Levoit OasisMist LUH-O451S-WUS User manual

OasisMist™ Smart Humidifier
Model: LUH-O451S-WUS
Questions or Concerns?
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USER MANUAL

2
Table of Contents
Package Contents
Specifications
Safety Information
Getting to Know Your Smart Humidifier
Controls
Getting Started
VeSync App Setup
Using Your Smart Humidifier
Care & Maintenance
Troubleshooting
VeSync App Troubleshooting
Warranty Information
Customer Support
1 ×Smart Humidifier
1 ×Cleaning Brush
3 ×Aroma Pad (1 Pre-Installed)
3 ×Absorption Pad (1 Pre-Installed)
2 ×Water Filter Sponge (1 Pre-Installed)
1 ×User Manual
1 ×Quick Start Guide
2
2
3
5
7
8
10
11
15
20
23
25
26
Specifications
Package Contents
Power Supply AC 120V, 60Hz
Rated Power 280W
Water Tank
Capacity 1.19 gal / 4.5 L
Max Cool Mist
Output 300 mL/h
Max Warm
Mist Output 550 mL/h
Max Runtime
45 hours on low mist
setting
Note: The humidifier may
run for a longer or shorter
time depending on the
environmental temperature
and humidity.
Noise Level
Lowest: < 26dB (Low
Cool Mist)
Highest: < 41dB (High
Warm Mist)
Eective
Range 215–430 ft / 20–40 m
Dimensions 10.8 x 6.0 x 11.97 in /
27.4 x 15.2 x 30.4 cm
Weight 5.3 lb / 2.4 kg
Note: To access additional smart humidifier
functions, download the free VeSync app
(see page 10).

3
SAFETY INFORMATION
• Only use the humidifier as described
in this manual.
• Place the humidifier and cord so that
it will not be knocked over. Do not
place near large pieces of furniture or
in high-trac areas.
• When not in use, turn the humidifier
o and disconnect from power by
removing the plug from the outlet.
• Do not use the humidifier in wet
environments.
• Keep the humidifier out of reach from
children.
• Do not open the base or remove the
water level sensor for self-servicing.
• Always unplug your humidifier from
the power outlet before cleaning your
humidifier or detaching the water tank
from the humidifier base.
• Always make sure to place the
humidifier on a flat, level surface
before operation.
• Only fill the water tank with clean
water. Never fill the water tank with
any other liquids.
• Do not place the humidifier near
sources of heat, such as stovetops,
ovens, or radiators.
• Do not place the humidifier directly
on floors, carpets, or rugs.
• Do not use other items as
replacement parts for this product.
To reduce the risk of fire, electric shock, or other injury, follow all instructions
and safety guidelines.
General Safety
• Do not cover the nozzles while
the humidifier is on. Doing so may
damage the humidifier.
• Remove the water tank from the base
before moving the humidifier.
• Do not immerse the humidifier base,
power cord, or plug in water.
• Do not clean the humidifier
immediately after turning it o,
especially if it has been diusing
warm mist. Allow the humidifier
to cool down completely before
cleaning.
• If the humidifier is damaged or is
not functioning properly, stop using
it and contact Customer Support
immediately (see page 26).
• This humidifier is not to be used by
persons (including children) with
reduced physical, sensory, or mental
capabilities, or lack of experience
and knowledge, unless they have
been given supervision or instruction
concerning use of the appliance by a
person responsible for their safety.
• Supervise children when they are
near the humidifier.
• Children should not clean or perform
maintenance on the humidifier
without supervision.
• Children should be supervised to
ensure that they do not play with the
humidifier.
• Not for commercial use. Household
use only.
READ AND SAVE THESE
INSTRUCTIONS

