1.What is relative humidity?
The relative humidity is the amount of water vapor that is in the air. It is a percentage of how much moisture the air could possibly hold.

2.What is the ideal humidity level for my home?
Indoor relative humidity that is either too low or too high can lead to handfuls of problems.
The ideal relative humidity level for health and comfort is between 45% and 50%.
Indoor relative humidity above 50% creates a breeding ground for mildew, mold, dust mites, and bacteria.
Indoor relative humidity below 30% increases the likelihood of the spread of cold and flu viruses.

3.How to clean the water tank?
Prepare the items listed below before cleaning:
1. Distilled White Vinegar
2. A soft brush, like a toothbrush or a piece of clean cloth
Step 1: Begin by unplugging your humidifier and emptying all remaining water;
Step 2: Fill the water tank with 1 cup of water and 1 cup of white vinegar and leave it to sit for 20-30 minutes; (The vinegar is a natural cleanser and it'll help loosen any residue and disinfect the small unit)
Step 3: Empty the water tank, then use a vinegar-soaked cloth to wipe down the interior and allow it to air dry.
Step 4: Reassemble How many square feet does this humidifier cover? The Coole 08 humidifier can cover up to 215 ft² (20㎡).

4.Is it possible to use essential oils with this humidifier?
Yes, you can add a few drops into the built-in aroma tray and the oil will naturally vaporize throughout the room.

5.How do I add water to this humidifier?
The Coole 08 humidifier features a top-refill design. Simply pour in clean water from the top of the water reservoir to fill your humidifier.

6.How often will I need to refill my humidifier?
The Coole 08 humidifier has a 4L large water tank, vastly reducing the burden of filling water.

7.Can I set this humidifier on a timer?
Yes, the Coole 08 humidifier allows you to program operation to shut off at a certain time in order to save energy.