Best Air Purifier 2018

best air purifier for bedroom

What's better than waking up to a breath of fresh air?

After more than 120 hours of testing we are pleased to introduce our top pick for the best air purifier 2018, the Alen Breathesmart. This powerful machine covers rooms up to 1,100 square feet, comes in 14 panel colors to suit your home's design theme, is surprisingly quiet and comes with a lifetime warranty.

Our mid-end budget pick, the Coway AP-1512HH is another award-winning top air purifier. It has CADR ratings of 210 for dust, smoke and pollen and has a 4-stage filtration process.

Our bargain budget pick, the GermGuardian AC5000E 3-in-1 True HEPA may be less powerful than our other top picks, but still packs a punch. Its CADR ratings for dust, smoke and pollen is 125, sufficient for basic protection. Models like this are relatively inexpensive but still able to clean the air from harmful pollutants, toxins, and even allergens that could upset your health. 

Sizing Guide

One of the most common questions is how much coverage capacity you need. First, read the product description for an indication of the recommended maximum coverage area.

The coverage area you see in the product descriptions typically refer to the space within which the unit can filter the air 5 times an hour. This is also known as air changes per hour or ACH. This metric is always tied to the volume of the space within which an air cleaner operates in. For example, the Alen Breathesmart, our top pick, is suitable for use in rooms up to 1,200 square feet. This means that it is capable of cleaning the air in a 1,200 square feet room 5 times an hour.

The more contaminated or polluted the air, the higher you need the ACH rating to be. To give you a range, a 5x ACH rating will be sufficient for most residential environments. An 8x ACH rating may be needed for commercial environments, while a 10x ACH rating will be needed for industrial environments. At the most extreme end of the spectrum, hospitals and other critical environments will need a 12x ACH rating.

To figure out how large a machine you need, identify where you would need the air to be purified. For most people, spaces include each bedroom and the living room.

Next, figure out the size of each of these rooms to determine the size you need. If you get one with a large coverage area, depending on the layout of your house, you may just need one placed in the living room to purify your entire house.

Buying Guide

Once you have figured out how to size the air purifier, there are many other factors you should also consider:

Coverage Area: This is the area over which your machine will be able to clean the air at least 5 times an hour. When considering how powerful a machine you need, this is a key criterion. No point getting a purifier for a small room if you are really trying to purify your entire living room.

CADR Rating: Also known as the Clean Air Delivery Rate rating, this is a standard industry metric that allows you to benchmark different air purifiers on their ability to remove dust, smoke and pollen. Look for CADR ratings of at least 100 when picking one.

ACH Rating: As explained above, the Air Changes Per Hour rating is closely tied to the size of the space the air purifier operates in. Most manufacturers default this to 5x for the coverage area advertised, but check the fineprint just to be sure.

Ozone Emission: Ozone emissions can be harmful to the lungs overtime. Unfortunately, most machines on the market claim to emit minimal ozone but not all emit absolutely no ozone. Always check just to be sure.

Pre-Filter: Look at whether your machine comes with a pre-filter, and if it does, whether it can be vacuumed. Pre-filters help block larger particles and protect the core HEPA filter, which can be more delicate and used to filter out finer particles. Often, pre-filters may be coated with activated carbon or other materials to help absorb smoke smells and other odors.

Noise: Some machines might work like a charm but can be very distracting if they generate very loud white noise. Check for their noise levels and whether other customers have been able to sleep well.

Warranty: Most will come with at least a 3-year warranty. Look for this as a bare minimum you should accept. Any lower than this and the quality of the product might be suspect. Some manufacturers even offer lifetime warranties.

Top Pick

Of all the models we reviewed, only the Alen Breathesmart comes with unlimited lifetime warranty. This purifier covers rooms or houses up to 1,100 square feet, more than enough for most living rooms. It comes with 4 speed settings, does not emit ozone and under normal operation is extremely quiet, generally barely audible.

The standard filter the Alen comes with is a HEPA-Pure filter, which is the standard HEPA air filter capable of removing 99.97% of particles as small as 0.3 microns. If you need additional filtration power, this best Alen air purifier also has the following more advanced filters you can choose from:

Activated Carbon filter: This filter is good for light odors such as cooking smells and smells from common household chemicals.

HEPA-Silver Filter: This filter is more advanced than the basic filter, and is capable of removing volatile organic compounds (VOCs) from cleaning products.