4
Power & Cord
Electromagnetic Fields (EMF)
• Ensure that the plug fits properly
into a polarized socket.
• Your humidifier has a polarized
plug (one prong is wider than the
other), which fits into a polarized
outlet only one way. This is a
safety feature to reduce the risk of
electric shock. If the plug does not
fit, reverse the plug. If it still does
not fit, do not use the plug in that
outlet. Do not bypass this safety
feature.
• Do not handle the power cord or
plug with wet hands. Keep the plug
and power cord away from liquids.
• If the power supply cord is
damaged, it must be replaced by
Arovast Corporation or similarly
qualified persons in order to avoid
an electric or fire hazard. Please
contact Customer Support (see
page 26).
• Unplugging the power cord
will disable remote control of
the humidifier and temporarily
disconnect the humidifier from
VeSync and other third-party apps.
This humidifier complies with all
standards regarding electromagnetic
fields (EMF). If handled properly and
according to the instructions in this
user manual, the appliance is safe
to use based on scientific evidence
available today.
SAFETY INFORMATION (CONT.)
• Only add essential oils to
the aroma pad.
• Do not add essential
oils, supplemental water
treatment liquids, or water
filters into the water tank
or base chamber. This will
damage the humidifier
and cause leaks.
Caution: Risk of Leaks
and Electric Shock
• Let nozzles and mist tube
cool before touching or
cleaning.
Caution: HOT Water Vapor

5
GETTING TO KNOW YOUR SMART HUMIDIFIER
A. Top Cover
B. Nozzles
C. Handle
D. Water Tank
E. Mist Tube
F. LED Display
G. Control Panel
H. Base
I. Water Filter
J. Water Filter Sponge
K. Heating Element
L. Float
M. Transducer
N. Float Brackets
O. Power Cord
P. Noise Silencer
Q. Absorption Pad
R. Air Outlet
S. Aroma Pad
T. Aroma Box
U. Humidity Sensor / Air Inlet (In
Aroma Box Compartment)
V. Air Inlet (Under the Base)
W. Cleaning Brush
X. Feet
Y. Mist Channel (Under Water Tank)
A
C
F
G
H
W
E
T
P
Q
R
V
S
U
I
O
J
K
N
D
BL
X
M
Y

6
Wi-Fi® Indicator
No Water Indicator
On/O Button
Sleep Mode Indicator
Warm Mist Button
Sleep Mode Button
Relative Humidity (RH)
Percentage
Warm Mist
Indicators
Mist Level Button
Auto Mode Button
Mist Level Indicators
Auto Mode Indicator
Mist Level Indicators (White)
Low Mist
Medium Mist
High Mist
Heat O
Low Heat
Medium Heat
High Heat
Warm Mist Indicators (Orange)
GETTING TO KNOW YOUR SMART HUMIDIFIER (CONT.)

7
CONTROLS
On/O Button
• Press to turn the humidifier
on/o.
• Press and hold for 5 seconds
to pair with the VeSync app.
See the in-app instructions for
more information.
• Press and hold for 15 seconds
to reset the humidifier. This
will restore the humidifier’s
default settings and
disconnect it from Wi-Fi® and
the VeSync app (see page 10).
Mist Level Button
• Press repeatedly to cycle
through mist level settings:
low, medium, and high mist.
• Press and hold for 3 seconds
to turn the display o. Press
any button to turn the display
back on.
Auto Mode Button
• Press to turn Auto Mode on
(see page 12).
• Press to use warm mist
while in Auto Mode.
• Press / / to turn
Auto Mode o and resume
manual controls.
Warm Mist Button
• Cycles through warm mist
settings: low heat, medium
heat, high heat, and heat o
(see page 11).
Sleep Mode Button
• Press to turn Sleep Mode
on/o (see page 12).
Wi-Fi Indicator
• Turns on, o, or blinks to
indicate pairing status. See
the VeSync in-app instructions
for more information.
No Water Indicator
• Blinks when there is no water
in the tank. After this indicator
blinks 10 times, the humidifier
will turn o. Refill the tank and
properly place it on the base
to use your humidifier.
• Lights up when the water tank
is removed. Remains on until
the tank is replaced.
Note: You can also use the VeSync app to control these functions, as well as additional
app-only features (see page 10).

