Are there any health risks associated with using a humidifier?

Yes, there are some potential health risks to be aware of when using a humidifier. The stagnant water inside the tank can promote the rapid growth of mold, fungi, bacteria and other microorganisms. When dispersed into the air, these contaminants can cause ill health effects if inhaled or come into contact with lungs and airways. It’s essential to take proper precautions to minimize risks and safely operate your humidifier.

According to the Environmental Protection Agency (EPA), humidifiers can cause indoor air quality issues due to dispersing microorganisms, minerals, and other pollutants into the air if not properly maintained and disinfected.

Main Health Risks of Humidifiers

Mold and Bacteria Growth

The number one risk with humidifiers is microbial growth in the water tank. The warm, stagnant water provides ideal conditions for the rapid reproduction of mold, fungi, and bacteria such as pseudomonas species, serratia species, and nontuberculous mycobacteria (NTM).

When these microorganisms become aerosolized in the mist output by the humidifier, they can be easily inhaled. This puts you at risk for lung infections, hypersensitivity pneumonitis, “humidifier fever”, and other respiratory issues.

Babies, children, the elderly and those with compromised immune systems or lung diseases are most vulnerable to these health risks.

To prevent microbial growth, it’s crucial to:

• Clean and disinfect the tank daily
• Rinse and dry all parts after use
• Follow manufacturer guidelines for maintenance
• Use distilled or filtered water
• Keep humidity levels below 50%

Dispersion of Minerals and Sediments

Certain types of humidifiers, especially ultrasonic and impeller (cool mist) models, can disperse white mineral dust into the air. This comes from minerals naturally present in tap water that get extracted and atomized by the humidifier.

Inhaling the mineral dust particles can cause respiratory issues like:

• Coughing
• Congestion
• Asthma attacks
• Lung inflammation
• Increased infections

Children and those with pre-existing lung diseases are at higher risk. To reduce mineral dust, use distilled, demineralized or filtered water in your humidifier.

Excess Moisture and Allergies

Humidifying the air too much can create an environment inside your home that exacerbates allergies and asthma. High humidity promotes growth of mold, dust mites, and other allergens.

Additionally, breathing air that is too humid can make it more difficult for lungs to clear mucus in some individuals. This can trigger increased coughing, chest tightness, and wheezing.

Use a hygrometer to monitor humidity levels and keep your home between 30-50% relative humidity. Also monitor for any worsening allergy or asthma symptoms and adjust humidifier use accordingly.

Burns from Steam Vapor

Warm mist humidifiers work by heating water to produce steam vapor. This hot steam can cause burns if you come into direct contact with it.

Keep humidifiers out of reach from children to avoid accidental burns. Do not touch steam vents or attempt to handle or refill a warm mist humidifier while it is turned on and still hot.

Type of Humidifier	Main Associated Health Risks
Ultrasonic	Dispersion of mineral dust particles; Microbial growth
Impeller (Cool Mist)	Dispersion of mineral dust particles; Microbial growth
Warm Mist	Burns from hot steam vapor; Microbial growth
Evaporative	Microbial growth; Allergen accumulation on wicks

Tips for Safe and Proper Humidifier Use

When used with care, cleaned properly and maintained well, humidifiers can safely and effectively relieve dry air. Here are some tips for minimizing health risks:

Choose the Right Model

Consider the pros and cons of each humidifier type:

• Cool mist ultrasonic: Quiet and energy-efficient but can disperse mineral dust. Look for built-in filters.
• Warm mist: Provides soothing visible vapor but risk of burns. Disperses less mineral dust.
• Evaporative: Uses natural evaporation, less risk of dispersing minerals. But requires frequent wick changes.

Clean and Disinfect the Tank

Clean the tank thoroughly every day with a dilute bleach solution or vinegar and water mixture. Rinse well and allow all parts to dry completely between uses to prevent microbial growth.

Change Filters and Wicks

If your humidifier has a filter, replace it as often as recommended by the manufacturer. For evaporative models, change the wick frequently to avoid buildup of minerals and allergens.

Use Purified Water

Fill your humidifier with cool, distilled or demineralized water. This will prevent dispersion of minerals through the mist. Do not use untreated tap water.

Monitor Humidity Levels

Use a hygrometer to keep the humidity between 30-50%. Too high can promote microbial growth. Too low will make the air feel overly dry.

Allow Proper Clearance

Place the humidifier at least 2 feet away from walls, furniture, bedding and belongings. This prevents moisture damage like mold/mildew growth.

Follow Instructions

Carefully read and follow manufacturer directions for filling, cleaning, maintenance and cautions for safe operation.

Top Pick For Anti Microbial Humidifiers

PureGuardian H5450BCAView on Amazon

The Bottom Line on Humidifier Health Risks

Humidifiers can benefit health when used properly by relieving dryness and congestion. However, take precautions to minimize risks like:

• Clean and disinfect the tank daily
• Use purified water to reduce mineral dust
• Monitor humidity levels with a hygrometer
• Allow proper clearance from walls and furniture
• Choose models with antimicrobial and filtration features
• Be attentive to allergies or asthma getting worse
• Keep humidifiers out of reach of children

With attentive care and maintenance, you can safely add moisture to the air using a humidifier and avoid potential health hazards.

Are There Any Disadvantages to Using a Humidifier?

In short, yes there can be some potential downsides to using a humidifier. However, most risks can be avoided with proper maintenance and care.

