Can a Humidifier Cause Pneumonia Vector Illustration

Can a Humidifier Cause Pneumonia? (2024)

by | Updated: Apr 29, 2024

As we strive to create comfortable environments in our homes and offices, the use of humidifiers has become increasingly common.

These devices, meant to maintain optimal indoor humidity levels, are often touted for their health benefits, such as alleviating dry skin and sinus issues.

However, it’s essential to consider the potential health risks they might pose.

One question that has generated considerable debate is whether a humidifier can cause pneumonia.

Can a Humidifier Cause Pneumonia?

A humidifier does not directly cause pneumonia. However, if not properly maintained, it can disperse harmful microorganisms and minerals into the air. Breathing in these contaminants can potentially increase the risk of respiratory infections, including pneumonia, especially in those with compromised immune systems. Regular cleaning and using distilled or demineralized water can reduce these risks.

Can a Humidifier Cause Pneumonia Illustration

How Can a Humidifier Cause Pneumonia?

Using a humidifier in itself does not cause pneumonia. However, certain conditions related to its use can increase the risk:

  • Contaminated Water: If the water used in the humidifier is not clean, it can introduce harmful bacteria and other microorganisms into the air. When inhaled, these can lead to respiratory infections.
  • Improper Maintenance: Not cleaning the humidifier regularly can result in mold and bacteria growth inside the device. When the humidifier is on, these contaminants can be dispersed into the air.
  • Excessive Humidity: Overuse of a humidifier can make indoor air too damp, promoting mold growth and dust mites in the environment. Breathing in mold spores can cause respiratory issues.
  • Compromised Immune System: Individuals with weakened immune systems, such as the elderly, infants, or those with certain medical conditions, are more susceptible to infections from airborne pathogens.

To mitigate these risks, it’s crucial to use distilled or purified water, clean the humidifier regularly, and monitor indoor humidity levels, ensuring they stay between 30-50%.

How Does a Humidifier Work?

A humidifier adds moisture to the air to increase indoor humidity levels. It works by drawing water from a built-in reservoir.

Depending on the type, it may use ultrasonic vibrations, evaporative wicks, or steam generation to convert this water into a fine mist or vapor.

This mist or vapor is then released into the surrounding air, raising the humidity. Proper humidity levels can improve comfort, reduce dry skin and respiratory issues, and protect wooden furnishings from drying out.

Tips for Properly Maintaining Your Humidifier

Proper maintenance of your humidifier ensures it functions efficiently and safely. Here are some tips to keep it in top condition:

  • Regular Cleaning: Depending on usage, clean your humidifier every 2-3 days to prevent microbial growth.
  • Use Distilled or Demineralized Water: This reduces mineral deposits and the risk of dispersing harmful microbes into the air.
  • Empty Unused Water: Don’t let water sit in the tank for extended periods. Empty and refill it before each use.
  • Replace Filters Regularly: If your humidifier has a filter, follow the manufacturer’s recommendations on when to replace or clean it.
  • Check for Mold: Examine the tank, water tray, and other components regularly for any signs of mold or mildew.
  • Clean with the Right Agents: Use a mix of white vinegar or hydrogen peroxide for cleaning; they can help in removing scale and disinfecting the unit. Always rinse thoroughly.
  • Keep the Area Dry: Ensure the area around the humidifier remains dry to avoid mold growth. If it’s damp, reduce the setting.
  • Avoid Over-Humidifying: Use a hygrometer to measure room humidity. Aim to keep it between 30-50%.
  • Regularly Inspect the Cord and Plug: Look for signs of wear or damage to prevent electrical issues.
  • Store Properly: If you’re not using your humidifier for an extended period, clean it, dry it thoroughly, and store it in a dry place.Follow Manufacturer’s
  • Instructions: Always consult the user manual for specific maintenance instructions related to your humidifier model.

Regular maintenance ensures that the device works efficiently and minimizes risks associated with mold and bacteria.

What is Pneumonia?

Pneumonia is an inflammatory condition of the lung affecting primarily the small air sacs known as alveoli. Typically, the alveoli fill with fluid or pus, making it difficult to breathe.

Pneumonia lungs alveoli illustration labeled


Pneumonia can be caused by a variety of organisms, including:

  • Bacteria: The most common being Streptococcus pneumoniae.
  • Viruses: Such as influenza virus, respiratory syncytial virus (RSV), and the coronavirus responsible for COVID-19.
  • Fungi: Certain types, like Pneumocystis jirovecii, can cause pneumonia, especially in people with weakened immune systems.
  • Mycoplasma: Organisms that have characteristics of both bacteria and viruses.

Signs and Symptoms

Common symptoms include:

  • Cough, which may produce greenish, yellow, or even bloody mucus.
  • Fever, sweating, and shaking chills.
  • Shortness of breath.
  • Chest pain that fluctuates with breathing (pleuritic pain).
  • Fatigue and muscle aches.
  • Nausea, vomiting, or diarrhea.