8
GETTING STARTED
Filling & Refilling
1. Remove all packaging.
2. Clean the water tank and water tank
cover before first use.
3. Choose a hard, flat location for the
humidifier at least 12 inches / 30 cm
away from any walls. The surface must
be water-resistant. [ Figure 1.2 ]
Figure 1.2
Figure 1.3
Figure 1.1
Note: Check to make sure that the water
filter is correctly in place. If not, then rotate
the filter clockwise to secure it in place.
[Figure 1.1}
Note: Make sure the water tank is clean before
filling.
1. Remove the water tank cover.
[ Figure 1.4 ]
Figure 1.4
4. Mist should be directed away from walls,
furniture, bedding, and appliances.
[ Figure 1.3 ]Avoid letting too much mist
fall on the side of the humidifier with the
aroma box, as this may interfere with the
sensor inside the aroma box.
12 in /
30 cm
12 in /
30 cm
Note:
• Do not place the humidifier directly on
floors, carpets, or rugs.
• Placing the humidifier away from walls
ensures that the humidity sensor and air
inlets function properly.

9
Figure 1.5
Note:
• We recommend using purified or distilled
water to fill the tank.
• Using tap water may result in a white dust
(dried minerals) on surfaces
Figure 1.4
Figure 1.5
• Do not add water directly into the base
chamber. [ Figure 1.7 ]
CAUTION
• Do not add water through the mist tube.
• Do not add essential oils into the
humidifier. Only add essential oils to the
aroma pad. [ Figure 1.5 ]
• Do not use water treatment liquids or
third-party water filters in this humidifier.
2. Use the handle to remove the tank
from the base. Fill the tank with room-
temperature water. [ Figure 1.5 ]Do not
fill with hot water.
3. Replace the water tank cover and place
the tank back on the base.

10
VESYNC APP SETUP
1. To download the VeSync app, scan
the QR code or search “VeSync” in the
Apple App Store® or Google Play Store.
[ Figure 2.1 ]
Note: Due to ongoing updates and improvements,
the VeSync app may be slightly dierent than
shown in the manual. In case of any dierences,
follow the in-app instructions.
Note: You must create your own VeSync
account to use third-party services and
products. These will not work with a guest
account. With a VeSync account, you can
also allow your family and friends to control
your smart humidifier.
Wi-Fi Connection
• To disconnect Wi-Fi, press and
hold for 15 seconds until the Wi-Fi
indicator turns o. This will restore the
smart humidifier's default settings and
disconnect it from the VeSync app.
• To reconnect, please follow the
instructions in the VeSync app for
adding a device.
2. Open the VeSync app. If you already
have an account, tap Log In. To create a
new account, tap Sign Up.
Figure 2.1
3. Follow the in-app instructions to set up
your smart humidifier.
Note:
• You can use the VeSync app to connect
your smart humidifier to Amazon Alexa
or Google Assistant™. Follow the in-app
instructions to connect VeSync to your
voice assistant.
• Your phone must have Location turned
on while your phone is connecting to
your smart humidifier. This is required to
establish the Bluetooth® connection. You
can turn Location o after your smart
humidifier is finished connecting to
the VeSync app.

11
USING YOUR SMART HUMIDIFIER
1. Plug in the humidifier. The indicators
on the display will light up for 1 second,
then turn o.
2. Press to turn your humidifier on. The
humidifier will start misting.
Note: Using the VeSync app allows you to control
your smart humidifier remotely and access
additional functions and features (see page 10).
Note: If there is no water in the tank, will
flash 10 times, and the humidifier will turn
o. Fill the water tank (see Getting Started,
page 8).
Note: You can also set the humidifier to
automatically stop misting when the room
reaches a specific humidity level (see Auto
Mode, page 12).
Warm Mist
• Press to turn on warm mist. Keep
pressing to increase the heat setting
of the mist, and to turn warm mist
o. [ Figure 3.3 ]
• The humidifier may take 15 minutes to
warm up before producing warm mist.
• Caution: Mist may be hot. Do not place
your bare hands, face, or other exposed
skin over the nozzles while using warm
mist. [ Figure 3.4 ]Nozzles can reach
temperatures as high as 140ºF / 60ºC.
Figure 3.1
Figure 3.3
Figure 3.4
Figure 3.2
Note:
• Direct the nozzles away from any
furniture, walls, or other objects to
prevent them from getting wet.
• Do not inhale the mist directly from the
nozzles.
3. Press repeatedly to cycle through
mist settings: Low, Medium, and High.
[ Figure 3.1 ]
4. Rotate the nozzles to adjust the direction
of the mist. [ Figure 3.2 ]
5. Optionally, use the controls or the VeSync
app to turn on warm mist, activate Sleep
Mode, and more (see Controls, page 7).
6. When your room has reached your
preferred humidity level, turn the
humidifier to a lower setting, or turn it o.
A comfortable humidity level is between
40% and 60%.
7. Press to turn your humidifier o.
Low Mist
Medium Mist
High Mist
Heat O
Low Heat
Medium Heat
High Heat