Humidifiers work by increasing moisture levels in the air. This can help relieve issues caused by dry indoor air, such as static electricity, dry skin, sinus congestion, and more. But adding moisture also comes with some possible drawbacks that should be considered.

According to the EPA, the main potential risks of humidifiers include:

Mold growth	Dispersing minerals into the air
Bacteria buildup in stagnant water	Noise
Child safety hazards	Hard water residue

However, the EPA notes these risks can generally be avoided by following manufacturer instructions for cleaning and maintenance. Let’s look at each potential disadvantage in more detail:

A New Generation of Humidifiers That Clean the Water as they Humidify. PureGuardian H5450BCA Ultrasonic Warm and Cool Mist Humidifier UVC

Mold and Mildew Growth

One of the biggest concerns with humidifiers is increased mold and mildew growth. Mold spores thrive in damp environments. So if a humidifier raises moisture levels too high, it can create ideal conditions for mold.

The EPA recommends keeping indoor humidity under 50% to discourage mold growth. Anything over 60% for an extended time risks major mold issues. Using a hygrometer to monitor humidity levels is advised.

To help prevent mold with a humidifier:

• Don’t over-humidify rooms
• Change water daily
• Clean and dry tanks thoroughly
• Use distilled or filtered water
• Don’t let moisture build up on surfaces
• Check for leaks or standing water

Dust and Mineral Dispersion

Some humidifiers, especially ultrasonic and impeller types, can disperse minerals and dust into the surrounding air. This includes naturally occurring mineral dusts.

As the humidifier vaporizes water, small mineral particles get released. Using filtered or distilled water instead of tap water can help reduce this effect.

Bacteria Buildup in Stagnant Water

Stagnant water left sitting in a humidifier tank can breed bacteria and microorganisms. These then get blown out into the air by the humidifier.

To prevent bacteria growth:

• Change water daily
• Disinfect tank weekly
• Don’t let water sit for long periods
• Follow cleaning instructions

Noise

Some types of humidifiers, especially ultrasonic and impeller models, can produce bothersome white noise. This sound is created from high frequency vibrations that turn water into a mist.

The humming or buzzing may disrupt sleep if the humidifier is used in a bedroom. Look for units specifically designed to be ultra quiet or whisper silent.

Hard Water Residue

Hard water containing minerals like calcium and magnesium can leave behind white dust or scale around humidifiers. As the water evaporates, the minerals are left behind.

This harmless but unsightly residue can spread through the air. Ways to prevent it include:

• Use distilled or filtered water
• Use demineralization filters or cartridges
• Clean with vinegar or descaling solutions

Child Safety Concerns

Humidifiers can pose some risks to children if used improperly:

• Burns: Hot steam vapors from warm mist models can cause burns if touched directly.
• Tipping: Rowdy play may cause a floor unit to tip and spill. Place on sturdy surfaces out of reach.

Properly supervise children around humidifiers and keep floor units on low, sturdy surfaces.

Other Considerations When Choosing a Humidifier

To find the right humidifier and minimize risks, keep these factors in mind:

• Size and intended coverage area
• Noise levels, especially for bedroom use
• Convenience – how easy to fill, clean, and maintain
• Type of humidifier: warm or cool mist, evaporative, ultrasonic, etc.
• Any smart features like humidity sensors or auto shut-off

Also look for models with:

• Automatic shut off when empty
• Leak protection or overflow prevention
• Tip over protection
• Timer and humidity settings
• Antimicrobial materials that inhibit mold

Proper Care Is Key

While the potential risks may seem concerning, the key is proper maintenance and care of your humidifier.

Be sure to:

• Read all instructions and safety guidelines
• Change water daily or every few days max
• Rinse and scrub tanks to remove film
• Disinfect tanks weekly with bleach solution
• Dry out humidifier between uses
• Use filtered or distilled water
• Monitor humidity levels with a hygrometer
• Clean and replace filters regularly

With regular cleaning and care as directed, you can minimize any risks and safely enjoy the benefits of humidifier use.

The Bottom Line

There are some potential downsides to be aware of when using a humidifier:

• Mold growth in damp environments
• Dispersing minerals and dust into the air
• Bacteria buildup in stagnant water reservoirs
• Noise from some models
• Hard water residue
• Safety concerns around children

However, diligent cleaning, filtered water, monitoring humidity levels, and general precautions can minimize any risks.

While no device is risk-free, humidifiers can safely and effectively relieve the problems caused by dry air when used properly. With some care and maintenance, you can unlock all the benefits of humidifier use for your home or office.

Can a Humidifier Help With Dry Sinuses?

Yes, using a humidifier can help relieve dry, irritated sinuses by adding moisture back into the air. Dry sinuses are commonly caused by low humidity, cold dry air, indoor heating systems, and allergies – all of which remove needed moisture from the delicate nasal passages and sinus cavities. Humidifiers work by releasing a fine mist into the air to increase humidity levels, preventing moisture loss from the nose and sinuses. The added moisture helps thin out mucus secretions, open nasal airways, allow proper sinus drainage, and soothe inflamed nasal tissues caused by excessive dryness.

According to the Mayo Clinic, maintaining proper moisture in the nasal passages is key to reducing sinus irritation and inflammation.

What Causes Dry Sinuses?

