Choosing a Humidifer
Use a humidifier if the humidity in your home is less than 30%. The ideal indoor humidity level is between 30% and 50%. Get a hygrometer, which is a tool that measures humidity, to see what your home’s humidity level is. If it’s less than 50%, you have dry air, so go ahead and use a humidifier. If the air in your home is too dry, you’re more likely to catch respiratory infections like the cold or the flu, which can make your asthma symptoms worse. Dry air can also cause dry skin, a sore throat, and other respiratory symptoms.
Have a central humidifier installed for the most effective option. Central humidifiers, or whole-house humidifiers, are the most expensive type, and they rely on your home’s heating and cooling systems to humidify the air. That means you don’t have to worry about filling up a standalone unit. Hire an HVAC professional to install a central humidifier in your home.
Go for a steam-based humidifier to reduce germs. Steam-based humidifiers boil water to create steam. This means the water vapor is germ-free. However, these types can get pretty hot and the steam could burn you. Don’t leave young children unattended around a steam-based humidifier—they could get scalded.
Select an evaporative humidifier for an inexpensive option. Evaporative humidifiers are pretty cheap and easy to clean. They work by running water through a wet wick, which releases the water into the air, but not bacteria or minerals. However, you will need to change the filter frequently if you go with this type of humidifier.
Get an ultrasonic humidifier for a quiet, energy-efficient unit. Ultrasonic humidifiers use high-frequency vibration to turn water into mist. This means, though, that any minerals or bacteria in the water also get turned into mist, so it’s super important that you clean this type at least twice per week.
Opt for a dehumidifier if the humidity in your home is more than 50%. While dry air can make asthma symptoms worse, the same is true for air that has too much humidity. Use a hygrometer to measure the humidity in your home. If it’s too high, get a dehumidifier to draw water out of the air. Dust mites and mold thrive in really humid areas and can contribute to breathing problems. The humidifier can add too much moisture to the air, thus creating the perfect environment for dust mites to thrive. This exposure can cause nasal symptoms such as post nasal drainage, that in turn can lead to worsening asthma control.
Using a Humidifier Safely
Set the humidifier 4 feet (1.2 m) away from you. Choose a flat, stable surface with good air circulation. Set a waterproof mat or a towel on the surface before placing the humidifier on top of it. It’s especially important to keep the unit a few feet away from you if it’s a warm-mist humidifier to prevent burns.
Put distilled water in your humidifier. Tap water contains a lot of minerals, which can increase bacteria growth inside your humidifier. Additionally, if you use tap water in a humidifier, it will release these minerals into the air and you can breathe them in. Fill your humidifier’s water reservoir with distilled or even demineralized water to avoid these issues. Don’t overfill the humidifier! Stop adding water once you reach the fill line. If you notice fine white dust (from vaporized minerals) on any furniture or surfaces around the humidifier, turn it off right away. Clean the area as well as the humidifier.
Refill your humidifier every day. To keep the water as clean as possible, unplug your humidifier each day, then dump out the old water. Dry the humidifier, including the water tank, with a clean towel, then refill the unit with fresh, distilled water. Wipe up any spilled water on or around the humidifier to prevent water damage. A room humidifier uses about 1 gallon (3.8 L) of water each day.
Clean the unit twice a week. Humidifiers can easily increase bacteria and mold growth, which could worsen your asthma. Every 3 days or so, unplug the humidifier and dump out the water as usual. Then, clean the humidifier with 3% hydrogen peroxide to remove mineral deposits. Rinse and dry it before refilling it with distilled water. You can use distilled white vinegar as an alternative to hydrogen peroxide. It may seem like a pain to clean your humidifier so often, but it’s really important for your health!
Change the filter in the humidifier at least once a month. Each unit is different, so read the manual to figure out how often to replace the filter according to the manufacturer. Usually, you’ll need to change the filter every 30 days or so. Stock up on filters so you have them on hand and can swap them out frequently. Regularly changing the filter limits how much bacteria and mold are released into the air.
Avoid adding essential oils to your humidifier. While some humidifier models have spaces to add vapor rub or essential oils, don’t use these features! They release chemicals in the air that can worsen asthma symptoms or even cause respiratory illnesses.
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