12
Warm Mist
Setting
Nozzle Temperature
(+/- 5%)
Low Heat 104ºF / 40ºC
Medium Heat 122ºF / 50ºC
High Heat 140ºF / 60ºC
Room
Relative Humidity *
Automatic
Mist Level
Under 50% High
50–55% Medium
55–60% Low
Over 60% Automatic Stop
Warm Mist (cont.)
Auto Mode
Turning Off the Display
Sleep Mode
Auto Mode uses the humidifier’s sensor
to automatically adjust the mist level to
maintain a target humidity level. The default
target humidity level is 60%. Sleep Mode changes the humidifier’s mist
setting to low and turns o the display lights,
making it ideal for sleep. Sleep Mode can
only be used with cool mist.
The display will automatically dim after 3
seconds of inactivity.
*If you change the target humidity from
60% in the VeSync app, the humidity
percentages will change accordingly.
Note: You can use the VeSync app to change
the target humidity level to fit your needs.
Note: Sleep Mode automatically turns o
warm mist to reduce noise levels.
Note: The humidifier will automatically mist
for 15 seconds after being turned on, even
if the room has reached the target humidity
level.
1. Press to turn Auto Mode on.
2. Optionally, press to turn on warm
mist and adjust the warm mist setting.
3. By default, Auto Mode uses Automatic
Stop. The humidifier will stop misting
when the highest target humidity level is
reached (default 60%).
• Press to turn Sleep Mode
on/o.
• When Sleep Mode is on, you can
press any button to wake up the
display. If you stop touching the
display, the display will turn o
again after 6 seconds.
• Once you wake up the display,
press any button to exit Sleep Mode
and resume manual controls.
• To turn o the display, press and
hold for 3 seconds.
• To turn the display back on, press
any button.
Note:
• In the VeSync app, you can turn
Automatic Stop on/o.
• If Automatic Stop is o, the humidifier will
keep running on low mist level when the
highest target humidity level is reached.
4. The humidifier will continue detecting
the humidity level in the room. It will
start and stop misting again according
to the following table:

13
Absorption Pads
Memory Function
Using the Aroma Box
The mineral absorption pads help reduce
mineral buildup (scale) inside the humidifier,
especially on the heating element.
Your humidifier can be used for
aromatherapy.
Note: For information on replacement
absorption pads, see page 18.
1. Push the aroma box at the back of the
base and pull it out. [ Figure 4.1 ]
• The humidifier will remember your
settings for Mist Level, Warm Mist,
and Wi-Fi settings when turned o
or unplugged, and will resume those
settings when turned back on.
• The humidifier will remember Sleep
Mode or Auto Mode settings, and
the display will automatically turn
back on when the humidifier is
turned back on.
2. Put 8–10 drops of essential oils on the
aroma pad. [ Figure 4.2 ]
3. Insert the aroma box back into the
humidifier.
4. Turn on the humidifier. The humidifier
will automatically diuse aroma when
used.
Figure 4.1
Figure 4.2
Figure 4.3
Note:
• Do not add essential oils, water
treatment liquids, or third-party water
filters into the water tank or base
chamber. Only add essential oils to the
aroma pad. [ Figure 4.3 ]
• The aroma pads can be cleaned and
reused after diusing essential oils (see
Cleaning the Aroma Pad & Absorption
Pad, page 18).
• This humidifier uses a small heat-based
aroma diuser. The aroma is intended to
be light.
• For information on replacement aroma
pads, see page 18.