HEPA-FreshPlus Filter: This is an advanced filter option that is suitable for removing strong odors such as those from heavily polluted air, chemicals and paint.

Step-up Pick 

For those of you who simply want the most powerful model the IQAir HealthPro Plus would be a good choice. Manufactured in Switzerland, the IQAir is designed for perfection and of top engineering quality. Trusted by hospitals and winner of multiple awards internationally, the IQAir is extremely energy efficient and is our top choice for the best whole house air purifier and a step-up pick. It uses a HyperHEPA filtration system, which allows it to filter out particles as small as 0.003 microns. This means it is 100x more effective than ordinary HEPA purifiers.

IQAir uses a 4-stage filtration process:

1. Pre-Filter: the pre-filter protects the core filters by first removing larger particles such as pet dander, pollen and dust.

2. Activated Carbon Filter: the carbon filter is the best defense against pesky odors. Activated carbon absorbs odors easily and also traps any volatile organic compounds. V5 filter, a specialized gas and odor filter that can remove a large variety of chemicals and odors.

3. Pelletized Chemisorption: the pelletized chemisorption filter is extremely powerful and takes care of chemicals that most other air purifiers will not be able to capture. This filter makes the IQAir the best air purifier for formaldehyde.

4. HyperHEPA Filter: this final filter captures ultrafine particles including viruses and bacteria

Mid-End Budget Pick

The sleek-designed Coway AP-1512HH has won numerous awards and is relatively inexpensive. It covers rooms up to 326 square feet and has a CADR rating of 210. It is extremely quiet and comes with five settings (low / medium / high / eco / auto). On Eco mode, the air purifier will turn itself off until it detects a change in air quality, helping you save energy. On low mode, the unit is barely audible and is perfect for sleeping. It also comes with an ionizer mode that allows you to generate negatively charged air.

We love the Coway because it simply works – no weird smells, no nonsense, just clean air that smells fresh.

Bargain Budget Pick

For those who suffer from allergies or are worried about how clean their air at home is, the Germ Guardian AC5000E offers everything that they are looking for. This model did a great job in our tests of removing impurities from the air. It also worked great at making the air smell fresh and clean which is always a nice added feature. It runs quietly and does not cost much to run.

The True HEPA filter that is featured on this model is great and is successful in removing nearly all impurities from the air. In fact, only about 0.03% of impurities are found in the air after it has passed through this filter. Additionally, the added charcoal filter is great if you have pets because it can quickly and effectively remove unpleasant odors from the air.

Another feature about this model is that the actual filter only needs to be replaced every six to eight months which means that there is little maintenance with its use.

For Pets

The Winix WAC9500 is able to wipe out 99.99% of all pollutants from the air and is specially designed for those who live with pets and those who may have pet allergies. This air purifier for pets actually can remove particles as small as 0.3 microns. Plus, this unit features the special PlasmaWave Technology which helps to neutralize viruses, gases, and other pollutants in the air. The pre-filter captures pet hair and other large particles easily. It is washable so you can just clean and re-use it too which makes it easier to maintain and less expensive.

For Smoke

Even if you are a non-smoker but you have a neighbor or roommate who smokes, chances are your room or apartment will still smell of smoke. The best way to deal with the situation is to remove the source, but should that not be possible, getting a good air purifier for smoke is your best bet. The Blueair 503 is a powerhouse with clean air delivery rates of 375 for dust, smoke and pollen. It is designed for rooms up to 580 square feet. If volatile organic compounds (VOCs) and formaldehyde removal are also important, this model also shines in these aspects.

To make the Blueair 503 even more powerful, Blueair has a separate specialized Smokestop filter you can order that works wonders against VOCs, heavy gases and smoke. The filter contains activated carbon, magnesium dioxide and copper oxide, a potent mix that traps smoke particles and tobacco extremely well.

For Allergies

If you are dealing with various kinds of allergies, the RabbitAir is the best for allergies. It is very well-built, durable, and features a six-stage air purification process (pre-filter, medium filter, HEPA filter, customized filter, charcoal filter, negative ions). It comes with four advanced filter options (odor remover, pet allergy, germ defense, toxin absorber) and covers rooms up to 700 square feet. The unit is certified to emit zero ozone, and has CADR ratings of 208 for pollen, 200 for dust, 193 for smoke.

