difference between dehumidifier and humidifier

Difference Between a Humidifier and a Dehumidifier

Are you unsure of the difference between a dehumidifier and a humidifier? Dehumidifiers remove moisture from the air while humidifiers add moisture, so understanding the technology behind both can help you make an informed decision about the right appliance for your home.

Quick Summary

  Discover the Key Differences Between a Dehumidifier and Humidifier

Humidifiers and dehumidifiers are both devices used to regulate the humidity of an environment. A humidifier adds moisture to the air by releasing water vapour, while a dehumidifier extracts moisture from the air. In other words, a humidifier increases the humidity level, while a dehumidifier decreases it.

Humidifiers are often used in dry climates to add moisture to the air and alleviate dry skin, nosebleeds, and other conditions caused by dry air. Dehumidifiers, on the other hand, help reduce the level of moisture in the air, preventing mold and mildew buildup and reducing dust mites.

In addition to the purpose of these two devices, there are also differences in the way they operate. Humidifiers use cooling systems to evaporate water, while dehumidifiers use refrigerant coils to condense moisture from the air.

The differences between humidifiers and dehumidifiers should be taken into account when deciding how to regulate the humidity of an environment. A humidifier is best for dry climates, as it adds moisture to the air. A dehumidifier, meanwhile, is often the better option for damp climates, as it reduces the amount of moisture in the air.

Discover the Key Differences Between a Dehumidifier and Humidifier

Dehumidifiers and humidifiers are both useful and popular household appliances, but they often get confused with each other. Although both can fight dry air in your home, knowing the difference between dehumidifiers and humidifiers is important for proper use. Learn more about the difference between dehumidifier and humidifier.

What is a Dehumidifier?

A dehumidifier is an appliance specifically designed to reduce humidity in a room or space, usually by using a refrigerant. The machine is designed to detect and measure the relative humidity of a room and then use a fan to **** moisture from the surrounding area to reduce the relative humidity.

What is a Humidifier?

A humidifier is an appliance designed to increase humidity in a room or space. It works by adding water directly to the air, increasing the relative humidity of the room. This maintenance helps to keep moisture in the air, and can prevent dryness that can cause discomfort and health concern, such as sinusitis.

Key Differences Between a Dehumidifier and Humidifier

  • A dehumidifier reduces the humidity in a room, while a humidifier increases it.
  • Dehumidifiers use a refrigerant to reduce humidity, while humidifiers release water vapor to increase it.
  • Dehumidifiers can help reduce allergens and prevent mold and mildew, while humidifiers can help keep the air moist, reduce irritation, and soothe sore throats.
  • Dehumidifiers are best used in hot, humid climates, while humidifiers are best used in cold, dry climates.


Knowing the difference between a dehumidifier and a humidifier can help you make a more informed decision when looking to improve the air quality in your home. With the right appliance, you can keep the air in your home comfortable, and help keep your family healthy.

Personal Experience

What is the difference between humidification and dehumidification?

Having a dehumidifier and a humidifier in your home is a must to ensure the right temperature and humidity throughout the year. It is important to understand the difference between these two appliances if you are considering to buy one.

The essential role of a dehumidifier is to reduce the indoor humidity and will make the air cooler. The indoor air is moved into the dehumidifier by the fan, then the humidity is absorbed by the refrigerant. The moist air will then be released back into the room, creating a drier and cooler atmosphere. This is helpful for those who have dust mite allergies, as the dry atmosphere will discourage dust mites from residing.

A humidifier, on the other hand, is designed to increase indoor humidity. Humidifiers increase the moisture level in the air by evaporating water into the air. This process requires a fan, filter, and water. Humidifiers are very beneficial in winter, as it can ease symptoms resulted due to extra-dry air, such as sinus congestions, rashes, sore throat, nosebleeds, and more.

When making the decision between a dehumidifier and a humidifier, it is important to consider your needs based on the environment and the seasons. Both appliances are very beneficial, depending on the air quality in your home.

Frequently Asked Questions

What is the difference between humidification and dehumidification?

The main difference between humidification and dehumidification is that humidifiers increase the relative humidity of the air by introducing moisture, while dehumidifiers lower the relative humidity by removing excess moisture from the air. Humidifiers are often used in wintertime to combat the dry air, while dehumidifiers are used when there is an excessive amount of moisture in the air, such as in areas that are humid or prone to mold and mildew infestation.