Several factors can lead to dry sinuses, including:

• Low Humidity – Dry air pulls moisture from the delicate nasal passages and thin sinus membranes. Low humidity is most common in colder winter months when cold outdoor air holds less moisture. Running indoor heat also further dries out the air.
• Indoor Heating Systems – Forced hot air furnaces and heaters dry out the air, removing needed moisture from the sinuses. The constant blast of dry air irritates and inflames the nasal cavities.
• Allergies – Allergic reactions cause inflammation in the nasal passages, leading to swelling and blockages that prevent proper airflow. The congestion dries out the sinus cavities.
• Sinus Infections – Bacterial and viral sinus infections cause thick mucus and nasal congestion that blocks sinus drainage and airflow. The backed up mucus dries out and irritates the sinuses.
• Dry Climate – Living in dry, arid, and desert climates where the air contains little moisture can also dry out the nasal passages.

Cause	Effect on Sinuses
Low humidity	Pulls moisture from nasal membranes
Indoor heating	Hot dry air irritates nasal passages
Allergies	Inflamed, congested nasal tissues
Sinus infections	Congestion blocks sinus drainage
Dry climates	Chronically dry nasal membranes

Symptoms of Dry Sinuses

Dry sinuses can cause various uncomfortable symptoms, including:

• Nasal congestion and stuffiness
• Runny nose and post-nasal drip
• Nosebleeds
• Sore inflamed nasal passages
• Sinus pressure and pain
• Headaches
• Excessive dry mucous membranes
• Crusting inside the nose
• Reduced sense of smell
• Frequent sinus infections

If you experience chronic sinus dryness, pain, congestion, and irritation, it likely indicates overly dry nasal passages. Moistening the sinuses with a humidifier can help alleviate discomfort.

How Can a Humidifier Help Dry Sinuses?

Humidifiers work by releasing a warm or cool mist into the air to raise humidity levels in a room. This added moisture can provide relief for dry sinuses in several ways:

• Prevents Moisture Loss – Dry air pulls moisture from the sinus cavities. More humidity in the air helps prevent this moisture loss.
• Opens Nasal Airways – Added moisture loosens nasal congestion and shrinks inflamed membranes to open blocked sinus passages.
• Thins Mucus – Humidity helps thin out thick sinus mucus so it can drain properly.
• Soothes Irritation – Warm mist moisturizes and soothes irritated, inflamed nasal tissues.
• Allows Sinus Drainage – Opening nasal airways promotes ventilation and drainage of backed-up sinuses.
• Reduces Infections – Moisture helps clear congestion and prevents bacterial growth leading to infections.

For chronic sinus dryness, running a humidifier at night while sleeping or during the day in rooms where you spend the most time provides ongoing relief. The moist air constantly hydrates the nasal membranes.

Choosing a Humidifier for Sinus Problems

Look for the following key features when choosing a humidifier to help alleviate dry, irritated sinuses:

Warm Mist vs Cool Mist

• Warm mist – Provides soothing moist heat to relieve sinus congestion. Especially helpful for night use.
• Cool mist – Adds moisture without raising room temperature. Good for daytime use.

Tank Size

• 1 gallon (or more) tank – Provides extended runtime before needing refills. Good for all-day use.

Humidistat

• Adjustable humidistat – Lets you customize moisture output for ideal comfort. Aim for 30-50% humidity.

Auto Shut Off

• Auto shut off when tank is empty – Turns off unit to prevent damage if water runs out.

Other Helpful Features:

• Warm/cool mist options in one unit
• Direction mist control
• Built-in humidistat
• Essential oil tray
• Quiet operation

Best Humidifiers for Sinusitis Symptoms

Here are some top-rated humidifier models that can help relieve dry irritated sinuses:

Humidifier	Key Features
Levoit LV600TS See Price on Amazon	Warm and cool mist options 6L large tank capacity Touch controls with LED display Auto shut off Sleep mode
Dreo Smart Humidifier See Price on Amazon	App and voice controlled Customizable humidity output Auto shut off Built-in humidistat Essential oil diffuser
PureGuardian H5450BCA Ultrasonic Humidifier See Price on Amazon	Warm and cool mist options 1 gallon tank capacity Silver clean antimicrobial protection Adjustable humidistat Auto shut off

When shopping, look for models with features to best suit your needs. The above humidifiers provide both warm and cool mist, large tanks, auto shut off, humidstat controls, and other useful options to relieve dry sinuses.

Using a Humidifier Correctly

To get the most sinus relief from your humidifier, follow these tips:

• Use distilled or filtered water to prevent mineral buildup.
• Change the water daily to avoid mold and bacteria.
• Clean the tank and parts regularly as directed.
• Place on a flat, elevated surface, away from direct sunlight.
• Use a hygrometer to monitor humidity levels. Aim for 30-50% humidity.
• Turn off when humidity exceeds 50% to avoid overly damp air.
• Close doors and windows when running to maximize moisture distribution.
• Clean and dry before storage at end of humid season.

Proper maintenance is key to getting consistent performance and avoiding potential hazards like mold.

Signs of Excessive Humidity

While moderate humidity around 40-50% is ideal for alleviating sinus problems, too much moisture can cause issues like:

• Mold growth
• Bacteria accumulation
• Damp, sticky feeling
• Dripping windows and cold surfaces
• Increased dust mites
• Peeling paint or wallpaper
• Respiratory discomfort
• Musty odors

Use a hygrometer to monitor levels and reduce humidity if exceeding 50% for extended periods. Refrain from using a humidifier if you already have moisture issues in your home.