The filter is long-lasting and only needs to be changed once every one to two years. In the interim, all you need to do is to vacuum the pre-filter occasionally.

For Dust

If dust is the issue, consider getting the Oransi Max, the best air purifier for dust we have reviewed. One of our reviewers unfortunately lived near a construction site and the Oransi Max was what she used to protect her family from the dust that would accumulate in the house everyday even with most windows closed.

This model was rated #1 in testing conducted by an independent Clemson University study, and comes with a sturdy 10-year warranty. The Oransi Max works well in rooms up to 600 square feet, has a CADR rating for dust, smoke and pollen of 230, and produces white noise that is barely audible. This unit is very stylish and fits well in any contemporary living room or bedroom.

For Mold

If you have a mold or mildew problem, you need the Airfree Onix 3000. When dealing with mold, take note that most purifiers with filters would not be effective over the long term. Instead, you need a filterless air purifier like the Airfree Onix 3000. This air purifier for mold contains a heated core and uses heat to destroy microscopic spores, mold, dust mites, bacteria, viruses and any other microorganisms you may want to get rid of. An added advantage of using a filterless model is that there are no filters to replace – which could represent significant savings over time. The Airfree Onix is also completely silent.

Best HEPA Air Purifier

If you are on a shoestring budget and need something that you can afford then check out this pick. The Holmes HEPA Type Desktop Purifier can safely and easily remove 2 microns and 99% of the particles that are in the air. This is a great choice because of its low cost for those living on a budget or for those who do not think that they need one. In fact, this is probably one of the best starter models that you can buy to see how it can change your life and the lives of those who are living in your home.

For those who are living on a budget, the idea of an air filter might only seem like a dream. Not anymore, it offers you everything that you are looking for in a purifier without breaking the bank. This model will remove 99% of the airborne particles. However, you are not going to get the benefit of better smelling air as this one does not have an odor eliminator. You can also use a number of different sized filters with this one which is nice because when you are on a budget, you will have choices to try and find the best deals.

Best Ionizer

The O-Ion B-1000 Permanent Filter Ionizer has everything you need to breathe clean fresh air at home. It can remove up to 99% of the toxins in the air. It has a number of different types of filtration that your air goes through before you are breathing it, which means that you have cleaner air to breathe. It also helps you to have air that smells better since it has a carbon filtration system. Its UVGI technology kills germs, bacteria and other allergens effectively.

This model removes a little less impurities from the air but it is offered at a better price. It still helps to make homes smell great, even if they have pets, and ionizes the air which can help make it easier to breathe.

For Allergens

If you’d like a step-up from the regular and need something that gets rid of allergens effectively, then you have to check this out. It comes with a UV sterilizing function that destroys the molecular structure of bacteria, and is ideal for those suffering from allergies. The Biota Bot uses 7 stages of purification and with its charcoal filter removes formaldehyde, smoke and pet odors from your living surroundings. We also liked the sleek design - nice addition to any living room.

Best Room Air Purifier

The Honeywell True HEPA 50250-S contains a glass fiber HEPA filter and a carbon activated pre-filter, and has CADR ratings of 250 for dust, smoke and pollen. Unlike many other models, the unit is able to take in and discharge air from any angle. The 360-degree protection makes placement easy for this machine, the top for rooms we have come across. It is one of the most value-for-money we have come across.

Best Air Purifier and Humidifier

The Venta Airwasher 2-in-1 humidifier and air purifier is an outstanding 2-in-1 unit. It is compact and efficient, suitable for spaces up to 200 square feet. This unit is also filterless, instead using water to purify and humidify the air. This means you will save significantly on filter replacement costs over time. German engineered, this air purifier humidifier combo is hygienic, clean and low maintenance and a steal.

Maintenance Tips

Learning how to maintain an air cleaner will save you both time and money in the long run. Taking care of little things like keeping windows and doors shut when the unit is on and directing the unit close to pollutants is important.

Air purifiers are more straightforward and energy-efficient to work with when placed in an open space. They need plenty of breathing space to promote air circulation and air filtration. That said, making sure you keep your purifier in a large space is important. It is especially important when you have any allergies or asthma-related medical conditions.

This, not to mention, prolongs the shelf life of any model. Cleaning filters or replacing them with brand-new ones regularly help immensely.

