Tosot SCWA-4006 Ultrasonic Humidifier Manual fig 7

Tosot SCWA-4006 Ultrasonic Humidifier Manual

Tosot logo

Tosot SCWA-4006 Ultrasonic Humidifier Manual

Tosot SCWA-4006 Ultrasonic Humidifier Manual product img

Welcome to the TOSOT Direct Family!

Tips for First-Time Use We’re extremely happy to welcome you as a new member of our family! To thank you, we’re giving you a warranty extension. Are you interested? All you need to do is register your product at Once your product is registered, we’ll automatically give you a 6-month extension on the manufacturer warranty. It’s that easy! You’ll also get a quick start guide so you can know how to set up and use your product for the first time.

Tips for First-Time Use

  1. Before using the humidifier for the first time, let the unit sit in a room-temperature environment for at least 30 minutes before powering it on.
  2. The suitable operating environment for this product is 41 °F – 104 °F (5°C – 40°C) with a relative humidity level of less than 70%.
  3. For best results use clean, distilled water that is less than 104 °F (40°C) in temperature.
  4. If you have not operated the humidifier within the last month, please clean the water channel and water tank before powering it on.
  5. Replace the water in the water tank and water channel every day to prevent the growth of bacteria.

This symbol throughout the manual points out a potentially hazardous situation that if not avoided may result in death or serious injury. Please use caution when operating this device.

Safety Instructions

Please read all instructions before use and save this user manual for future reference. A digital version can be found by visiting the product pages on our website,, or by contacting to ask for a digital version.
Your safety and the safety of others are very important to us. We have provided many important safety messages thought out this manual and on the appliance itself. Always read and follow all posted safety messages.

If you have any doubt, please contact with any questions. To reduce the risk of fire, electric shock, injury, or death to persons using or near this appliance, please follow some basic safety precautions. These precautions include, but are not limited to, the following:


  • To avoid the risk of electrical shock, do not grasp the power cord or the unit with wet hands, and avoid placing the product where it could be splashed with water.
  • Avoid placing the unit itself or any other objects on top of the power cord, including rugs or carpeting.
  •  Keep air inlet/outlets free from obstruction and clean the filter regularly to ensure optimal and safe performance
  •  Do not use this product in a small, enclosed space such as a closet. Poor ventilation could result in overheating or fire.
  • Do not insert fingers or other objects into the air inlet of our outlet. Not only is the internal fan running at high speeds, there is also an increased risk of deadly electrical shock.
  • Power off the dehumidifier and empty the water bucket before attempting to move the dehumidifier.
  • Remove the power plug from the wall outlet if the product will not be sued for extended periods.
  • If the product makes a strange noise or emits a strange or smoky smell, immediately remove the power plug and contact customer service for the next steps.
  •  Use this appliance only in a well-ventilated area. Inadequate ventilation during operation may reduce the oxygen level in the air.
  •  Never unplug the unit by pulling on the power cord. Always grip the plug firmly and remove it straight from the power outlet.
  • Turn off the dehumidifier and remove the power plug before cleaning or maintenance. Wait for the fan to stop moving.
  •  Do not operate the dehumidifier without a filter.

Technical Specs

Tosot SCWA-4006 Ultrasonic Humidifier Manual fig 1

Humidifying volume will change according to the changes in indoor temperature and humidity levels. If using water that is colder than room temperature the humidifying volume will be lower than the volume noted in technical specs. The volume should increase as the water temperature reaches room temperature.

Parts List

Tosot SCWA-4006 Ultrasonic Humidifier Manual fig 2

  1. Decorative Ring
  2. Transfer Pipe
  3. Water Tank
  4. Mist Reinforcement
  5. Mist Outlet Cover
  6. Mist Outlet
  7. Water Gauge
  8. Float
    Tosot SCWA-4006 Ultrasonic Humidifier Manual fig 3
  9. Filter
  10. Water Cover Subassembly
    Tosot SCWA-4006 Ultrasonic Humidifier Manual fig 4
  11. Water Channel
  12. Air Outlet
  13. Water Tank Light
  14. Button
  15. Float Plate
  16. Supporter
  17. Atomizer
  18. Light Ring
    Tosot SCWA-4006 Ultrasonic Humidifier Manual fig 5
  19. Carbon Filter
  20. Fragrance Box
  21. Fragrance Sponge
  22. Bottom Cover
  23. Power Adapter

If the structure diagram of the product is subject to change without prior notice. Please refer to the actual product.