Conclusion

In summary, dry sinuses are often the result of low humidity, dry forced-air heating, and nasal irritants like allergies. This excessive dryness inflames and irritates the nasal passages. Using a humidifier is an effective way to add moisture back into the air to hydrate and soothe dry nasal tissues and sinuses. Look for features like warm mist, large tank capacity, and adjustable humidity control. Clean and maintain the humidifier properly for best performance. Monitor humidity to keep optimal sinus comfort and health. With the right humidifier, you can say goodbye to dry, painful sinuses for good!

 

Can I Use Tap Water in a Humidifier if I Have a Water Softener?

Using tap water treated by a water softener in a humidifier is generally safe, but proper maintenance is required to limit mineral deposits and bacteria growth that can occur in the softened water. The sodium ions from the water softener replace calcium and magnesium ions, resulting in soft water without the minerals that cause hard water deposits. However, the sodium and any other remaining minerals can still leave deposits over time.

The EPA recommends changing the water daily and disinfecting the tank regularly to control bacteria and limit mineral deposits in humidifiers using softened water. With proper precautions, the benefits of softened water in humidifiers outweigh the small risks.

How Do Water Softeners Work?

Water softeners are devices that remove minerals like calcium and magnesium from hard water by using a process called ion exchange. Here’s how it works:

• Hard water flows into the softener tank and passes through resin beads that are charged with sodium ions.
• The calcium and magnesium ions in the hard water swap places with the sodium ions on the resin beads.
• This effectively replaces the hard water minerals with sodium ions.
• The resulting soft water then flows out of the softener system without the troublesome hard water minerals.

So in summary, water softeners transform hard water into soft water by removing the calcium and magnesium ions and replacing them with sodium ions instead.

Hard Water	Soft Water
Contains calcium, magnesium ions	Contains sodium ions
Causes limescale buildup	No limescale buildup
Not recommended for humidifiers	Safe for use in humidifiers

The resulting soft water has no minerals that can cause limescale or hard water buildup. This makes softened water safer for use in appliances like humidifiers.

Concerns With Using Softened Water in Humidifiers

While softened water is preferable to hard water for use in humidifiers, there are some potential downsides to be aware of:

Mineral Deposits

Softened water still contains sodium and any other minerals that were not removed during the ion exchange process. Over time, these minerals can leave white dust or salt deposits in the humidifier known as fallout.

Too much mineral fallout can:

• Clog up the humidifier’s internal components and filters.
• Reduce the efficiency and output of the humidifier.
• Appear as white dust circulating in the air.

While not as severe as limescale buildup from hard water, sodium deposits can still be a nuisance and should be minimized.

Bacteria Growth

The lack of calcium and magnesium minerals in softened water means there is less to inhibit the growth of microorganisms like bacteria and fungi.

Studies have shown that softened water is more likely to allow bacteria like Pseudomonas aeruginosa to rapidly multiply inside humidifiers compared to untreated hard water.

When atomized into the air, these bacteria can cause illness if inhaled by people with compromised immune systems or respiratory issues. This is especially concerning in medical environments.

So using softened water means being extra diligent about disinfecting the humidifier to control microorganism growth.

Mitigating Concerns with Proper Maintenance

While softened water comes with some drawbacks for humidifiers, proper maintenance can help mitigate any potential issues with mineral deposits and bacteria:

• Change the water daily – Don’t allow water to stagnate in the tank. Daily changes will limit mineral buildup.
• Disinfect tank regularly – Follow manufacturer instructions to disinfect the tank and kill any bacteria growth. Vinegar, bleach, and humidifier cleaning solutions can be used.
• Rinse thoroughly – Always rinse thoroughly after cleaning to prevent any cleaning agents from atomizing into the air during use.
• Follow filter changes – Replace filters as specified to remove sediments and bacteria from the water. This improves efficiency and output.
• Use distilled or filtered water – For severe mineral issues, use bottled distilled or filtered water instead of softened water from the tap.

Proper humidifier hygiene is essential even when using softened water to prevent buildup and microbes.

Benefits of Using Softened Water in Humidifiers

While precautions need to be taken, there are several benefits that make softened water a better choice than hard water for household humidifiers:

• Prevents limescale buildup – The sodium ions in softened water will not leave mineral deposits on humidifier components like hard water does. This prevents costly limescale damage over time.
• Extends humidifier life – Without limescale buildup, the heaters, pads, and other parts will remain in working order longer before needing replacement.
• Easier cleaning – Mineral deposits rinse away much easier than limescale buildup which can require descaling. Less scrubbing saves time and frustration.
• Improves efficiency – Limited mineral buildup helps humidifiers run at peak efficiency for maximizing moisture output.
• Safer for environment – The lack of limescale buildup makes softened water less likely to breed hazardous mold and bacteria compared to distilled water.

While occasional white dust may form, the tradeoff of not dealing with hard water deposits makes softened water the best option for household humidifiers in most cases.

Choosing a Humidifier for Use With Softened Water

If you plan to use softened water, look for humidifier models designed to operate with tap water and that have features to help manage mineral deposits and microbes:

Levoit LV600S

• Large 1.5 gallon tank holds enough water to limit refills.
• Includes three mist levels for customized humidity.
• Built-in timer automatically shuts off when empty to prevent mineral deposits from dried water.

Dreo Smart Humidifier

• Uses ultrasonic technology for whisper quiet operation.
• Auto mode maintains ideal room humidity levels.
• Removable tank is easy to clean and disinfect as needed.