14
VeSync App Functions
Automatic Shutoff Important Tips
The humidifier will automatically turn o
when all of the water in the tank has been
diused. will show on the display and
blink 10 times before the humidifier turns
o. Fill the water tank (see Getting Started,
page 8).
If the tank has been removed from the
base, the humidifier will automatically stop
misting. will show on the display and
will turn o once the tank is placed properly
back on the base.
Your humidifier must have the correct level
of water in the base chamber to work
properly. If there is too much water in the
base chamber, the humidifier cannot create
mist.
The VeSync app allows you to access
additional smart functions, including those
listed below.
Note: The VeSync app is continually updated
and app features will expand.
• Do not place the humidifier on an
inclined surface.
• Never pour water directly into the
base chamber. [ Figure 5.1 ]Only
add water to the water tank. The
humidifier will automatically release
the correct amount of water into the
base chamber.
Remote Control From Your Phone
• Turn the humidifier on/o.
• Cycle through mist levels and heat
levels.
• Turn Auto Mode on/o and set target
humidity level.
• Turn Sleep Mode on/o.
• Turn the display lights on/o.
Monitor Humidity Levels
• Check current humidity levels in the
humidifier’s environment.
Set Timers & Schedules
• Program individual timers or create a
schedule for your smart humidifier.
Third-Party Voice Control
• Compatible with Amazon Alexa and
Google Assistant™ for voice commands.
Figure 5.1
Figure 5.2
• Avoid moving or shaking the
humidifier. [ Figure 5.2 ]This may
cause the water tank to release too
much water into the base chamber.
• Before moving the humidifier, turn it
o, unplug it, and remove the water
tank. Empty any excess water from
the base chamber.

15
Note: If you’ve been using the warm mist
setting, allow the humidifier to cool before
cleaning.
Note: When pouring out water, hold down the
float to ensure that it does not fall out of the
base chamber.
Figure 6.1
Figure 6.2
Figure 6.3
CARE & MAINTENANCE
Note:
• All maintenance should be done on a water-
resistant surface, such as a kitchen counter.
• Change the water daily to avoid bacteria
growth.
• Use a tissue or cloth to clean the nozzles
regularly.
• If not using the humidifier for 1 week or longer,
do not leave water inside. Clean and dry the
humidifier instead.
Note:
• Never immerse the base in water or liquid.
Do not place any part of the humidifier in a
dishwasher.
• Do not use detergents to clean the humidifier.
Cleaning
You should clean your humidifier water tank
and base chamber every 3 days, and when
you’re ready to store it.
1. Unplug the humidifier.
2. Remove and rinse the water tank cover.
[ Figure 6.1 ]
3. Remove the water tank from the base.
Pour out any water from the tank and
base chamber. If you’ve used the warm
mist setting, use caution in case the
water is still hot.
4. Remove the water filter from the tank by
rotating it counterclockwise and lifting it
out. [ Figure 6.2 ]
5. Remove the water filter sponge from
the water filter if necessary for cleaning.
[ Figure 6.3 ]

16
Descaling Your Humidifier
1. Remove the water filter and water filter
sponge from the tank. Flip the tank
over and remove the mist channel.
Then, remove the noise silencer and
absorption pad from the base.
2. Fill the tank with 3 US cups / 710 mL of
distilled white vinegar. [ Figure 7.1 ]
6. Flip the water tank over. Pinch the tab
and pull out the mist channel. [ Figure 6.4 ]
Care and Maintenence (cont.)
Figure 7.1
Figure 7.2
Figure 7.3
Figure 6.5
Figure 6.4
7. Remove the float, noise silencer,
absorption pad, and aroma box from
the base.
8. Rinse all parts (except the outside of
the base) with room temperature water.
[ Figure 6.5 ]
To descale the humidifier (remove mineral
buildup):
3. Replace the tank cover and swish the
vinegar around the tank. [ Figure 7.2 ]
4. Place the tank on the base and soak for
15–20 minutes. Vinegar will drain into
the base chamber and loosen scale
(mineral buildup) in the tank and in the
base chamber (including the transducer
and float). [ Figure 7.3 ]
9. Dry all parts with a cloth. Make sure
all parts are completely dry before
reassembling or storing.
3
cups

