allowing several hours of continuous operation without frequent refills, which helps with convenient use and energy efficiency. At 24 watts, it uses relatively low power, making it one of the more energy-friendly options available. The built-in humidistat is a key advantage, automatically maintaining your preferred humidity level so the device doesn’t waste energy running unnecessarily. Quiet operation means it won’t disturb sleep, which is important for bedroom use.

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 LEVOIT OasisMist 1000S is an energy-efficient humidifier suitable for large rooms up to 600 square feet. It features a large 10-liter water tank that allows it to run up to 100 hours on a single fill, reducing the need for frequent refills. Its ultrasonic operation consumes just 27.5 watts, making it economical to run, while its powerful mist output of 350mL/h helps maintain steady humidity levels in bigger spaces.