PureGuardian H5450BCA Ultrasonic Humidifier

• Silver Clean Protection inhibits up to 99.96% of bacteria growth.
• Warm and cool mist settings.
• Large 1.5 gallon tank capacity.

When shopping for a humidifier to use with softened water, look for large tanks, antimicrobial properties, and features that make cleaning and maintenance simple. This will help mitigate any risks of using softened water.

Daily and Weekly Maintenance With Softened Water

To keep your humidifier running in tip-top shape and avoid issues when using softened water, follow this maintenance routine:

Daily

• Empty tank and rinse with clean water
• Wipe down any exterior residue with soft cloth
• Refill with fresh softened water

Weekly

• Disinfect tank by filling halfway with 1:1 vinegar and water solution. Let soak 20 mins.
• Drain vinegar solution and rinse thoroughly.
• Wipe down exterior with cloth dampened with diluted vinegar solution.
• Rinse filter under tap water to remove sediment buildup.
• Refill with fresh softened water.

Monthly

• Inspect tank and components for any sediment or mineral buildup. Remove as needed.
• Replace filter per manufacturer instructions.
• Check for leaks, odd noises, or other signs of malfunction.

Regular cleaning and maintenance prevents major scale buildup when using softened water in a humidifier. Be diligent and don’t let water sit stagnant for over 24 hours at a time.

FAQs About Using Softened Water in Humidifiers

Is softened water safe for my humidifier?

Yes, softened water is generally safe for humidifiers and preferred over hard water since it won’t leave damaging limescale deposits. But take precautions for mineral deposits and bacteria growth in the softened water.

How often should I change the water?

Change the water daily to limit mineral deposits. Never leave water sitting for more than 24 hours.

What’s the white dust on my humidifier?

White dust or salt deposits on a humidifier using softened water is caused by sodium and other minerals. Clean frequently to remove them.

Can I use softened water in medical or commercial humidifiers?

Most medical facilities prefer distilled water in humidifiers to limit bacterial growth. Check manufacturer guidelines for water recommendations in medical or commercial environments.

The Bottom Line

While softened water comes with some potential downsides if maintenance is ignored, the benefits of using it in household humidifiers far outweigh any risks when proper care is taken. Limiting mineral deposits and disinfecting regularly allows you to capitalize on the benefits of scale-free softened water. Changing water daily and following manufacturer cleaning guidelines is key to success.

In summary:

• Softened water prevents limescale buildup that damages humidifiers over time.
• Take precautions to limit sodium deposits and bacteria growth in the softened water.
• Change water daily, disinfect and rinse tanks weekly, and replace filters monthly.
• With proper maintenance, softened water is safe and ideal for use in humidifiers.

So in answer to the question “Can I use tap water in a humidifier if I have a water softener?” – yes, with the proper care, softened tap water is recommended in humidifiers over hard water to prevent damaging limescale buildup and extend the appliance’s lifespan. Maintain cleaning routines to limit any downsides.

Can a Humidifier Prevent the Spread of Viruses?

Using a humidifier may provide some protection against the spread of viruses by maintaining optimal indoor humidity levels between 40-60%, according to research. However, good hygiene, masking, distancing and vaccination remain the best ways to avoid illness.

How Does Humidity Affect Viruses?

Indoor humidity levels have an impact on how viruses are transmitted from person to person. Here’s an overview of the evidence:

• Low humidity below 40% allows viral droplets to remain airborne for longer periods. This increases the chances of inhaling infectious particles.
• Conversely, higher humidity causes water droplets to accumulate and fall out of the air faster. This reduces airborne transmission of viruses.
• Maintaining indoor humidity between 40-60% is optimal for minimizing the survival and spread of many viruses, including coronaviruses, influenza, rhinoviruses and more.^[1]

By increasing moisture levels, humidifiers may be able to create indoor conditions that are less favorable for airborne viruses to transmit infections.

Are Humidifiers Effective at Raising Humidity to Prevent Viruses?

Humidifiers can increase humidity levels, but there are some caveats on their effectiveness against viruses:

• Portable humidifiers typically only raise humidity in a single room, not an entire home.
• Larger console or whole-home humidifiers controlled by a central humidistat are better able to regulate humidity in all living spaces.
• Frequent cleaning and maintenance is required to prevent mold and bacteria buildup in humidifiers.
• Monitoring indoor humidity with a hygrometer is important to maintain 40-60% target levels.

Type of Humidifier	Room Coverage	Humidity Control
Portable humidifier	Single room	Manual
Console humidifier	Large rooms or whole home	Humidistat
Built-in central humidifier	Whole home	Automatic humidistat

Used properly in smaller spaces, portable humidifiers may offer some virus protection. But whole-home systems provide the most effective humidity regulation throughout a living area.

What Factors Impact a Humidifier’s Ability to Slow Viruses?

Here are some key considerations when using a humidifier to potentially reduce virus transmission:

• The humidifier must raise humidity high enough to reach the optimal 40-60% range in order to impact virus spread.^[2]
• Models that only raise humidity slightly above baseline levels may not provide enough moisture to inhibit viruses.
• Cleaning humidifiers regularly prevents microbial growth and spread of molds that trigger allergies.
• Humidifiers are likely most effective during colder winter months when indoor air is extremely dry.
• Monitoring humidity with a hygrometer allows maintaining ideal 40-60% levels.

By using the proper humidifier for your environment, cleaning it regularly, and monitoring humidity, you can create conditions that may hinder viruses.

