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What is the Difference Between Humidifier and Dehumidifier?

It’s common for people to search for the difference between a humidifier and a dehumidifier, especially those who are buying these home devices for the first time. These devices are very useful at increasing the humidity or moisture in your home all throughout the year.

So, which of these two devices can work best for you? The humidifier works by improving moisture in the air, which is very useful when it gets too dry or when the level of humidity goes below 35%. On the other hand, the dehumidifier works by taking moisture out from the air when it becomes too humid or when the humidity goes beyond 50%.

The ideal level of humidity in every house is around 35% to 45%. Keeping the level of humidity in your home in this range can help maintain a healthy and comfortable environment. This keeps your home protected from damage resulting from excessive humidity or dryness.

To decide what’s best for your home, it’s important to know the difference between humidifier and dehumidifier. Also, before you start shopping for this device, find out the level of humidity in your home using a humidity reader also known as a hygrometer.

What is a Humidifier?

A humidifier is necessary during winter since the air during this time tends to get very dry. If you don’t improve the level of humidification in your house at this time, the air can get extremely dry and this can lead to problems like chapped lips, dry sinus, nose bleed.

Furthermore, dry air often results in static electricity that could pose danger to the electronic devices in your house. When the air is dry, more energy will be required for the room to be heated.

In this case, the humidifier can help increase humidity in your home to a level you desire in order to address the issues mentioned above. The humidifier can also help address symptoms as a result of hay fever, flu, and cough since it can maintain the desired level of humidity in the surrounding. This can help asthma sufferers to breathe easily.

What is a Dehumidifier?

There are instances when your home can get very humid. In this situation, the dehumidifier can help lower the level of humidity. A high level of humidity can lead to various health issues, not to mention facilitating the growth of mold and other germs that could ruin your furniture and belongings.

If left untreated, this can make your house a breeding ground for pests, insects, etc. Having an extremely high level of humidity in your home can also trigger allergic reactions in your house.

Aside from causing issues in your health, a high level of humidity could cause damage to your belongings too. For instance, the wooden furniture and fixtures could deteriorate faster as a result of the high moisture level.

The dehumidifier is a very important device for damp conditions as it could effectively control the percentage of relative humidity in your surroundings and prevent many issues from taking place.

When to Use Them?

You generally would want to get a humidifier during the winter or when the weather condition is very cold. It’s because there’s often a limited amount of moisture in the air when the weather is cold and the level of humidity is generally low during this time.

Having a good humidifier during these periods is very useful. This can help improve the level of humidity and prevent any negative effects resulting from having extremely dry air.

In the event of extreme rain, the dehumidifier can be very useful. Usually, when there’s rain, the level of moisture increases. On the other hand, warm air brings in more moisture. This is why a dehumidifier is very useful if the climate in your area is humid or warm.

To understand what device you should use, it is best to regularly check the readings of your environment using a thermostat or hygrometer. So, whenever you notice that the moisture level increases or decreases, you will know whether to use a humidifier or a dehumidifier.

Operation Mode

The biggest difference between humidifier and dehumidifier is the mode of operation. Generally, a humidifier is equipped with a tank as well as an atomizer plate that will convert the water in the tank into a cool or warm mist to be eventually dispersed into the air.

Certain models also come with filters that can eliminate minerals and bacteria from the tank. As for the dehumidifier, the device works by drawing the first air into the grill opening using a fan.

Then the coolant will remove the humidity or moisture from the air. The air that’s free from moisture will then be supplied back into the environment using a different opening.

While you occasionally need to refill the humidifier’s tank with water, the tank must be emptied on a regular basis. Finally, it has been proven that it takes the humidifier less time to release moisture towards the atmosphere compared to a dehumidifier.

How Can Moisture Affect the Respiratory System?

If you’re suffering from respiratory problems, the overall air quality in your surroundings will play a huge role in the symptoms’ severity, the level of comfort that you’ll feel and how fast the condition will be healed.

Both dehumidifiers and humidifiers come with useful features that can help improve your respiratory conditions. The best way to know which of the two devices is right for you is to determine when moisture is required and whether it must be decreased.

If you are suffering from allergies, the dehumidifier might work best. Usually, when you breathe dry air, the mucus that’s a result of the allergic response in your body will dry up faster. If the level of moisture is high, this could trigger the growth of mildew and mold and can make the symptoms of allergies even worse.


Now that you have an idea about the difference between humidifier and dehumidifier, you should be able to easily decide what to buy for your house. Both these devices can help improve the overall quality of air in your surroundings.

But the type of device to buy should mainly depend on the level of moisture inside your house at a certain period of time. So, use a hygrometer or thermostat to accurately measure the moisture level in your surroundings.