Costway Ultrasonic Humidifier

With a 4-liter capacity, this humidifier can run for up to 24 hours on a single fill. Depending on the mist setting you choose, you will likely only need to refill it once a day.

No, you should not add essential oils directly to the water tank as this can damage the internal components. Instead, use the dedicated aromatherapy tray located on the unit to safely diffuse your favorite scents.

Yes, it operates at 38 decibels, which is roughly equivalent to the sound of a quiet library or a soft whisper. It is designed to run unobtrusively while you sleep.

No, this is a filter-free model. This design saves you the ongoing cost and maintenance of replacing filters, though you should still clean the tank regularly to prevent mineral buildup.

The built-in humidistat monitors the moisture levels in your room and automatically adjusts the mist output to maintain your desired humidity setting. This helps prevent over-humidification and keeps the environment comfortable without constant manual adjustments.

Yes, the top-fill design allows you to pour water directly into the tank without flipping it over, which significantly reduces the risk of spills. The wide opening also makes it much easier to reach inside and wipe down the interior surfaces during routine cleaning.