How To Fill A Humidifier

A humidifier is a device that increases the humidity of air in your home. 

Humidity helps prevent dry skin, chapped lips, and other health problems related to dryness. 

Use a humidifier for cold or flu when you need more moisture in the air or during hot weather when it’s difficult for sweat to evaporate from your body. 

There are many different types of humidifiers, but these devices all have one thing in common – they need water! 

This post will teach you how to fill a humidifier with water. Knowing this will help you avoid mistakes and damage your humidifier when filling it with water.

Do You Fill Humidifiers with Water?

Yes, you can fill your humidifier with water. However, you should always use distilled water for your humidifier. 

Tap water can contain minerals that will build up in the machine and cause it to malfunction. What’s more, it may develop mold inside the device, which is unhealthy! 

If you don’t want to buy distilled water all the time (which can be expensive), then just run tap water through a filter first before putting it into your humidifier. 

This may take away some vital components from the liquid, but you are getting rid of any impurities. You’ll also save money on buying more supplies.

The most common type of humidifier used in households today uses evaporative technology.

How Full Should You Fill a Humidifier?

When it comes to humidifiers, there’s no one definitive answer to the question of how full you should fill them. Depending on the type of humidifier and its design, different filling methods may be more or less effective.

You should keep humidity levels in your house at around 30% to 50%. A hygrometer that you can find at most hardware shops may be used to assess the degree.

If the humidity is below 30% in your home, you should buy a humidifier. This helps with sore throats, blood noses, and dry skin.

If you have a humidifier without filters, you’ll want to fill it until the water level reaches just below the “max” line. 

If your humidifier has a tank with a gauge indicating how much water is present, ensure that the gauge reads between halfway and three-quarters full.

If you don’t have a gauge on your humidifier, it’s probably best to err on the side of filling up too much and not enough until you know exactly how your particular model works. 

If there is no “max” line, then fill it to the top with cool tap water for safety purposes.

You’ll need to replace that water daily or twice a day, depending on how many people live in your home and their usage habits (such as showers). 

Generally, if humidity levels drop below 50%, add more water. Above 70%, remove some water to keep the overall humidity at about 40%. 

It may be necessary to refill daily during dry winter months when heating systems are running almost constantly.

Stop when the water level reaches just below the max line or until you can see that it’s about half full. 

Avoid overfilling your humidifier because there is a risk of causing major damage with too much pressure on the appliance.

Place your cool-mist humidifier on a flat surface since this will help prevent any issues caused by the uneven distribution of moisture throughout your home. 

If you’re using ultrasonic humidifiers, avoid placing them near anything that could be harmed by excess vibrations, such as bookshelves and TVs. 

Ensure they are also protected from pets or kids that might knock them over accidentally.

How To Fill a Humidifier – General for Most Humidifiers – Step-by-Step

If you’re interested in knowing how to fill a humidifier, we’ve got you covered. Here is a step-by-step guide on how to do it correctly.

  1. First, make sure the humidifier is unplugged and empty. Next, fill the tank with water up to the line that indicates the maximum capacity. If you’re using distilled or filtered water, you don’t need to add any additional chemicals. However, if you’re using tap water, you’ll want to add a few drops of hydrogen peroxide to kill any bacteria in the water.
  2. Second, place the tank back on top of the humidifier and check to ensure it’s secure.
  3. Thirdly, take the water and fill the humidifier’s base. This is the part that will distribute mist into your room. Ensure you maintain a level of around one to two inches, and if it’s too low, you can add more water until the level reaches that point.
  4. Fourth, plug in the humidifier and turn it on. Leave it running for about an hour so that the new water can mix with the old water and reach its full potential. Once an hour has passed, check the humidity level in your room and adjust accordingly. You may need to keep adding more distilled or filtered water as needed depending on the humidity level in your area.
  5. Finally, place a clean towel under the humidifier to catch any drips from an overflow tank should one occur (it won’t happen unless there isn’t enough water). 

That’s it! You now know how to fill a humidifier and can get started on keeping your home at a comfortable humidity level.