Most of the times, you will find a precise manufacturer’ time interval on the specifications that tell you how often you have to either clean or replace the filters. To maintain your unit better, here’s what you need to know. 

  1. Before cleaning, make sure you unplug the unit from the socket. Get ready to take apart each component of the purifier in such a way that it can be put back together easily. This includes unfastening the grill and removing the filters for a clean or for replacing.

  2. If you’re using a model with permanent filters, you can vacuum the filters once every 3 months for them to filter indoor air pollutants more effectively.

  3. Using pre-filters that are hand-washable are perfect when removing large particles that block the filtration process.

  4. It’s always safe to use transparent water for cleaning the filters and the whole purifier unit. Avoid using any detergent, glass cleaner, paint thinner, gasoline and other chemicals. Also, using a damp cloth for cleaning the surface of the purifier is good enough.

  5. If you want to remove any dust or pet hair from the filter, using a brush with soft bristles is a good option. This step prolongs the shelf life of any filter for as long as you gently scrub.
  6. HEPA air purifiers should be cleaned with a dry cloth.

Nice to Have Features

Here is a laundry list of features that are nice to have in the best air purifier but not essential. Since you spend most of your time indoors, taking care of your health is not something to take lightly. The following features will help you deal with the level of irritants, microbes, bacteria, and dust particles that can enter through doors and windows. 

Speed Controls: Most models come with versatile speed functions. You can control the intensity level of the unit easily depending on your preferences.

So when you’re spending time in your room during the day with the windows open, keeping your air purifying speed to a higher speed is essential. You can reduce it to lower speeds when you need a quieter working or sleeping environment.

Remote control: With a remote control, you can simply control all the settings without physically walking up to the machine. This saves time and makes the unit more accessible and efficient.

Indicators: This includes a filter change indicator and maintenance indicator. You won’t always know when the air purifier’s filter is clogged. And neither will you know the right time to replace your worn out filters. Having such expert guidance can increase shelf life and help you make the right decisions for better care and maintenance.

Dirt sensor: This feature is typically found in higher spec models. Based on the number of dust particles and other microbes in your room, the unit will be able to adjust its fan speed settings for better air filtration.

Pre-filter: A pre-filter comes before the main filtration system to get rid of bigger dust particles that may block the natural flow of the air purifying process. This works to increase the shelf life of the main filters.

Frequently Asked Questions

Q: Why do you need an air purifier?

A: There are many reasons that you can get a purifying machine, such as the following:

1. It keeps you healthy all year round.

2. It’s helpful for pregnant women.

3. It can help protect babies.

4. It’s beneficial for those in apartments or enclosed homes.

5. People in their senior years can benefit from it.

6. Children will be protected from sickness causing viruses.

7. You don’t constantly have to dust and clean.

8. People with allergic rhinitis can benefit from it.

9. You may have other respiratory problems and need clean air.

10. Your next door neighbor is a factory or a major highway.

11. …or you live next to a volcano or forest fire zone.

12. You can keep mold spores off the house if you have a garden.

13. It helps reduce chemical smells.

14. There’s always a lot of dust in your home for some reason.

15. It’s great for those with weakened immune systems.

16. It’s beneficial for people with MCS or Multiple Chemical Sensitivity.

17. Secondhand smoke is present at home and is a problem.

18. People who keep pets around will benefit from it.

19. Molding in water stains happens at home.

20. Frequent movers will find off-putting gas smells.

21. Home renovations can also make the air polluted.

22. Art supplies can harbor carcinogens and toxic smells.

23. Home offices with electronics also need to be purified of air.

24. If you live in a building or complex, things can get smelly due to neighbors.

25. You’re in a farm – pesticides can harbor bad effects to your health.

26. You’re in a building and downstairs is a business firm.

27. The garage can also harbor dust.

28. You get eye irritations often due to dust.

29. It’s great for keeping the fireplace dust away from your furniture.

30. Your home-based job involves the use of tools that can smell bad.

Q: What are the types of purifying machines?

A: The different types of purifying machines according to their filter technology are the following:

1. Activated Carbon – this is the most common type and the oldest of all the types of purifying machines. It has been used since the WWI and are made with activated carbon filters that are great for odor reducing, such as for smoke, gas and the like. They are great for such bas pollutants in the air and can help purify the indoor air quality at home. They can also be great for removing pet odors.

