BUY WITH YOUR HOME IN MIND
Choose between a dial and a humidity target
Choose the Levoit Classic 160 if you want a smaller humidifier with a simple mist dial. Choose the Dreo HM311S if you want automatic humidity control, a larger tank and adjustments from your phone.
Both use ultrasonic cool mist and fill from the top. The main difference is how much control you want over everyday use, not whether one makes a more impressive cloud of mist.
The Levoit takes less table space
The Classic 160 has a narrower body and is lighter when empty. That can make it easier to fit on a suitable bedroom table, with room left for a lamp or other essentials. Still allow the clearance its manual requires and space to lift the lid.
The Dreo is wider across the front but shallower. Measure the actual surface rather than choosing by tank size alone. A narrow shelf may suit one shape better than another, and neither should send mist onto bedding, curtains or electronics.
The Dreo holds more water. That gives you more water between refills at the same water-use rate, but the two machines do not necessarily use water at the same rate. Tank capacity does not prove longer useful runtime in your room or better humidity control.
The Dreo can adjust mist automatically
With the Classic 160, you turn the dial to change the output. Check the room humidity yourself and turn the mist down or off when enough moisture has been added. Its low-water shutoff stops it when the tank is empty; it does not stop at a chosen room humidity.
The HM311S adds a built-in humidity sensor and Auto mode. You can select a humidity target instead of relying only on a manual mist setting. App and voice controls add remote adjustments, while the controls on the unit remain useful for everyday changes.
Automatic control is the stronger reason to choose the Dreo. A phone app alone may add little if you only want to turn a nearby dial. It also adds setup that the Levoit does not need.
The sensor reads air near the Dreo, not every corner of the bedroom. Keep its sensor clear and check a separate room humidity meter if the reading seems wrong. Do not keep raising the target to chase a particular number while windows or nearby surfaces are getting wet.
Filling is simple on both, but care still takes time
Both let you remove the lid and pour water into the tank. Neither needs its full tank turned upside down for normal top filling. Follow the fill mark and unplug the machine before removing parts or cleaning it.
Both are ultrasonic, so water choice matters. Low-mineral water helps limit the residue that can settle around a mist humidifier. The Classic’s small water-filter sponge and the Dreo’s optional mineral cartridge are different parts; do not assume either makes ordinary tap water equivalent to distilled water.
The larger Dreo tank means more water to carry when full. The smaller Levoit gives you less to lift at once, with less reserve between refills. Choose the routine you will comfortably keep up with, including emptying old water rather than repeatedly topping it up.
Reviewers praise easy filling and quiet use on both models, while durability concerns appear for both. The Dreo also draws praise for remote adjustment. Those themes are useful cautions, but they do not establish which machine is quieter or lasts longer.
Which would fit your bedroom?
The Classic 160 makes sense when space and simple controls matter most, and you are happy to manage the humidity yourself. The HM311S makes sense when a humidity target and remote control are worth the wider body and added setup.
If avoiding mineral mist matters more than either control layout, consider a wick-based evaporative model instead. A different humidifier type may be a more useful change than moving between two ultrasonic machines.
Looking for a different setup? Our humidifiers for small bedrooms guide also includes a larger manual Dreo and a wick-based Vornado.
If water choice matters more than app controls, read ultrasonic vs evaporative humidifiers to compare mist with a wet wick.
If you already own a mist humidifier and see residue nearby, our white-dust guide helps you check the water before replacing the machine.