  • Physical Examination: Listening to the lungs might reveal areas where sound is diminished or crackles are heard.
  • Chest X-ray: Used to confirm the diagnosis and determine the extent and location of the infection.
  • Blood Tests: To check for the presence of bacteria or to assess the overall health of the patient.
  • Sputum Test: Mucus sample from the lungs can be analyzed to determine the causing agent.
  • Pulse Oximetry: Measures the oxygen level in the blood, as pneumonia can prevent lungs from delivering oxygen to the blood efficiently.


  • Bacterial Pneumonia: Typically treated with antibiotics. The choice of antibiotic depends on the nature of the bacteria and the patient’s health.
  • Viral Pneumonia: Antiviral medications can be used, depending on the causative agent.
  • Fungal Pneumonia: Treated with antifungal medication.
  • Supportive Care: Includes rest, hydration, and over-the-counter pain relievers to manage fever and pain.
  • Oxygen Therapy: For those experiencing difficulty breathing.
  • Hospitalization: Severe cases, or those in high-risk groups, may require hospitalization for more intensive care.

How to Avoid Pneumonia

Avoiding pneumonia involves a combination of healthy practices and preventive measures. Here’s how you can reduce your risk:

  • Get vaccinated: Receive the recommended pneumonia and flu vaccines.
  • Practice good hygiene: Wash hands regularly with soap and water or use hand sanitizers.
  • Maintain a healthy lifestyle: Eat a balanced diet, exercise regularly, and get adequate sleep.
  • Avoid smoking: Tobacco damages the lungs and increases susceptibility to infections.
  • Limit exposure: Stay away from sick individuals, especially those with respiratory illnesses.
  • Wear masks: In crowded or potentially contaminated areas, wearing a mask can reduce exposure to pathogens.
  • Use humidifiers wisely: Ensure they’re cleaned regularly and use distilled or purified water.
  • Stay updated: During flu season or outbreaks, follow public health advice and guidelines.
  • Manage chronic conditions: Diseases like diabetes or asthma can increase pneumonia risk; keep them well-managed.
  • Avoid excessive alcohol: Overconsumption can weaken the immune system and increase the risk of aspiration.

Remember: While these measures can significantly reduce the risk of pneumonia, they can’t eliminate it entirely. Always seek medical attention if you exhibit symptoms of pneumonia, such as high fever, cough with phlegm, chest pain, or difficulty breathing.

Can a Humidifier Help with Pneumonia?

Yes, a humidifier can help with pneumonia symptoms by adding moisture to the air. Moist air can soothe irritated airways, reduce coughing, and ease breathing difficulties associated with pneumonia.

It also helps in keeping the respiratory tract’s mucous membranes moist, facilitating better mucus clearance and potentially aiding in recovery.

However, it’s crucial to maintain the humidifier properly to avoid introducing contaminants into the air. Always consult a healthcare professional about the best supportive care during a pneumonia illness.

Best Humidifier for Pneumonia

The Everlasting Comfort Ultrasonic Cool Mist Humidifier is touted as one of the best for pneumonia patients.

Our Top Pick
Everlasting Comfort Ultrasonic Cool Mist Humidifier

A high-quality cool mist humidifier for improved wellness, comfort, and breathing in your home.

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With its advanced ultrasonic technology, it efficiently disperses a cool mist that can alleviate the discomforts of dry, irritated airways.

Boasting a large capacity tank, it offers continuous operation without frequent refills.

Its whisper-quiet operation ensures undisturbed rest, while the built-in filter ensures cleaner mist distribution. Ideal for those seeking respiratory relief, this humidifier combines performance with ease of use.

Precautions When Using a Humidifier for Pneumonia

If you’re using a humidifier as supportive care for pneumonia, consider the following precautions:

  • Clean Regularly: Ensure the humidifier is cleaned every 2-3 days to prevent mold and bacteria growth.
  • Use Distilled or Demineralized Water: This minimizes the risk of dispersing harmful microbes or mineral deposits into the air.
  • Monitor Humidity Levels: Use a hygrometer to ensure room humidity stays between 30-50%. Over-humidification can promote mold growth and worsen respiratory issues.
  • Empty Unused Water Daily: Don’t let water sit in the tank. Refill with fresh water before each use.
  • Position Wisely: Place the humidifier at least a few feet away from the bed or sofa to avoid over-humidification of a particular area.
  • Replace Filters: If the humidifier has filters, change or clean them as per the manufacturer’s guidelines.
  • Avoid Additives: Refrain from adding essential oils or medicated products unless the humidifier is designed for them. Some can cause respiratory irritation.
  • Check for Mold: Regularly inspect for any signs of mold or mildew in and around the humidifier.
  • Use in Ventilated Rooms: Ensure the room is well-ventilated to maintain balanced humidity levels and prevent the buildup of contaminants.
  • Consult Healthcare Professionals: Before using a humidifier as an adjunct for pneumonia treatment, seek advice from a doctor or respiratory therapist.

Ensuring proper precautions can maximize the benefits of the humidifier while minimizing potential risks.

