Do You Put Salt in a Humidifier?

Have you ever heard about putting salt in a humidifier? It might sound crazy, but it’s actually a great solution to control excess moisture because salt can absorb water molecules from the surrounding environment. This can, in turn, help reduce humidity levels and prevent mold growth. 

However, it’s essential to use caution when trying this method. Not all humidifiers are designed to handle salt, and they can cause excessive damage if used incorrectly. 

In this article, I will dive deep into the benefits and process of adding salt to a humidifier and how it all works.

Do You Put Salt in a Humidifier?

Benefits of Adding Salt to Humidifier

Before adding salt to your humidifier, let’s first understand why someone would want to do so in the first place.

The addition of salt can help reduce the growth of bacteria and other harmful microorganisms. It provides cleaner and safer moisture for individuals with breathing difficulties or allergies. 

Additionally, salt can aid in softening hard water and prevent mineral buildup on the humidifier’s internal components, increasing its lifespan. 

However, excessive use of salt in a humidifier can lead to increased corrosion or damage to certain materials, such as plastic components or metal coils. 

It is recommended to only add small amounts of table salt or specialized humidifier salts specifically designated for this purpose. 

Increased Humidity

In the winter, increased humidity can provide many benefits, including relief from dry throat and skin, allergies, and sinus problems. 

Adding salt to a humidifier can further enhance these benefits by increasing the air’s moisture content. 

As the humidifier releases water vapor into the air, the added salt helps to break down the mineral particles in the water. 

This creates smaller droplets that are easily absorbed by the skin and respiratory system. 

However, it is important to note not all humidifiers are compatible with adding salt, so it is crucial to read manufacturer instructions before attempting to do so.

Improved Air Quality

The addition of salt to a humidifier can have several benefits in improving indoor air quality. 

Salt can help to reduce the growth of bacteria and other contaminants in the water reservoir, preventing their release into the air. 

Salt also has natural anti-inflammatory properties, which can help soothe symptoms of irritation caused by nasal congestion or sore throats. 

When salt is vaporized along with the water, it can create negatively charged ions that bind with airborne pollutants and allergens. 

It effectively neutralizes them and makes them easier to filter out of the air. 

The release of these negative ions can also help to improve respiratory function by reducing inflammation and promoting better oxygen absorption in the lungs. 

However, it is important to note not all types of humidifiers are compatible with salt additives. I will cover this in a later section.

Reduced Static Electricity

The use of a salt humidifier has proven to be an effective way to reduce static electricity in the environment. 

Adding salt to the water increases the conductivity of the water vapor produced. 

The heightened conductivity allows for static electricity to be dispersed efficiently, preventing it from building up on surfaces and causing unwanted reactions. 

By reducing static electricity levels, the use of a salt humidifier improves air quality and promotes comfortable living conditions. 

Additionally, this can benefit electronic equipment by minimizing electromagnetic interference caused by static buildup, thus increasing their lifespan and overall performance. 

Enhanced Aromatherapy

In recent years, there has been an increasing interest in enhancing the effects of aromatherapy through the use of humidifiers. 

By diffusing water vapor into a room and releasing negative ions from the salt, these devices can help to purify the air and reduce allergens. Essential oils in your humidifier also provide therapeutic benefits. 

These humidifiers are particularly useful in dry environments, as they replace moisture lost from heating and cooling systems. 

The addition of a salt lamp further amplifies the soothing effects of aromatherapy. 

This allows the people in the room to relax and breathe more deeply while enjoying sweet fragrances or calming scents. 

Studies have shown exposure to negative ions has a range of positive effects on mood, energy levels, and overall well-being. 

Together with essential oils, salt humidifiers can provide relief from stress and promote relaxation by creating a peaceful atmosphere.

Tip! Check out my personal selection of Best Humidifiers for Hard Water

Things to Remember Before Putting Salt in a Humidifier

When considering the appropriate use of salt in a humidifier, it is important to remember not all humidifiers are compatible with salt. 

Depending on the type and model of your particular device, adding salt may actually damage the unit or cause other issues. 

Additionally, using too much salt can lead to an overly salty mist being released into the air, which may irritate the eyes, nose, and throat. 

It is also essential to consider any health conditions or allergies that may be affected by increased levels of sodium in the air. 

In short, before adding salt to your humidifier, always read the manufacturer’s instructions carefully.

Also read: What Kind of Water is Best to Use in a Humidifier?

Steps to Add Salt to a Humidifier

When adding salt to a warm humidifier, it is important to use the appropriate type and amount of salt. 

First, ensure the humidifier is empty and unplugged before beginning the process. 

Use non-iodized sea salt or kosher salt as they do not contain any additives that can harm the humidifier’s function. 

The amount of salt needed will vary based on the size of your humidifier and the desired level of humidity in your space. 

Generally, for every gallon of water in your humidifier, it is recommended to add 1-2 teaspoons of salt. 

However, it is always best to consult your owner’s manual for specific instructions from the manufacturer. 

Once you have added the necessary amount of salt, stir until it has completely dissolved before turning your unit back on. 

Regular maintenance by cleaning and properly following usage instructions will aid in maintaining good air quality.

Related article: What Should I Set My Humidifier To?


Although it may seem counterintuitive, adding a small amount of salt to your humidifier can actually provide several benefits. First and foremost, salt helps to purify the air by killing bacteria and other harmful microorganisms that may be present in the water. Since saltwater has a lower evaporation point than plain water, adding salt can increase its efficiency. 

So while salt might not be the first thing that comes to mind, it indeed can be a surprisingly effective tool for controlling humidity!

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