This purifying machine can remove various pollutants as well as VOCs that are found in cooking and smog. They are also great for those with MCS or multiple chemical sensitivity. The only downside to these purifying machines is that they may not be as good as other filters in terms of efficiency, but otherwise, they work well for a simple purifying machine. If you get a higher quality model then you’re sure to have a better time with it.

2. HEPA Filter – this is a newer and much more expensive type, but is today’s most bought type. They can trap particles that are much larger than 0.3 microns, which is to say that they can trap most dust and other airborne pollutants up to 99.97 percent, which is a big deal. The purifying machine can get rid of bad bacteria, airborne viruses and other harsh chemicals that can’t be seen by the naked eye.

If you want pure sanitary cleaning for your home without much effort then the purifying machine is a safe choice. The only problem with the purifying machine is that the HEPA filter is costly to replace, however, they can last from 2 to 4 years so they don’t really require a lot of replacement – just frequent cleaning to make it work properly. Compared to the carbon filter, the purifying machine doesn’t do a good job with odors, however.

3. UV – this method is much newer and it uses UV rays to kill the bacteria. In most purifying machines, they can also be a supplementary type of purifying method that can go along with your HEPA filter machine or with your activated carbon machine. Also, in most cases, the UV method is the last method in the filtering stages of a regular purifying machine because of its concentrated finishing touches.

The purifying machine can also clean up ozone and can be great for keeping the bad bacteria and viruses away from your home and family, but you should use it alongside another filtering system because it may not get into the UV lamp, which is important in preserving the technology and the lifespan of your purifying machine. It should be used alongside other technologies to get the best effects out if it.

4. Ozone – this type of purifying machine uses gas ozone to clean the air. While this is not a very popular type of purifying machine, it can work at some point. Their only purpose so far is to keep mold from growing, so they are perhaps good for areas with a lot of mold problems. However, they are not very effective for indoor air quality maintenance.

If you want to use an ozone type purifying machine then you should consider where you want to use it. Also, the ozone concentration for the unit should be enough to clean the mold and other biological stuff that can harm your family. They should not be used too much because they can potentially cause asthma symptoms in people when not used properly.

5. Negative Ion – this one is also a newer technology that uses negative ions to clean the air. They are also called ionizers and can also be an added feature to an existing system of purifying air. These purifying machines tend to make ions work like magnets to keep the dust particles onto a solid surface instead of being stuck in the air, where your nose and lungs can potentially breathe them.

The purifying machine is ideal for those times when there is not too much dust in your home, and when you do have a lot of time cleaning. They only stick the pollutants to walls or windows so you can clean them later, but they don’t give you a satisfying job overall, but they are still a great way of cleaning the house from most air pollutants if you use the right method for it.

Q: How often should I clean the air filter?

A: It depends on the type of the filter that you have, so it is important that you know the type of filter that your purifying machine has:

Permanent Type Filter

Replaceable Type Filter

When it comes down to a permanent type filter, you can just clean it up every 3 months or so, but this also depends on the frequency of usage, the amount of pollution at home and the user’s manual instructions.

If you have a replaceable type of filter for your purifying machine, you should replace it somewhere between 3 to 6 months depending on the usage, the pollution at home and the instructions by the manufacturer.

Q: What is the average power consumption of this kind of purifying machine?

A: This kind of appliance consumes relatively low power and consumption so it does not impact your monthly electric bill, such as with the following:

Average Energy Consumption of Air Purifier

Low speed

Medium speed

High speed

Kilowatt hour

Annual cost

2.64 watts

3.96 watts

5.28 watts


$3.46 to $6.93

Q: What are the pros and cons of HEPA filters?

A: The HEPA filter is a relatively popular type of filter because it is very much permanent at most if you just clean it regularly. They also tend to be much more durable and thus cost more but give more efficiency when it comes down to eliminating pollutants in your indoor air. Here are their pros and cons:

Pros or Advantages:

1. Efficient cleaning – they can be easy to clean and can be washable.

2. Keeps your lungs safe – they can filter out particles in the atmosphere of your home.

3. Great for circulated air – they work efficiently unlike other purifying machines.

4. May not need replacement – they can last longer than carbon filters.

Cons or Disadvantages:

1. Not ideal for odors – unlike carbon filters, they won’t easily keep bad odors away.

2. They’re generally expensive – HEPA filters tend to be costly upfront and for filters.

3. Some are bulky and aren’t washable – this is a case to case basis as some models aren’t like that.

Q: What are the most common indoor air pollutants?

