Should You Try a Cool Mist Vs. Warm Mist Humidifier? Experts Explain
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If you’re looking to soothe allergy symptoms, common cold symptoms, or simply make the air you breathe more comfortable in a dry climate, learning about cool mist vs warm mist humidifiers is key to finding the best humidifier for you and your family. Humidifiers either use warm mist or cool mist to add moisture to the air—each with pros and cons.
“A humidifier can help if there’s dryness in the air and that dryness is a trigger. For example for some, dry air can make their asthma and sinus/allergies worse whereas for some humidity can trigger it. This can be helpful in winter when heaters make the air more dry,” explains Purvi Parikh, M.D., an allergist with the Allergy & Asthma Network.
There are two types of humidifiers: Cool mist and warm mist. And while the type you choose ultimately comes down to personal preference, according to Michael Yong, M.D., board-certified otolaryngologist (ENT) and fellowship-trained neuro-rhinologist at Pacific Neuroscience Institute in Santa Monica, CA, “there are some different features of warm and cool mist humidifiers which may or may not be better for things independent of nasal symptoms,” including safety, noise, and more.
Here, experts break down the pros and cons of each type so you can choose the best humidifier for your specific needs.
Meet the experts: Purvi Parikh, M.D., an allergist with the Allergy & Asthma Network; and Michael Yong, M.D., board-certified otolaryngologist (ENT) and fellowship-trained neuro-rhinologist at Pacific Neuroscience Institute in Santa Monica, CA.
Cool mist humidifiers
Most of the humidifiers you’ll find on the market today are cool mist humidifiers, which have a few different ways of operating, but in general are the safest option (especially if you have children or pets around), according to the U.S. National Library of Medicine.
Below, Dr. Parikh and Dr. Yong break down the pros and cons of cool mist humidifiers.
Cool mist humidifier pros
May help calm coughs and other cold symptoms
May slightly cool the overall room temperature
Considered the safest to use around children and pets
Cool mist humidifier cons
May be noisier than warm mist humidifiers
May harbor and dispense mold, dust mites, and bacteria if not cleaned properly
Types of cool mist humidifiers
Dr. Yong explains that cool mist humidifiers can work in two different ways:
Evaporative cool mist humidifiers. These humidifiers use a fan to add moisture to the air.
Ultrasonic cool mist humidifiers. Using physical sonic energy or vibrational sound energy, Dr. Yong notes, these humidifiers produce a cool mist that adds moisture to the air.
Warm mist humidifiers
Warm mist humidifiers, also known as vaporizers, use electricity to heat water inside the tank and produce a warm mist to add moisture to the air. According to the United States Environmental Protection Agency (EPA), these humidifiers pose a lesser threat of dispersing bacteria into the air. However, they are generally not recommended for use around children and pets as the hot water and steam can be a safety risk.
Below, Dr. Parikh and Dr. Yong shares the pros and cons of warm mist humidifiers.
Warm mist humidifier pros
Maya help elevate overall room temperature in colder months
Are often quieter than cool mist humidifiers
Pose a lesser threat of dispensing allergens and bacteria into the air
Helps soothe nasal passageways
Warm mist humidifier cons
Not recommended for use around children and pets
Types of warm mist humidifiers
When it comes to warm mist humidifiers, they most often function as a vaporizer. The humidifier heats the water in its tank with an electrical heating element, producing hot steam that then exits the machine to humidify and slightly warm the air, Dr. Yong explains.
Which type of humidifier is better: Cool mist vs. warm mist?
According to experts, both types of humidifiers are equally effective at adding moisture to the air in your home and reducing symptoms of colds and allergies. Luckily, there are options on the market that combine both cool and warm mist options, which might be the way to go if you have trouble deciding—like the Levoit LV600S Smart Hybrid Ultrasonic Humidifier which was a winner in Prevention’s 2023 Health at Home Awards.
While personal preference will help you determine which is right for you (especially when you take into account various unique features like humidity readings, auto-shut-off, etc.) experts agree that it’s more important to consider how easy it is to clean, its size, and ability to add humidity to your room or home.
Additionally, “Make sure you speak to your physician first to make sure it is a good idea for you, especially if you suffer from asthma and allergies,” Dr. Parikh explains.
LV600S Smart Hybrid Ultrasonic Humidifier
LV600S Smart Hybrid Ultrasonic Humidifier
amazon.com
$109.99
LevoitWarm Mist Humidifier
Warm Mist Humidifier
amazon.com
$39.97
VicksHumidifier Plus
Humidifier Plus
amazon.com
$255.00
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