Choose Dehumidifier Or Humidifier?

how to Choose dehumidifier

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If you want to know what is better, humidifier or dehumidifier? Then read this article till the end. A dehumidifier removes moisture from the air, causing it to become drier. A humidifier adds moisture to the air, causing it to become moister. Humidifier is the best choice in dry, dusty conditions. Deumidifier is the best option in humid environments.

People are usually aware of the importance of controlling humidity or dryness of the air. However, many of them don’t take the necessary steps to prevent the situation from getting out of hand. Both a humidifier and a dehumidifier can help people avoid problems with air through removing or adding humidity that can interfere with production, thus helping to maintain a good environment in offices and at home as well. When selecting the right unit, it is important to ensure that you have enough space for it, and it will be able to fit in the area needed.

Which One to Choose?

Air Conditioner helps prevent overheating during the summer and the heater helps prevent cold in the winter. In a climate-controlled room, the temperature is regulated.

There are many industries where humidity or dry air can be a problem, such as printing and plastic production, metal and woodworking, paper-processing, textiles, food processing, and storage of perishable goods, and many others.

Which one to choose, a dehumidifier or a humidifier? Mainly depends on the humidity level you desired.

Importance of Dehumidifier

Dehumidifiers are used to remove unwanted moisture. They cool the air (to a certain extent) by evaporation (with refrigerant) and thus reduce the possibility of mold growth, which can damage the perishable items you store. The condensation function helps to make sure the air never gets too dry, and ensures the cooling effect to maximize.

Dehumidification may lead to a decrease in the risk of various respiratory and allergic diseases. For example, studies that assessed indoor air quality showed that dehumidifying rooms by as much as 45% reduced the risk of asthma attacks by 40% and respiratory infections by 25%.

Importance of Dehumidifier

Some of the largest manufacturers of electronics, construction materials, and other products use dehumidifiers in their manufacturing process. For example, the building industry uses dehumidifiers to help maintain their equipment as well as the health of the workers. The electronics industry uses dehumidifiers to keep the solder joints on all of the components of their products moist level and to keep drying the electrical connections between components and circuit boards drying, which can avoid short circuits. The construction industry uses dehumidifiers because they help to keep dust, sand, and other particles from accumulating on the inside of windows and doors.

For many industries, water is an even more important factor than temperature. The water must be in the correct humidity level to function correctly in their products, and a dehumidifier will keep the air at the desired humidity level.

There are lots of Dehumidifiers that are very helpful to control the amount of moisture in your space and they will help prevent the spread of diseases. The most common way is to use dehumidifiers in the basement.

Benefits of Dehumidifier

1. Dehumidifier is more cost-effective when used to control mold, bacteria, and fungi growth in commercial buildings or homes which prevents disease transmission.

2. Dehumidifier is used to eliminate moisture from indoor air. When humidity levels are too high, the moisture can worsen the effect of a number of diseases and health problems.

3. Dehumidifier can reduce diseases. People can suffer from respiratory problems, headaches, and fatigue if the moisture levels are too high while the air quality can also be affected. Moisture can also be harmful to the structural integrity of the buildings and fixtures within them.

4. Dehumidifier can protect furniture and clothes. Humid weather will damage furniture, home appliances, books, medicines, food, etc. When the indoor humidity drops, it will protect them from damage, and it can also dry clothes

Humidifiers Types

Humidifiers are divided into two categories:

1.Ultrasonic Humidifier

Working principle: the water is atomized by ultrasonic vibration, then the atomized water molecules are brought into the indoor air by a fan.

Advantages: uniform and rapid humidification, low power consumption, and long service life.

Disadvantage: it is foggy and has higher requirements for water quality. Better use pure water, because the chlorine molecules in the tap water will enter the air.


Composition with an air humidifier and a set of aromatic oils.

Ultrasonic Humidifier

2. Evaporative Humidifier

Working principle: completely solve the white powder phenomenon by removing the calcium and magnesium ions in the water. The air is washed through the water curtain, and while humidifying, it can also filter and purify the bacteria, dust and particles in the air, and then moisten it with a pneumatic device. Clean air is sent to the room, thereby increasing the humidity and cleanliness of the environment.

As the water is purified, no generated white mist, so it has a certain effect of purifying indoor air, disinfecting and sterilizing, so it’s very suitable for families with children and the elderly.

However, its price is generally more expensive than the ultrasonic humidifier, also you will spend a cost to replace the filter element in the future.

You need to select the humidifier according to the area of ​​use.