A: Indoor pollutants can decrease the quality of air at home and can potentially cause allergies and even problems such as respiratory issues, ailments and even death due to poisoning of some chemicals. Some of the most common pollutants that lurk indoors that may harm your family are the following:



What you can do

Carbon monoxide

This is a kind of poison that could potentially be lethal and kill people. In smaller concentrations, you can just get dizzy and get headaches or you may feel tired. However, it should be noted that it is dangerous for longer periods of time.

Carbon monoxide poisoning can be prevented by checking your heating system or HVAC system for leaks and the like. Make sure your appliances are properly vented if they are combustion types.


There are many risks to lead poisoning, such as brain damage and kidney damage. It can also be a threat to your nervous system, red blood cells and the developmental growth of children.

It is important that you keep your children’s rooms clean as much as possible. This can help reduce the likelihood of lead poisoning from toys and the like.

Secondhand smoke

Secondhand smoke affects anyone, whether you have a smoker in the house or not. This happens especially in a community that is highly polluted. It can cause irritation on your eyes and throat as well as asthma and other respiratory problems.

You can prevent secondhand smoke by being responsible with smokers. Don’t allow them to smoke inside the house.

Nitrogen oxide

This can be dangerous to your respiratory system, can lead to lung injury and can also potentially threaten those with asthma or other respiratory problems.

Appliances that use combustion should have a properly vented setup and should be checked at least once a year for damage. Idling your car in the garage can contribute to nitrogen oxide, so it’s best to turn the engine off when it is not in use.


Mold is an asthma trigger as well as a cause of most irritations, headaches and various allergic reactions.

Make sure your humidity levels are just fine and you should consider having a bathroom fan.

Q: What are the pros and cons of UV filtering?

A: A UV filtering system is a kind of purifying system that is common on most homes and can be a part of a much bigger system. It has the following pros and cons:



a. It removes airborne particles.

b. It has the power to remove bad bacteria from the air.

c. It can eliminate even the smallest microorganisms in your indoor setting.

d. They can be super quiet compared to other types of technologies for machines.

a. They can be much more expensive compared to others.

b. They may not be fully available to the market in some stores and countries.

c. Some models need to be replaced with their bulb yearly.

d. It doesn’t remove all of the allergens in the air.

Q: What indoor plants can help your purifying machine do its job better?

A: There are many plants that you can put in your home in order to get more benefit from a clean indoor atmosphere quality. Here are some plants that you can place indoors:

a. Peace Lily – this is also known as Spathiphyllum and can be ideal for shady areas at home. They are great for removing most VOCs and they look pretty for those with a white theme. They are fairly easy to care for and can be great for its design. You can just water it once a week and it will grow just fine. However, make sure that it is not ingested by anyone in the house due to its mild toxicity.

b. Red Edged Dracaena – this one is one of the best plants to have indoors if you want a spikier and taller indoor plant. It can help remove most VOCs like xylene and benzene. It is also mildly toxic when ingested but it is great for keeping indoor atmospheres clean from harsh chemicals. It only requires indirect sunlight and slightly shady areas.

c. Snake Plant – the snake plant is one of the most popular types of indoor plants because of being perennial or blooming all year round. It works best for most toxins in the air like xylene, nitrogen oxide, benzene and formaldehyde. It can be seen in almost all homes around the world, even in tropical countries, due to its ease of care. It is also perfect as a beginner’s plant.

d. Devil’s Ivy – this is also great at taking out pollutants such as trichloroethylene as well as xylene and can be kept in darker areas of your room. It should have a moisturized soil when you plant it indoors. It is commonly found in the Solomon Islands and is also called the golden pothos or Epipremnum aureum.

e. Florist’s Chrysanthemum – this is also called the garden mum and is known to have really cute looking flowers. It is a variation of the daisy and has a pink or carnation like color and can also help in keeping your home free from toxicity such as ammonia, toluene and formaldehyde. They are a great addition if you want to add flowers to any room and not just plainly decorate it.

Q: What are the differences between air purifiers and humidifiers?

A: There are specific differences that can be found between air purifiers and humidifiers, such as the following:


Air Purifier



They are mostly meant for keeping the indoor air clean from pollutants.

They are mostly used to add humidity to a very dry room or area.