Should I sleep with a humidifier or dehumidifier?

It is generally recommended to sleep with a humidifier, as low humidity levels can not only make the air uncomfortable, but also dehydrate skin, mouth, and nasal passages. Using a humidifier at night can help to keep the air moist, prevent dry skin, and provide relief from congestion and other respiratory issues. Dehumidifiers are not typically recommended for sleeping purposes, but rather for removing excess moisture from the air in smaller, contained spaces as needed.

Is a humidifier or dehumidifier better for runny nose?

For a runny nose, a humidifier is generally considered the better choice. Humidifiers help add moisture to the air, which can reduce sinus congestion and allow for easier breathing. A dehumidifier, on the other hand, will reduce humidity levels in the air and can make breathing more difficult. It can also worsen symptoms of a runny nose, so it’s generally not recommended.

Can a humidifier also dehumidify?

Yes, a humidifier can also be used to dehumidify a space. Certain humidifier-dehumidifier combos have the ability to switch between humidifying and dehumidifying functions. By adjusting the humidity controls, these machines can reduce the amount of dehumidification, making them a great option for controlling the humidity of a space.

Do I need a humidifier or dehumidifier for allergies?

The best way to determine whether a humidifier or dehumidifier is needed for allergies is to check the room’s humidity level. If the air is below 43% humidity, a humidifier may be the better option. On the other hand, if the air’s humidity is higher than that, a dehumidifier may be a better choice. It is always a good idea to consult with a doctor or allergist to best determine the right choice for your individual needs.

Is a dehumidifier good for people with allergies?

Yes, a dehumidifier is beneficial for people living with allergies. It reduces the presence of mold, mildew, and dust mites in the home, which in turn can help minimize allergy symptoms. Dehumidifiers are easy to use and can help create a more comfortable and healthy living environment.

Can a dehumidifier make allergies worse?

No, a dehumidifier cannot make allergies worse. In fact, a dehumidifier can help reduce the severity of allergies by removing moisture from the air and reducing the chance of mold growth. Allergies are triggered by airborne particles like pollen and dust, and dehumidifiers filter these particles out, making air easier to breathe.

What is better for allergies humidifier or air purifier?

Air purifiers are better for allergies as they effectively remove allergens such as dust, mold, pet dander, and more from the air. Humidifiers may provide some symptom relief but they are not as effective at removing specific allergens that can trigger allergic reactions. Therefore, an air purifier is the better solution for alleviating allergy symptoms.

Should I use a humidifier or dehumidifier for baby?

The answer is that it depends on the humidity levels in the baby’s room. If the room is too humid, then a dehumidifier should be used to maintain balance. However, if the room is too dry, then a humidifier is recommended to promote a comfortable environment for the baby. Additionally, babies are more sensitive to dry air than adults, so a humidifier should be used to ensure an appropriately balanced environment.

Are dehumidifiers OK for babies?

Yes, dehumidifiers are safe and beneficial for babies. With up to 90% effective particle retention, dehumidifiers help control humidity levels and eliminate living conditions for pests, making the air clean and comfortable for babies. Dehumidifiers also help ensure the overall health and wellness of the entire family.

Do doctors recommend humidifiers for babies?

Yes, doctors recommend humidifiers for babies. The American Academy of Pediatrics (AAP) recommends the use of a cool mist humidifier, as it is believed to be safer than vaporizers, which can cause burns. Humidifiers help add extra moisture to the air, making them a great tool for helping infants with breathing difficulties or other respiratory problems.

Why do people buy humidifiers for babies?

People buy humidifiers for babies to help protect their skin, breathing and overall health. Dry air can cause nose and throat irritation, skin issues, and can even make it harder to sleep. A whole-home humidifier adds extra moisture to the air, allowing babies to breathe easier, stay more comfortable, and feel healthier throughout the cold winter months.

Final Thoughts

A humidifier and dehumidifier are two separate pieces of equipment that can be used to maintain an optimal humidity level in a household. The primary difference between the two is that a humidifier increases the humidity level, while a dehumidifier decreases it. Both can be beneficial to maintain a comfortable environment while aiding in the prevention of bacterial and mold growth. Depending on the users needs, either one can be the best choice.