What Water Should You Use in Your Humidifier?

Choosing the right water for your humidifier is one of the most important things you can do to prevent mineral and scale buildup. While convenient, tap water contains minerals that can cause buildup on your humidifier. On the other hand, distilled water is free from these minerals and contaminants, making it the best option for humidifiers. Regular use of distilled water also reduces the frequency and intensity of maintenance required for your humidifier, ensuring efficient operation. 

Why Does Water Type Matter for Your Humidifier? 

Choosing the right kind of water for your humidifier is more than just a matter of preference—it affects the device's performance, longevity, and quality of the mist you breathe.  

The performance of a humidifier largely depends on the kind of water it processes. Using tap water, which often contains high levels of minerals, can cause white dust to accumulate. This white dust is not only a nuisance to clean but is also a sign that your humidifier might be working harder than it needs to be. The mineral content in tap water can also cause scale buildup inside the humidifier, requiring more frequent and rigorous cleaning and maintenance. 

Common Types of Water Used in Humidifiers 

Tap Water 

This is the most accessible option for most people, but it's not always the best choice for your humidifier. Tap water typically contains minerals that can lead to the buildup of white dust in your home and scale within the device, necessitating more frequent cleaning. However, specific humidifiers, like Levoit’s Superior 6000S, are specially designed to be okay for use with tap water. Always check the manufacturer’s recommendations before using tap water and proceed only if the manual explicitly states that tap water can be used. 

Bottled Water 

It might seem like a convenient and safe alternative to tap water, but bottled water also often contains minerals unsuitable for humidifier use. The mineral content varies widely among brands, and some may be as high in minerals as tap water, posing similar issues with mineral deposits and white dust. 

Spring Water 

While natural and often marketed for its healthy mineral content, there are better choices for humidifiers than spring water. Like tap water, the minerals that make spring water beneficial for drinking can contribute to the white dust problem and scale buildup in humidifiers. 

Reverse Osmosis Water 

Reverse osmosis water undergoes a filtration process that removes many of the impurities and minerals found in tap water. This makes it a much better option than tap or spring water for humidifiers, as it minimizes the risk of mineral buildup and white dust. If you have a reverse osmosis system correctly installed and properly operating, or are considering getting one, this could be an alternative to using distilled water in your humidifier. 

Distilled Water 

Distilled water is often recommended as the best for humidifiers due to its purity. The distillation process removes minerals and impurities, making distilled water the optimal choice to prevent white dust and scale buildup. This can help extend the life of your humidifier and maintain a cleaner indoor air environment. 

High Mineral Content & White Dust 

Though cost effective, tap water typically contains minerals, such as calcium and magnesium, left behind when water evaporates from your humidifier. This mineral residue manifests as a white dust that can settle on furniture, electronics, and other surfaces in your home.   

While tap water is a convenient and seemingly inexpensive option for your humidifier, its high mineral content could pose significant issues. Opting for distilled or purified water can help avoid these problems, ensuring your humidifier functions efficiently. 

Maintenance Tips: Cleaning Your Humidifier & Preventing Bacteria and Mold 

1. Unplug: Always start by unplugging your humidifier. 
2. Empty and Rinse: Empty any standing water from the tank and base. Rinse these components with clean water to remove any residue or film.
3. Use Natural Cleaning Agents: Use white vinegar and water for a deep clean. Fill the tank with this solution and let it sit for at least 30 minutes. Vinegar is effective at breaking down mineral deposits and disinfecting without harsh chemicals.
4. Scrub and Sanitize: After the vinegar solution has done its work, scrub the tank and any other parts with a soft brush to remove buildup. A small amount of baking soda can act as a gentle abrasive for areas with stubborn mineral deposits.
5. Rinse Thoroughly: Rinse all parts thoroughly with clean water to ensure no cleaning solution remains.
6. Dry Completely: Ensure all parts are completely dry before reassembling to prevent immediate microbial growth. It can be effective to leave components to air dry or wipe them down with a clean towel.
7. Replace Filters Regularly: If your humidifier uses a filter, follow the manufacturer's guidelines for replacement. Filters can harbor bacteria and mold, reducing air quality and humidifier efficiency.