There are various types, such as ionizers, UV filters, HEPA filters, ozone, charcoal and the like.

There are also different types, such as evaporative, steam vaporizers and ultrasonic types.

Problems encountered

They can suffer from clogging because of an unclean filter or a filter that hasn’t been changed in many years.

They can suffer from mold and mineral buildup when they are kept with stagnant water, especially for the evaporative and steam types.

Q: What defining features make a quality purifying machine?

A: If you are looking for an ideal purifying machine, you should look for these unique features that make the machine stand out from the rest of the competition:

a. The pre-filter should be made with stainless steel material.

b. The water tank can be transparent to let you know the remaining amount of water.

c. The ease of removal of the filter and other components for ease of cleaning.

d. The net outlet should be stainless steel to add more sanitizing power.

e. The flap should be made with quality stainless steel as well for added sanitization.

f. A silver ion fan can add more antibacterial properties to the system.

g. A deodorizing filter that goes along with your main filter can be made to eliminate odors.

h. An eco-mode can help adjust the level of humidity according to the situation in the house.

Q: What illnesses can I catch with air pollution indoors?

A: There are certain illnesses and diseases that can potentially harm you indoors, such as the following:

1. Respiratory diseases – these can potentially happen to those with problems with their lungs and respiratory system due to difficulty in breathing because of pollution. One of the most common ones would be the asthma attack as well as the chronic obstructive pulmonary disease. Lung cancers like mesothelioma and pulmonary cancer can also happen, as well as a reduced lung function. These respiratory and lung diseases can potentially happen to anyone. Some may also have pneumonia.

2. Heart and cardiovascular problems – these can include stroke risk, heart related diseases and cardiovascular disorders alongside the respiratory problems. Those who are above their 40s are at a greater risk for these kinds of problems so it is important to keep the atmosphere clean indoors if you have older people in the house. If you have a hereditary case of heart problems such as stroke then you should keep your indoor setting clean.

3. Leukemia – this can potentially happen because of benzene, which is a chemical that may be present indoors depending on the chemicals that you have at home. It is a deadly type of cancer that targets a person’s white blood cells.

4. Liver cancer – this and other cancer types can manifest in people potentially due to VOCs that can be carcinogenic or cancerous. They can also cause difficulty in breathing among other symptoms.

5. Brain problems – when you get exposed to volatile metals, it can potentially poison your brain and can lead to neurological and developmental problems in kids, which can be seen in certain disorders that are related to human behavior.

Q: What are the pros and cons of carbon filters?

A: A carbon filter type of purifying machine is one of the most common types of filters out there, and are the best for odor removal. Here are the pros and cons of carbon filters:



a. It is great for adding filtration at home against chemicals that are harsh for people and pets.

b. It is great for its ease of maintenance as they are easy to replace due to the cheap cost of the filter.

c. It can eliminate nearly all types of odors, which is something that the HEPA filter and other filters cannot do.

a. They tend to be less durable than other types of filtering systems out there.

b. Filtration is not as good as other type of filters out there.

Q: What are the pros and cons of ionizers?

A: The ionizer is one of the types of purifying machines and can have the following pros and cons:



a. They tend to be cheaper compared to other types of purifying machines out there.

b. There are no filters for you to clean and to replace.

c. Most of them tend to have a smaller size so they can be very easy to operate and used in small rooms. They can be portable as well.

a. They are more suited for smaller particles and not for large household dust.

b. The ionizer can potentially produce some amount of ozone, which can harm the environment and your lungs.

Q: Aside from the purifying machine, how else do I improve indoor air quality?

A: There are many ways for you to improve the atmosphere conditions in your home, such as the following tips:

1. Try mopping your floor right after vacuuming it. Mopping your floor is an important step because vacuums don’t always clean everything that much. Make sure that your home is clean enough so that allergies won’t form easily.

2. Consider adding floor mats to all door entryways. These can help guests keep away the dust in your home. If you came from the outside world, you will just keep it away from the flooring by stepping your feet onto it to remove the dust, dirt and mud.

3. Consider adding a humidifier or a dehumidifier to adjust the humidity of your home. This kind of device can help stabilize the humidity, which can improve the quality of your home conditions or indoor space when it comes down to allergy problems.

4. Keep the smokers outside of the house. Secondhand smoke is a primary form of pollutant indoors so it should be kept outside to avoid causing allergies and respiratory problems to people. This is common sense for most people, but others aren’t really doing it.

