6 Humidifiers That You Can Refill From Above

The Levoit Dual 200S Humidifier is a smart top-fill model with a 3-liter tank. Levoit says it can be refilled without flipping anything over. For the refill itself, Levoit’s manual specifies room-temperature water and says not to add water directly into the base chamber or through the mist tube. The manual also warns against supplemental water treatment liquids in the tank or base chamber because they can damage the humidifier and cause leaks.

Levoit’s manual lists the Dual 200S, 2 water filter sponges with 1 pre-installed, a cleaning brush, a user manual, and a quick start guide in the package. For aromatherapy, the manual says to optionally add 10 to 15 drops of essential oil to the base chamber and to fill the water tank only with clean water. Essential oils are not included.

Additional smart functions use the free VeSync app, and the manual says the timer must be set there. Connecting third-party services or products requires your own VeSync account, because those connections do not work with a guest account. Setup requires a secure 2.4GHz Wi-Fi network, and the phone needs Location turned on while it connects to the humidifier over Bluetooth.

The Homedics UHE-CMTF47-WT Humidifier has a 3.7-liter top-fill tank that its manual says can be filled without removing it. The manual describes filling with a pitcher or at the faucet, and says the inside of the tank is easy to clean. Before filling, Homedics instructs owners to turn the power off and unplug the unit from the outlet. It specifies clean, cool (not cold) water, and its safety instructions say not to use water above 86°F.

The manual lists 3 included essential oil pads for the oil tray. Keep oils and other additives out of the water tank: Homedics warns that even a few drops will damage the unit. The manual’s installation steps start by removing the demineralization cartridge from its packaging and soaking it for 10 minutes before adding it to the filled tank. Homedics says the cartridge helps reduce white dust left by hard water. Replace it every 30 to 40 fillings, more often with very hard water, or when white dust buildup increases. If white dust persists after installing a new cartridge, Homedics suggests distilled water. The manual identifies replacement cartridges for purchase as model UHE-HDC4.

The DREO HM311 Humidifier holds 4 liters and accepts refills from above without flipping the tank. DREO also describes a modular design whose parts can be removed and reinstalled for cleaning. The company advertises up to 32 hours of moisture from the tank without a refill. Its product page says water consumption depends on environmental temperature and humidity, with water running out faster in cold or dry conditions.

The HM311 comes with a user manual, a cleaning guide, a cleaning brush, and 2 aroma pads, including 1 pre-installed pad. Essential oils are not included. In its FAQ on water leaks, DREO advises avoiding rooms above 60% relative humidity, wiping away excess water, not shaking the humidifier and placing it on a flat, level surface.

The Homedics UHE-CMTF91 Humidifier has a 5.6-liter top-fill tank. Its manual describes refilling with a pitcher or at the faucet and instructs owners to use both hands when carrying the tank. Homedics recommends distilled water for best results. Before adding water, the manual says to turn the power off and unplug the unit from the outlet. It also says not to fill the tank with warm or hot water.

The CMTF91 includes 1 demineralization cartridge and 3 essential oil pads, according to the manual. Homedics says the cartridge helps reduce the potential for white dust caused by minerals in hard water, and calls for replacement every 30 to 40 fillings, potentially more often with very hard water. The manual identifies the cartridge as model UHE-HDC. For aroma use, it warns never to add essential oils or other additives to the tank or water reservoir, and says putting oil anywhere except the oil tray will damage the humidifier.

The Levoit Classic 300S Humidifier has a 6-liter tank that accepts water directly from above without flipping. Levoit says the wide opening also lets you reach inside for cleaning. Levoit’s manual refill steps have you remove the tank cover, lift the tank off the base by its handles and fill it with room-temperature water, not hot water. The manual cautions against adding water directly into the base chamber or through the mist tube. It instructs owners to unplug the humidifier from the power outlet before cleaning it or detaching the tank from the base.

The Classic 300S comes with 3 aroma pads, including 1 pre-installed pad, a cleaning brush, a user manual, and a quick start guide. Essential oils are not included. Levoit’s manual warns that essential oils, supplemental water treatment liquids, and third-party water filters must not go in the tank or base chamber because they will damage the humidifier and cause leaks. Essential oils go only on the aroma pad.

The free VeSync app provides settings adjustments, schedules, and voice-assistant connections. According to Levoit’s manual, third-party services and products require your own VeSync account and will not work with a guest account. Setup requires a secure 2.4GHz Wi-Fi network.

The DREO HM524 Humidifier is an ultrasonic model with a 6-liter water tank and a filling arrangement that DREO calls Easy Top-Fill. Water enters from above, avoiding an inverted tank during refills. DREO advertises 60 hours of continuous humidification without refilling. The company also says water consumption depends on environmental temperature and humidity, with cold or dry conditions causing the tank to run out faster.

The HM524 package contains the humidifier, a user manual, a cleaning guide, a cleaning brush, and 2 aroma pads with 1 pre-installed. DREO lists an aroma diffuser among its features, but its product page warns that adding essential oils directly to the water tank may cause the tank to rupture because the oils are corrosive.