Reviews of Top-Rated Humidifiers

Here are some top humidifiers to potentially help reduce virus transmission by optimizing indoor humidity:

1. Levoit LV600S
Ultrasonic Humidifier

• Type: Ultrasonic cool mist humidifier
• Features: Automatic shut off, LED display, remote control, humidistat, aromatherapy
• Ultrasonic technology provides whisper quiet humidification ideal for bedrooms

With a 6 liter tank, the Levoit LV600S can raise humidity levels for 20-36 hours continuously to help achieve the 40-60% sweet spot.

2. Dreo Smart Humidifier

• Type: Cool and Warm mist humidifier
• Features: WiFi connectivity, app control, humidistat, aroma box, auto mode
• Smart connectivity allows remote humidity monitoring and control

This high-tech humidifier automatically regulates moisture levels and can be adjusted via smartphone app for whole room coverage.

3. PureGuardianH5450BCA
Ultrasonic Warm & Cool Mist Humidifier

• Type: Ultrasonic warm/cool mist humidifier
• Features: Variable mist settings, optional aromatherapy, UV-C sanitization light
• Dual heating options allow customizing moisture output

This humidifier provides warm or cool mist to maximize comfort and moisture. The UV-C light kills bacteria in the water to allow safe use in bedrooms.

The Bottom Line: Do Humidifiers Prevent Viruses?

Maintaining indoor air at 40-60% relative humidity can help reduce the infection rate of viruses and prevent seasonal illnesses. However, humidifiers should not replace other protective measures like:

• Washing hands frequently
• Avoiding touching the face
• Disinfecting high-touch surfaces
• Physical distancing
• Correctly wearing face masks
• Getting vaccinated and boosted against diseases like flu and COVID-19

Humidifiers are most effective when used alongside good hygiene habits, masks, distancing and vaccines for layered protection. Think of proper humidity control as one additional strategy for potentially decreasing viruses this cold and flu season.

Summary of Key Points

• Low humidity allows viruses to survive longer in the air, increasing transmission.
• Ideal indoor humidity between 40-60% makes conditions less favorable for viruses.
• Humidifiers raise room humidity levels, but may only cover single rooms.
• Whole-home humidification controlled by a humidistat provides the best protection.
• Frequent cleaning of humidifiers is required to prevent mold growth.
• Monitoring humidity with a hygrometer allows maintaining 40-60% levels.
• Humidifiers should be used along with hygiene, distancing and vaccinations.

Optimizing indoor humidity can reduce airborne viruses. But it’s not a replacement for handwashing, masks, distancing and getting vaccinated. Humidifiers are simply an extra precaution to use alongside other best practices for staying healthy during cold and flu season.

Frequently Asked Questions

1. How does increased humidity stop viruses from spreading?

Higher humidity causes virus particles to decay faster by disrupting their protective outer layer. It also reduces the ability of particles to remain airborne and infectious.

2. What humidity level is best to prevent viral spread?

Studies show that 40-60% relative humidity is optimal for reducing transmission of respiratory viruses like flu, cold, and COVID-19.

3. Do humidifiers completely eliminate viral spread?

No. Humidifiers reduce risks but should be combined with other precautions like masks, distancing, and ventilation.

4. How often should I clean and disinfect my humidifier?

Clean and disinfect humidifiers every 3-4 days to remove minerals and prevent microbial growth. Follow manufacturer instructions.

5. Can humidifiers encourage mold growth?

Yes, which is why cleaning, disinfecting, and monitoring humidity levels are important. Ideal humidity for preventing viruses (40-60%) also prevents excessive mold growth.

6. Should I use warm or cool mist humidifiers against viruses?

Warm mist humidifiers may humidify a bit better. But cool mist humidifiers also raise humidity effectively and are safer around kids.

7. Are humidifiers suitable to use around sensitive groups like babies?

Yes, as long as basic safety practices are followed. Clean and disinfect the unit regularly and keep out of reach of children. Monitor humidity levels.

Can I Use Distilled Water Instead of Tap Water in My Humidifier?

Using distilled water in your humidifier instead of tap water can help prevent mineral deposits that can clog the humidifier. The purification process of distillation removes minerals like calcium and magnesium from the water, which are the main components of mineral deposits.

However, the decision depends on several factors. This comprehensive guide covers everything you need to know about using distilled water in humidifiers.

What is a Humidifier?

A humidifier is a device that increases humidity levels in a single room or an entire home. It works by dispersing a fine mist of water vapor into the air. Humidifiers are commonly used during dry, cold weather to prevent problems like static electricity, dry skin, sore throats and scratchy sinuses.

There are four main types of humidifiers:

• Warm mist humidifiers boil water to produce steam
• Cool mist humidifiers use a wick filter, impeller, or ultrasonic technology to produce mist
• Evaporative humidifiers use a fan to blow air through a wet wick filter
• Steam vaporizers use electricity to boil water and release steam

What is Distilled Water?

Distilled water is water that has been boiled and condensed to remove impurities, minerals, and contaminants. The distillation process works by:

1. Heating water to the boiling point which produces steam
2. Collecting and cooling the steam which condenses it back into liquid water
3. Collecting the distilled water which now contains 99.9% pure H20

This heating and condensing process removes all minerals, salts, metals, and other dissolved substances, leaving behind pure water. According to the CDC, distilled water contains simply hydrogen and oxygen molecules (H20).