5. You can test your home for radon leakage. Radon poisoning can potentially happen and you may not know it – only experts can potentially know by testing if your home or vicinity has some form of radon leakage, which can be fatal and can cause death if it is not controlled.

Q: What commonly causes indoor air pollution?

A: Aside from specific chemicals, here are the common causes of indoor pollution:

1. Ozone – this can come from indoor ionizers as well as UV light, so you should take extra caution when you try cleaning products, terpene extracts and even ionizers and certain types of purifying machines.

2. Asbestos – this can be found in older homes and buildings because of their durability. They tend to cause pollution in the air and can cause mesothelioma or even lung cancer.

3. Carbon monoxide – this is commonly found in furnaces and HVAC systems, so make sure you test it carefully and have a professional inspector to take care of it. Poisoning can happen so it is important that your home is free from such a toxic gas.

4. Mold – this can potentially cause respiratory problems as well as mild allergies. Mold can go alongside pollen and dust that can potentially trigger allergy attacks on people. Mold happens when there is too much humidity at home.

5. VOCs – volatile organic compounds can be found on most office equipment as well as paints and coloring products. They can cause dizziness as well as headaches because of their bad smell.

6. Smoke – this can be in the form of cooking smoke, secondhand smoke or even fireplace smoke, so make sure you minimize the smoke around your house by adding ventilation to your home setting.

7. Radon – this can be found on some old buildings and homes and they can only be checked by professionals if you think there is radon poisoning in your area.

Q: Do AC units purify the air?

A: An AC unit can potentially have a purifying mechanism if you find that it has an air filter. If you want a 2-in-1 mechanism for cooling your home as well as purifying the air, it is therefore important to invest in an AC unit that can help purify the air while keeping your home safe from pollutants indoors.

Q: How does the purifying machine compare to vaporizers and humidifiers?

A: These three units or machines can differ from each other with the following criteria:


Air Purifier




For purifying indoor air in your house or office

For adding humidity or lessening humidity at home or in your office

For releasing hot steam for respiratory problems

Technology used

Uses filters, some also use UV technology and ionizing function

Some use steam, ultrasonic waves or blowing technology

Most use steam technology

Problems encountered

Unclean filters may not work properly

Stagnant water may form mold at home

Can cause house fires because of its heating property/mechanism

Q: Which is better for allergies: an air purifier or a humidifier?

A: Generally, for allergies, you can use both of these appliances or machines but it is better to get a humidifier first because:

1. You need to keep the humidity just right, to about less than 50% because most allergic reactions come from humidity changes in the atmosphere.

2. Dust mites and mold can have less chances of surviving if you set the humidity just right.

Q: How do I know that I have nasal allergies?

A: Allergic rhinitis or nasal allergies are some of the most common things that can happen if you have pollutants indoors. Allergies can have the following symptoms:

1. You tend to have a stuffy or runny nose, and it’s not a cold.

2. You start to get watery eyes because of some pressure on your sinus area.

3. You constantly sneeze for no reason whatsoever, or due to dirt.

4. Gooey stuff drip from your nose, and you know you don’t have a cold.

Q: How do I keep pet allergies at bay?

A: To keep your area pet-friendly and allergy-friendly at the same time, here are some things you can do to help out:

a. Use a purifying machine to clear out pollutants.

b. Limit the places where pets go into the house.

c. Consider cleaning your rooms much more frequently.

d. Be hygienic by washing your hands often.

e. Get medication for allergies or allergy shots if it gets worse.

Wrapping Up

There are many you can choose from out there, but we think the Alen Breathesmart is probably the best air purifier for most people, with its high CADR, WhisperMax technology and unlimited lifetime warranty.

Leave a Reply to VS Chaitanya X


  • Particulate Matter, Also called PM 2.5 is one of the primary contributors to Air Pollution. Constant exposure to PM 2.5 Particles is very risky for our health. The PM 2.5 is so small that we don’t even notice that they get inside our lungs. So, if you live in a heavy traffic or polluted area, It is better to go with an Air Purifier that comes with a PM 2.5 filter.

  • Wonderful list. I bought an air purifier after moving to an apartment that was next to a construction site. Needless to say it was quite essential – getting rid of all that dust otherwise would have been a nightmare. I like both Alen and Rabbit Air air purifiers.