10 Best Most Energy Efficient Humidifiers 2025 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 Smart Humidifier is designed for larger rooms up to about 505 square feet and features a sizable 6-liter water tank that allows it to run up to 60 hours continuously. Its ultrasonic technology ensures quiet operation at or below 30 decibels, making it suitable for bedrooms, nurseries, or offices where low noise is important. With 26 watts power consumption, it is relatively energy-efficient, especially considering its strong humidification output that claims to work four times faster than some competitors.