How to Fill a Vicks Humidifier – Step by Step

If you have a Vicks humidifier, it’s also very easy to fill it with water. Here is what you need to do:

  • First, you need to find the water tank. It should be located on top of your humidifier, and it is transparent so that you can see how much water is left there. This will also help you gauge if it’s time for a refill or not, as the emptier the tank gets, the less mist will come out from your humidifier. 
  • The next step is to remove this lid/cover by gently lifting it and pulling it towards yourself until you hear a click sound, which means it has been appropriately unplugged. Use both hands when doing to avoid dropping anything accidentally. 
  • Once inside, tilt over your humidifier and let all the water out. This will ensure that you leave no traces of water in there, which can lead to mold or other damage to your device once it gets plugged back in again. 
  • After you are done, take this lid/cover and fill your tank with fresh cool tap water until it reaches its maximum capacity (indicated on the side). 
  • Finally, make sure both parts fit well together by putting them one after another. 

If they don’t seem like they want to stay connected properly, then chances are something went wrong during the refilling process. 

So, try taking everything apart again and follow these instructions more carefully next time around! Once filled, plug it back into an outlet but do not turn it on just yet.

You should allow it to sit there for about 20 minutes to eliminate any air bubbles that might be floating inside the tank. 

They could have formed while you were filling it up with water, causing your humidifier not to release mist into the room anymore. 

Finally, press this button or switch to turn it on and enjoy! 

You can also try using these simple tricks if you have problems keeping humidity levels at their desired level. 

Positioning your humidifier near a window where another heat source is coming from (such as sunlight) will help keep its temperature high enough. 

This will prevent the moisture produced by evaporated water from condensing back into liquid form again before reaching the air quality sensor located around the device.

How to Fill a Humidor Humidifier – Step-by-Step

Humidor humidifiers are a great way to keep your space in perfect condition. 

Not only do they add humidity to the air, but they also help regulate the humidor’s temperature. 

This section will show you how to fill a humidor humidifier step-by-step.

Step One: Remove the cap from the humidifier and fill it with distilled water until it is full. Make sure that you do not overfill it, as this could cause water to leak out.

Step Two: Replace the cap on the humidifier and place it in the humidor.

Step Three: Allow 24 hours for the humidifier to absorb enough moisture before using it. Once activated, you will need to refill it every 30 days.

Step Four: If your humidor is not in a high traffic area, you only need to refill it once per month or as needed. Typically, if the humidity level in the container falls below 70 percent for an extended period, you should add water to the device.

Step Five: Make sure you keep the humidifier full at all times. You can add distilled water to it or use a few drops of purified water if the humidor is not in high traffic area. 

Do not overfill this device as it could cause leakage and damage your container.

How to Fill a Safety First Humidifier – Step by Step

If you have a Safety 1st humidifier, here is how you should fill it:

  1. First, remove the tank from the humidifier. Be careful not to spill any water on yourself or furniture.
  2. Then, use a pitcher to fill the tank with room-temperature water. You can also use cold water, but it may take longer for the humidifier to reach its full capacity.
  3. Next, reattach the tank to the humidifier and replace the cap. Make sure that it is tightly sealed before putting it back in place.
  4. Finally, plug in your humidifier and turn it on by switching the cord. The light will turn green when it has been turned on correctly.
  5. The Safety First Humidifier is an easy-to-use appliance that helps increase moisture levels in your home. 

You can ensure that your humidifier is always full and ready to go by following these simple steps.

Mistakes to Avoid when Using Humidifiers

Using humidifiers can result in many mistakes. Unfortunately, some people don’t know how to avoid them. 

Luckily, we’ll show you some of the mistakes you need to avoid when using humidifiers in this section. They include:

  • Leaving the humidifier on when you’re not home: The one important rule to remember about using a humidifier is that you cannot use it when no one is in the house. This is because there’s no way to monitor its usage. If your schedule changes, so should the amount of water that goes into the device. If this isn’t changed, you’ll waste any humidity created by the unit due to lack of use.
  • Not changing or cleaning out water before adding more for continuous operation: While people would like their machines to run continuously without interruption during cold months, they also need them filled with fresh water at all times just in case someone decides to take a shower and uses up the content of what was put inside prior.
  • Filling up the humidifier with hot water will create more steam: However, it can also damage the machine over time and isn’t necessary to produce more humidity in a room.
  • Not calibrating your humidifier’s output: Humidifiers come calibrated from the factory. But if you find that yours doesn’t seem to be putting out enough moisture, then calibration could help fix this issue. Ensure you follow your unit’s instructions on how to do so.


Knowing how to fill a humidifier is vital for keeping your home’s air healthy and moist. 

By following the simple steps outlined above, you can easily fill your humidifier and keep your family healthy and comfortable.

I hope you’ve learned a lot from everything we’ve written in this post. If you have any questions or feedback, please feel free to reach out through email, and we’ll be happy to help.