FAQs About Humidifiers and Pneumonia

Can a Humidifier Worsen Pneumonia?

A humidifier itself doesn’t worsen pneumonia. However, if not maintained correctly, it can introduce harmful bacteria and mold into the air.

Breathing in these contaminants can exacerbate symptoms or hinder recovery. Ensure regular cleaning and use distilled water to minimize risks.

Can Sleeping with a Humidifier Give You Pneumonia?

Sleeping with a humidifier does not directly cause pneumonia. However, if the device is dirty or uses contaminated water, it may release harmful microorganisms into the air, increasing the risk of respiratory infections.

Should You Use a Dehumidifier When You Have Pneumonia?

Using a dehumidifier can help reduce high humidity levels that promote mold and bacterial growth, potentially worsening respiratory issues.

However, overly dry air can also irritate the lungs. Striking a balance by maintaining indoor humidity between 30-50% is recommended.

Does Humidifier Help Clear the Lungs?

Yes, a humidifier can help clear the lungs. Moist air from the humidifier can soothe irritated airways, aid in better mucus clearance, and reduce coughing, making breathing easier, especially in respiratory conditions.

Will a Humidifier Help Break Up Mucus?

Yes, a humidifier can assist in loosening mucus. Moistened air can help keep the respiratory tract’s mucous membranes hydrated, facilitating the thinning and expulsion of mucus, especially during respiratory illnesses or dry conditions.

How Long Does Humidifier Fever Last?

Humidifier fever, caused by breathing in contaminants from poorly maintained humidifiers, typically manifests a few hours after exposure and can last 24-48 hours.

Symptoms usually resolve on their own once the source of exposure is eliminated. However, it’s essential to consult a healthcare professional if symptoms persist or are severe.

Can a Humidifier Cause a Lung Infection?

If not properly cleaned and maintained, a humidifier can disperse harmful microorganisms and minerals into the air.

Breathing in these contaminants can increase the risk of respiratory infections, including lung infections.

Is High Humidity Bad for Pneumonia?

High humidity can promote the growth of mold, bacteria, and other pathogens, potentially worsening respiratory symptoms.

For pneumonia patients, it’s advisable to maintain indoor humidity levels between 30-50% to balance comfort and minimize potential irritants.

Can a Humidifier Make Chest Congestion Worse?

If a humidifier is improperly maintained, the contaminants dispersed into the air can exacerbate chest congestion.

However, when used correctly with clean, distilled water, a humidifier can help alleviate chest congestion by moistening the airways and facilitating mucus expulsion.

Can a Humidifier Make a Cough Worse?

A dirty humidifier can release mold, bacteria, and minerals, potentially irritating the airways and worsening a cough.

But, a well-maintained humidifier can soothe the throat and reduce coughing by providing moistened air.

Can a Cool Mist Humidifier Cause Pneumonia?

A cool mist humidifier itself does not cause pneumonia. However, if not regularly cleaned or if filled with contaminated water, it can introduce harmful microorganisms into the air, increasing the risk of respiratory infections.

Can a Warm Mist Humidifier Cause Pneumonia?

A warm mist humidifier, like its cool mist counterpart, doesn’t directly cause pneumonia.

The main concern is the water quality and maintenance of the device. If contaminants are present and dispersed into the air, they can elevate the risk of respiratory issues.

Can Using a Humidifier in a Child’s Room Cause Pneumonia?

Using a humidifier in a child’s room doesn’t directly cause pneumonia.

However, if the device isn’t properly maintained or uses contaminated water, it can release harmful microorganisms into the air, potentially increasing the risk of respiratory infections in children due to their developing immune systems.

How Often Should I Clean My Humidifier?

To ensure optimal function and safety, clean your humidifier at least every 2-3 days, depending on usage. If you notice any buildup or contamination sooner, clean it immediately.

Always refer to the manufacturer’s instructions for specific cleaning guidelines related to your humidifier model.

Related: The Best Humidifiers for Lung Health

Final Thoughts

While humidifiers don’t directly cause pneumonia, improper maintenance can turn these beneficial devices into potential health hazards.

Regular cleaning and use of distilled or demineralized water can prevent the release of harmful microbes and minerals into the air, reducing the risk of respiratory infections, including pneumonia.

As we continue to use these devices to improve our comfort and health, we must also be vigilant about their maintenance to protect ourselves and our loved ones.

John Landry, BS, RRT

Written by:

John Landry, BS, RRT

John Landry is a registered respiratory therapist from Memphis, TN, and has a bachelor's degree in kinesiology. He enjoys using evidence-based research to help others breathe easier and live a healthier life.


  • Byber K, Radtke T, Norbäck D, Hitzke C, Imo D, Schwenkglenks M, Puhan MA, Dressel H, Mutsch M. Humidification of indoor air for preventing or reducing dryness symptoms or upper respiratory infections in educational settings and at the workplace. Cochrane Database Syst Rev. 2021 Dec 10
  • [Internet]. Cologne, Germany: Institute for Quality and Efficiency in Health Care (IQWiG); 2006-. Pneumonia

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