17
Descaling Your Humidifier (cont.)
Figure 7.5
Figure 7.6
Figure 7.4
Figure 7.7
Figure 7.8
5. Remove the tank, remove the tank
cover, and pour out any vinegar.
[ Figure 7.4 ]
6. Remove the float from the base
chamber by pulling up the larger side of
the float and pulling the shaft out from
the float brackets. One side of the float
brackets is open (U-shaped) to allow the
shaft to be removed. [ Figure 7.5 ]
7. Place the float, water filter, mist channel,
aroma box, and noise silencer in a
container. Fill with enough vinegar to
cover them. Soak for 15–20 minutes.
[ Figure 7.6 ]
8. Use a soft cloth and the included
cleaning brush to remove scale from all
parts. [ Figure 7.7 ]
9. Rinse all parts until any vinegar smell is
completely gone. [ Figure 7.8 ]

18
If the aroma pad or absorption pad is sti
even after cleaning, then it needs to be
replaced. Extra pads are included with the
humidifier.
To maintain the performance of your
humidifier, only use ocial Levoit aroma
pads and absorption pads. For more
information, contact Customer Support
(see page 26).
Cleaning the Aroma Pad &
Absorption Pad
Replacing the Aroma Pad &
Absorption Pad
1. Pull out the aroma box and remove the
aroma pad. [ Figure 8.1 ]
Figure 8.1
Figure 8.4
Figure 8.5
Figure 8.2
Figure 8.3
2. Remove the noise silencer, then remove
the absorption pad from on top of the
heating element. [ Figure 8.2 ]
3. Rinse the pads under warm, running
water. [ Figure 8.3 ]
4. Dry the pads with a clean cloth.
5. Place the aroma pad back into the
aroma box. [ Figure 8.4 ]
6. Place the absorption pad back into the
base. [ Figure 8.5 ]
Note: Do not use liquid cleaners or
detergents to clean the pads or any other
part of the humidifier.

19
Reassembling
1. Place the float back into the base
chamber: [ Figure 9.1 ]
a. Make sure the correct side of the
float is facing up.
b. Insert the smaller prong into the
closed side of the float brackets.
c. Place the larger prong into the
open (U-shaped) side of the float
brackets.
Storing
Follow the cleaning instructions (see page
15) and allow all parts to dry completely
before storing. Store in a cool, dry location.
2. Place the absorption pad and the noise
silencer back over the heating element.
[ Figure 9.2 ]
Figure 9.1
Figure 9.4
Figure 9.3
Figure 9.2
3. Flip the water tank over and replace the
mist channel. Figure 9.3 ]
4. Make sure the water filter sponge is
securely placed inside the water filter.
Place the water filter back into the tank
and rotate it clockwise to secure it in
place. [ Figure 9.4 ]
5. Refill the tank, if necessary. Place the
tank properly on the base and place the
tank cover on the water tank.

20
Problem Possible Solution
Humidifier doesn’t turn on,
or turns o unexpectedly.
Plug the humidifier into a working outlet and turn it on.
Add purified or distilled water to the water tank.
Little or no mist comes out.
Turn the mist level to a higher setting.
Fill the water tank.
There may be too much water in the base chamber. Empty the base
chamber. Refill the water tank (not the base chamber) and place the
water tank properly onto the base.
Make sure the air inlets on the bottom of the base and in the aroma box
are not blocked. The humidifier should not be set on carpet or other
surfaces that may block the air inlets.
Clean the humidifier (see Care & Maintenance, page 15). Make sure the
nozzles are not blocked or clogged.
Make sure the humidifier is on a level surface.
If the water tank or base was washed with detergent, rinse thoroughly
with clean water to remove any detergent.
Clean the water filter (see page 17) or replace the water filter sponge with
a new one. One replacement water filter sponge is included with this
humidifier. For information on additional replacements, contact Customer
Support (see page 26).
Humidifier uses water too
quickly.
The humidifier uses up water based on the environmental temperature
and humidity. If your environment is cold and/or dry, the humidifier will
run out of water faster.
Using the warm mist function will use up water faster.
Humidifier produces an
unusual smell.
If the humidifier is new, unplug and rinse all parts, then place in a cool,
dry place for 12 hours.
If essential oils were placed on the aroma pad, rinse the pad under
clean water and allow it to dry.
Clean the humidifier (see Care & Maintenance, page 15).
TROUBLESHOOTING