Button/Light Functions
Tosot SCWA-4006 Ultrasonic Humidifier Manual fig 6


This Model SCWA-4006 Ultrasonic Humidifier is equipped with an aromatherapy function. To use, press in the aromatherapy fragrance box and remove from unit. Add a few drops of your selected fragrance to the fragrance sponge and then slide the fragrance tray back into the humidifier. Do not add fragrance or essential oils directly into the water tank. This can damage the internal components and will immediately void the manufacturer warranty of your humidifier.

Night Light
Under working status, long press and hold the button for 2 seconds to turn the nigh light in the tank on or off. Please check the table above for more information about the functions of the night light and button.

How Ultrasonic Humidifiers Work
The Ultrasonic Cool Mist Humidifier is designed to quietly provide visible cool moisture. Water is released from the water tank into the transducer nebulizer where it is turned into a fine visible mist through the action of ultrasonic sound waves. The mist is then propelled into the air by a small fan providing relief from discomfort caused by dry air.

Using Your Humidifier

  1. Use both hands to remove the water tank from the base of humidifier unit. If the water tank contains water, you may need to place your second hand on the bottom to support the water tank after removing from base.
  2. Remove the mist outlet cover from the top of the water tank and fill with water.
  3. After filling the water tank, place the water tank back onto the base of the humidifier.
  4. Reinstall the mist outlet cover, taking care to align the notch of the mist outlet cover within the groove on the water tank. The mist outlet can be rotated 360 to choose the optimal mist direction for your needs.
  5. Press the button on the front of the humidifier to select the proper mist volume.
  6. If the light ring is white, your humidifier is good to go! If light ring is red, you need to add more water to the water tank.

The optimal relative humidity level is anywhere within 40-60% RH. Relative humidity levels above 60% RH may increase the chance of mold or mildew growth. You may need to purchase a hygrometer to accurately measure the relative humidity setting in your home.

Cleaning and Maintenance

Maintenance Checklists
Pre-Season Maintenance Checklist

  • Check the power cord for any cuts or exposed wiring
  • Empty and clean the water tank, dry after cleaning
  • Remove and clean the carbon air filter, dry after cleaning

Long-Term Storage Checklist

  • Unplug humidifier from power outlet and wrap up power cord
  • Empty and clean the water tank, dry after cleaning
  • Remove and clean the carbon air filter, dry after cleaning
  • Wrap and/or cover the unit to prevent the accumulation of dust
Types of Water

Depending on the water treatment methods in your local area, water added from the tap may be rich in calcium, magnesium, or other hard minerals. After using the humidifier, some of these minerals may collect on or inside your humidifier in the form of a white, sometimes powdery, substance. For this reason, we commend that you use distilled water in your humidifier to limit the buildup of these hard-mineral deposits.

Carbon Filter

Located on the bottom of your humidifier is a black, sponge-like material which is the carbon filter for the air intake. This filter may attract large quantities of dust or other debris from the surrounding air after continued use, depending on your local environment. The atomizer, water tank, and water channel should be cleaned weekly.


If your humidifier is not function properly please check the below table for the issue and solution. Please contact if you have any additional questions or the issue you are experiencing is not listed.

Tosot SCWA-4006 Ultrasonic Humidifier fig 4

Tosot SCWA-4006 Ultrasonic Humidifier fig 5

Frequently Asked Questions

To view the complete list of frequently-asked questions, please visit

How do I know the humidity level in my home?
This humidifier is not equipped with a digital hygrometer to measure the humidity level in your home. Optimal humidity levels are 40-60% relative humidity. Humidity levels greater than 60% can lead to growth of mold and mildew, while humidity levels below 40% can cause skin dryness/irritation, respiratory system discomfort, and buildup of static electricity. In physical objects, low humidity levels can cause wood furniture or trim to shrink and drywall to crack.

Can I use this humidifier for aromatherapy treatment?
This humidifier (Model SCWA-4006) is equipped with a tray for aromatherapy, fragrances, or essential oils. However, do not add scented oils or anything but water to the water tank, as this may degrade the internal components and will void your manufacturer warranty.

TOSOT Direct



Leave a Reply