The greater the humidifier efficiency, the larger the humidification area. Please refer to this range: 200~400ml/h for ordinary desktops, 400~700ml/h for bedrooms, and 700ml/h or more for living rooms.

Humidifiers are usually very quiet. In addition, in terms of sterilization, its humid water vapor is easier to breed bacteria. Additional functions such as ion sterilization, blue light sterilization, photocatalyst, and silver ion sterilization have a good effect on inhibiting bacteria as well.

Evaporative Humidifier

Advantages of Humidifier

For private houses, humidifiers provide more comfortable sleeping, better indoor air quality, and increased energy efficiency.


1. A lower operating cost than air conditioners.

Because they make their own water rather than consuming electricity to produce. For this reason, humidifiers are used by large and small water-using enterprises as well as by households and public utilities.

2. More comfortable working and living environment.

As they can be used to keep the air in rooms at 50~70% relative humidity. Reliable energy efficiency, which results in saving energy costs.

3. Avoid respiratory diseases.

Dry air can cause itching and discomfort in the respiratory tract, especially for the elderly and children, which can easily cause respiratory tract infections such as bronchitis and emphysema. Humidifiers can improve air quality, and moist air passes through the respiratory tract, effectively avoiding the occurrence of respiratory diseases.

4. Eliminate static electricity.

Humidifier makes the air moist, thereby reducing static electricity, and people can also have pleasant contact and communication in winter.

5. Moisturizes the skin and improves sleep.

While the humidifier replenishes the moisture in the air, it allows the air to take away the moisture and attach to the skin, moisturize the skin, and prevent the skin from drying out.

Adding sleep-promoting aromatherapy and essential oils to the humidifier can effectively improve sleep quality.

Same Between Dehumidifier And Humidifier

Dehumidifier is more effective in removing moisture, but it doesn’t create humidity in a space. Humidifier is just the opposite.

The space needs to have a balanced system that keeps the moisture in the room but keeps it from becoming too dry.

Both dehumidifier and humidifier are helpful in keeping the suitable atmosphere of a space moist and warm.

Difference Between Dehumidifier And Humidifier

1. Application

Humidifier is an appliance that increases the humidity in a room, suitable for dry seasons, such as winter.

Dehumidifier is an appliance that reduces the humidity in a room, suitable for humid seasons, such as summer and rainy seasons.

2. Working principle

The (ultrasonic) humidifier uses ultrasonic high-frequency vibration at 1.7MHz frequency to atomize the water into ultrafine particles of 1-5 microns, creating a comfortable environment.

For dehumidifier, the fan draws moist air into the machine and passes through the heat exchanger. At this time, the water molecules in the air condense into droplets, and the treated dry air is discharged out of the machine. This cycle keeps the indoor humidity at an appropriate relative humidity.

Can Use Humidifier and Dehumidifier Together?

Don’t use them at the same time, because the functions of the two products are opposite.

Dehumidifier used to reduce the humidity, but humidifier used to increase the humidity.

Dehumidifier vs Humidifier

How To Choose Correct Dehumidifier?

When choosing an appropriate dehumidifier, we advise the checklist: room size, room humidity level, and air temperature.

The humidity level of a room depends on the amount of moisture in the air that is present in the room. A small room will have a lower humidity level than a large one or a room with lots of people. Humidity level will also be higher in a room with a high air temperature.

For a high-quality dehumidifier, it must be energy efficient. This means it will save money on electricity bills. This savings can be passed onto the customers.

Dehumidifier Save Energy


Many people may be interested to purchase a dehumidifier for their air conditioner because it will prevent their air conditioner from breaking down. It will also make their family members healthier as the air in the room will be free from all moisture which will prevent colds and illness.

As such, a dehumidifier will keep the air conditioner working efficiently and help you to save on maintenance costs and energy bills.

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About Author

Vic Cheung
Vic Cheung

Hi, I'm Vic! Start working in HVACR field since 2008, our main products included: air conditioning, cold room refrigeration system, water chiller, ice machine, commercial dehydrator, dehumidifier, heat pump, electric motor, and all accessories. Since joined China Speedway Group in 2012, I worked in here more than 10 years, as the general manager of export department, we have established 50+ agent in different countries and areas.
As our experience and strong technical support, we can solve your issue once you have, and our chief engineer has worked in HVACR field since 1997. I am so proud of our knowlege is more and more popular not only for engineer, and for HVACR business new comer, DIY lovers. Hope you are enjoying our articles, if any question or comments just welcome to send me marketing at

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