Characteristics of Distilled Water

• Neutral pH around 7
• No minerals or contaminants
• Low total dissolved solids (TDS)
• No fluorine, chlorine, or other additives
• May have trace levels of sodium from storage containers

Pros of Using Distilled Water in Humidifiers

There are several potential benefits to using distilled water in humidifiers instead of tap water:

Prevents Mineral Buildup

The main advantage of distilled water is that it prevents mineral deposits and scale from accumulating inside the humidifier. Tap water contains mineral ions like calcium, magnesium, silica and bicarbonate. As the tap water evaporates, these minerals are left behind, forming scale and deposits on the surface of the humidifier.

Distilled water prevents this buildup because the minerals have been removed. With no minerals to deposit, the humidifier remains clean and free of sediment.

Extends Lifespan of Humidifier

By preventing mineral scale, distilled water can extend the lifespan of your humidifier. Scale buildup can clog the humidifier’s internal components and reduce performance. Over time, substantial deposits can lead to overheating and cause early failure.

Using pure distilled water minimizes deposits, keeping the humidifier working efficiently for longer.

Produces Clean, Pure Mist

Since distilled water has no dissolved impurities, the mist it produces is clean. Tap water can contain traces of minerals, chlorine, fluoride and other substances that get dispersed into the air when the water evaporates. This leaves behind white dust on surfaces.

The pure mist from distilled water humidifies the air without adding contaminants. It won’t leave any mineral residue or white dust behind.

Prevents Bacteria Growth

The low mineral content of distilled water inhibits the growth of microorganisms like bacteria, algae and fungi. Tap water can promote more microbial growth. Using distilled water keeps the tank cleaner and reduces the risk of mold, mildew or bacterial growth which could get dispersed into the air.

Recommended by Manufacturers

Most humidifier manufacturers recommend using distilled water to prevent mineral scale. The manuals for brands like Honeywell, Vicks, PureGuardian, Levoit and more all suggest distilled water.

For example, the Levoit blog says: “We recommend using filtered or distilled water in your Levoit humidifiers. The pure water prevents mineral buildup from tap water that could affect your humidifier’s performance over time.”

Cons of Using Distilled Water in Humidifiers

There are also some downsides to keep in mind when using distilled water:

More Expensive than Tap Water

Distilled water is more expensive than tap water. You’ll need to continually buy distilled water from stores to fill up your humidifier. The cost can add up over time compared to just using water from your sink.

Inconvenient to Purchase

Distilled water may not always be easy to find. While it’s available at most grocery stores and pharmacies, you’ll need to make frequent trips to buy new jugs when you run out at home. This can be inconvenient compared to just using tap water.

Lacks Minerals Found in Tap Water

While pure, distilled water lacks many of the natural minerals found in tap water like calcium, magnesium and zinc. Some people believe the minerals in tap water have health benefits when dispersed into the air.

However, the tiny amount of minerals emitted by humidifiers is unlikely to make a significant health difference.

Overkill for Some Humidifiers

For evaporative humidifiers, distilled water provides no real benefit. Evaporative models don’t produce fine mists, so mineral dust is not an issue. The wick filters are inexpensive and designed to be replaced frequently.

Using distilled water may be overkill unless you have an ultrasonic or impeller humidifier that produces fine mists.

When Should You Use Distilled Water?

Here are some guidelines for when to use distilled water in your humidifier:

Humidifier Type

Use distilled water in:

• Ultrasonic humidifiers
• Impeller or cool mist humidifiers
• Warm mist humidifiers

It’s not necessary in:

• Evaporative humidifiers
• Steam vaporizers

Water Quality

Use distilled water if your tap water has:

• High mineral content
• Visible sediment or cloudiness
• Bad taste or odor
• High chlorine levels

Tap water with less than 200 ppm total dissolved solids is likely fine to use.

Mineral Deposits

Switch to distilled water if you notice:

• Scale buildup inside the tank
• White dust around the humidifier
• Minerals in the mist coming out

These are signs you need to remove minerals from the water.

Manufacturer Recommendations

Look at the user manual and see what type of water is recommended. Most brands suggest using distilled water.

Other Tips for Humidifier Care

To get the most out of your humidifier, follow these maintenance tips:

Clean Regularly

Clean and disinfect your humidifier every 1-2 weeks following the manufacturer’s instructions. This prevents mold and bacteria growth.

Change Filters

Replace any filters at the recommended interval to remove sediment and minerals.

Use Water Treatment

Try demineralization cartridges or water softeners to remove minerals from tap water instead of distilled water.

Dry Out Between Uses

Allow the tank to dry out completely between uses to prevent microbial growth.

Monitor Humidity Levels

Use a hygrometer to maintain the optimal 40-50% humidity range.

Descale Buildup

Use white vinegar to dissolve any mineral scale that accumulates inside the humidifier.

Frequently Asked Questions

Can you mix distilled and tap water?

Yes, you can mix distilled and tap water in any ratio you like. Many people mix a 50/50 blend to reduce costs while still minimizing mineral deposits.

Does distilled water remove minerals from the air?

No, distilled water does not remove beneficial minerals from the air. It simply doesn’t add any excess minerals to the air that a humidifier produces.

Is distilled water safe for humidifiers?

Yes, distilled water is perfectly safe to use in humidifiers and is actually recommended by most manufacturers.

Can you use purified or filtered water?

Purified water works similarly to distilled water, but check that it has a low TDS. Not all filtered water removes minerals, so check the specifics.

Is demineralized water the same as distilled?

Demineralized water has had minerals removed, but not always by distillation. Distilled water is a type of demineralized water.

The Bottom Line

In most cases, using distilled water in ultrasonic and cool mist humidifiers is recommended to prevent mineral buildup. It produces clean, mineral-free mist and extends the lifespan of the humidifier.

However, distilled water is more expensive, inconvenient, and lacks healthy minerals. For evaporative models, it’s often not necessary. Consider your water quality, humidifier type, and manufacturer guidelines when deciding.

And remember to clean your humidifier regularly for the best performance! By following these tips, you can determine if distilled water is the right choice for your situation.

Can a Humidifier Help With Asthma in Children?

Yes, using a humidifier can help improve asthma symptoms in children by adding moisture to dry air and keeping optimal humidity levels between 30-50%. This helps hydrate and soothe irritated airways, loosen mucus, and prevent airway restriction.

Asthma is a chronic lung disease characterized by inflammation and narrowing of the bronchial tubes. This makes breathing difficult and can trigger coughing, wheezing, shortness of breath, and other symptoms. Dry air is a common trigger that can irritate inflamed airways and worsen asthma in children. By adding moisture back into the air, humidifiers may help reduce these asthma symptoms.1.

Understanding Childhood Asthma

Asthma is the most common chronic disease in children, affecting over 6 million kids under 18 in the United States. It causes swelling in the airways which narrows the breathing tubes and produces extra mucus. This combination makes it hard to breathe and can bring on asthma attacks.

Some common triggers for childhood asthma include:

• Colds and respiratory infections
• Exercise
• Outdoor allergens – pollen, dust mites, mold, pet dander
• Indoor irritants – smoke, strong odors
• Changes in weather and temperature
• Air pollution
• Stress or strong emotions

When exposed to these triggers, the airways become inflamed, swollen, and filled with mucus. Smooth muscle surrounding the airways also tightens up, causing bronchoconstriction. This narrows the air passages and makes it hard for air to flow properly in and out of the lungs.

Common symptoms of childhood asthma include:

• Coughing, especially at night
• Wheezing
• Shortness of breath
• Chest tightness or pain
• Trouble exercising or playing

Symptoms can range from mild and intermittent to severe. Asthma attacks involve severe symptoms that do not improve with quick-relief inhalers. Medical treatment is needed right away for attacks.

How Do Humidifiers Help with Asthma?

Dry air is a common trigger for asthma symptoms. Cold, dry air can irritate the airways and cause inflammation and bronchoconstriction. This narrows the breathing tubes and makes symptoms worse.

By adding moisture back into dry air, humidifiers may provide relief for kids with asthma in several ways:

• Hydrate the airways – Dry airways are more easily irritated. Keeping optimal moisture prevents irritation and swelling.
• Loosen mucus – Humidity helps thin out mucus secretions so they can be cleared from the lungs.
• Prevent airway restriction – Added moisture prevents airways from swelling and tightening up.

This can help reduce coughing, wheezing, shortness of breath, and other asthma symptoms. Humidifiers may be particularly helpful at night when asthma symptoms tend to worsen.

Ideal Indoor Humidity for Asthma

The ideal indoor humidity level for asthma patients is between 30-50%. Below 30% humidity allows too much dryness, while over 50% increases mold and dust mite growth which are asthma triggers. A humidity range of 40-45% is optimal.

Using a hygrometer to monitor humidity is recommended when using a humidifier for asthma. This allows you to maintain the 30-50% sweet spot.

Tips for Using a Humidifier for Child Asthma

If you choose to use a humidifier to help with your child’s asthma, here are some tips:

• Pick a cool mist or warm mist humidifier – Both types can effectively hydrate dry air. Cool mist may be safer around kids.
• Use distilled or filtered water – This prevents mineral and bacteria buildup in the humidifier.
• Change water daily – Stagnant water breeds mold and bacteria otherwise.
• Clean regularly – Follow manufacturer instructions for cleaning and disinfecting.
• Monitor humidity level – Use a hygrometer and aim for 30-50% humidity.
• Use at night – Place in your child’s room for maximum effect on nighttime symptoms.
• Keep out of reach – Don’t place right next to crib or bed for safety.

Proper maintenance is key to getting the benefits from your humidifier and avoiding potential mold and bacterial hazards.

Other Asthma Management Tips for Kids

While a humidifier may help, it should not be used in place of standard asthma treatments. Other ways to manage your child’s asthma include:

• Having your child take prescribed daily controller medications to reduce inflammation.
• Avoiding triggers like tobacco smoke, dust mites, mold, pet dander, and other allergens.
• Creating an asthma action plan with your doctor to treat attacks.
• Learning proper inhaler and spacer techniques if using inhaled meds.
• Getting an annual flu shot and practicing good hand hygiene.
• Monitoring breathing with a peak flow meter at home.

Work closely with your child’s doctor to find the right combination of medications, trigger avoidance, and asthma management strategies. A humidifier can be a helpful add-on treatment when used properly.

The Bottom Line

Research shows using a cool mist or warm mist humidifier may help improve asthma symptoms in children by adding moisture back into dry air. The optimal humidity level for asthma patients is 30-50%. Humidifiers can help hydrate irritated airways, loosen mucus, and prevent airway restriction and swelling.

While studies show benefits, more research is still needed. Humidifiers should be used as an adjunct treatment, not a replacement for doctor-prescribed asthma medications and management plans. When used alongside medical treatment and trigger avoidance, humidifiers can be a useful part of controlling asthma in kids.