Air purifiers are devices that have the function of removing dirt with tiny sizes and allergy-causing agents in the air, such as bacteria, mold, pollen, by suction, filtration and retention of contaminants infection through standard grade HEPA filter dust or the ability to remove unpleasant odors with activated charcoal. Thanks to features air cleaning, deodorizing effectively improve the living environment of air purifiers which should become important items in every household. In this article, we will learn how does it works and Step-by-step Buying Guide to find the best Air Purifier for your need.

Benefits of Air Purifier

Many users are confused about the real effects of air purifiers. Not many people believe that the main function of this device is a humidifier. However, air purifiers are used for more. If really you only need to create moist, find yourself a humidifier device costs just a few hundred dollars that are being sold very much in the market.
Air Purifier has the main functions: deodorant, clean air filter and removes dust, bacteria, viruses, allergy causing agents, mold … and natural moisture to the air.

Healthy Air Benefits

Unlike conventional humidifier, air purifier using waterproof membrane system through blower to put the natural moisture in the air. Thanks to the sensor so the air purifier is controlled best for human health.
Thus, the air purifier is a combination of features hood, clean air filtration, and moisture balance for lack moist environment. In environmental conditions and weather in many countries with large levels dust and pollution, owning an air purifier is really necessary. In particular, air purifiers will be helpful to the closed room or room using air conditioning and dry weather pattern.

Best Air Cleaner for Smoke, Allergies, Dust, Pets,…

In addition to the purpose of family’s health, below are some kinds of air purifier for other different uses:

Air Purifier for Smoke

Air Purifier for Smoke

Nobody can deny the terrible influence on health of smoke, not only on the smoker but also the others in the same living space. Tobacco or cigarette contains many harmful ingredients such as carbon monoxide, soot, volatile organic compounds (VOCs), so forth and so on. Therefore, if you intend to get a better life, you can think about buying an air purifier for smoke.

We will recommend for you some of the best air purifiers for smoke to consult. To choose, you need to keep in mind these features to make the right decision.

  • HEPA filter: An air purifier for smoke has two main functions. One for removing the bacteria and mold, and the other for smoke and cigarette. With the HEPA filter, it will do a good job at the first mission so, while choosing this kind. Therefore, remember to keep an eye on the HEPA filter.
  • Activated carbon filters: while the HEPA filter holds the mission of removing bacteria and mold, this kind of filter is used for the second function. And this is the most important feature you need to consider.

To ensure the quality of the air purifier, you need to choose a famous and trustful brand specialized in providing air cleaning device.

Some matters to notice while using an air purifier for smoke:

Surely, many of us will wonder that if an air purifier has the ability to stop the negative effect of smoke or cigarette. Unfortunately, the answer is not. An air purifier is just doing the function of making the air clean and clear of bacteria and mold while in the smoke, there are tons of toxic ingredients, they are not bacteria or mold. BUT the air purifier can REDUCE the levels of smaller airborne particles. The similar situation with cigarette, the device just decreases the harm of these toxics, not remove 100% effectively.

Recommended Products:

Air Purifier for Dust and Pollen

Dust in House

Mainly, air purifiers using HEPA Filter handled Pollen or Dust very well, however, they cannot eliminate completely all kinds of dust but just limit them. Many customers purchase an air cleaning device with the hope of getting rid of all dust and pollen, and it ends up with dust still on the floor making them so disappointed. This is all because many of us have been thinking in wrong way about this machine.

An air purifier takes the responsibility of removing dust and pollen, but just the tiny particle flowing in the air which bothers us and causes sickness by absorbing to the lungs through breathing in the nose. The dust we can see on the floor is much heavier and contains a large amount of dust, so they will land on the floor before the air purifier draws them in. Besides, this kind of dust can be cleaned by the vacuum cleaner easily. They do not bother us but our house.

To take this responsibility, the most important part of the machine is HEPA filter, which was design in the 1940s. It is considered as a device which can capture the tiny molecules sizing down to 0.3 microns with 99.97 percent efficiency. This very small size is rather hard to capture but just some special machines but the easiest to fall into our lungs. When drawn into the air purifier, the air will get through the filter easily but these molecules will be trapped in the fibers. Even though an air purifier cannot remove all the dust, however, if you use it usually, the device will offer the best reduction of dust.

Recommended Products:

  • Blueair 603 HepaSilent Air-Purification System or device with high Clean Air Delivery Rate

Air Purifier for Pets, Odors

Air Purifier for Pets

For those who have allergies with pets such as dog, cat, and many other domestic animals, it does not mean that you cannot own a pet at home. Just an air cleaning device to make sure the atmosphere in your living space always clean and free of pet odor, pet hair, dander… is okay. From that point, the best and also the most popular device is air purifier with HEPA filter. However, like the kind for dust and pollen, this one just can do the best reduction of pet dander, hair, and so on. To get the best efficiency, you need to combine with vacuum cleaner, especially for those who own a German Shepherd Dog, that shredders around the year.

Recommended Products:

Air Purifier for Allergies, Asthma

Asthma and Allergies

For those who have allergies, you will understand how unpleasant of the symptoms cause to you: running nose, sniffle, sneeze, and wheeze as well as how much effort in reducing those nuisances. If you are still finding a way, an air purifier is the best choice. To choose the best air purifier for allergies and asthma, you should keep in mind those questions before making decision:

  • Which things will be removed from the air by the device?
  • Does it have the HEPA filter?
  • Which size of room can it work well?
  • What is the CADR rate of it?
  • Does it easy to change the filter?
  • How often do you have to replace a filter? And how about the cost?
  • Does it run quietly while you are sleeping?

An air purifier is recommended by both the U.S. Environmental Protection Agency (EPA) and the American Lung Association that it just works well in keeping the surrounding air of user always clean and clear of molecules causing allergies, and improving your health, not healing them directly. The operation of an air cleaning device for allergies and asthma is the same with one for dust. When the air is drawn into the purifier, pollen, dust, pet hair…will be trapped in the HEPA filter and flow the clean air into the room. But with this kind, you do not need to use a vacuum cleaner combined.

Recommended Products:

Air Purifier for Mold

Air Purifiers for Mold

Many of us keep thinking that mold is what you can see on the wall after a long time experiencing the high moisture, but it is not true properly. The horrible truth is that mold exists everywhere, you just cannot see it. The benefits environment for mold to grow is moisture. So, if you want to limit mold, you need to limit the moisture and keep it in balance. If you are allergic to mold, it is even more terrible because of the symptoms you have to pass through with eyes, nose, skin, and so on. If you want to get rid of mod, you need to take notice of air cleaning device such as air purifier for mold to keep the moisture level always under 50%. Similar to the ones for asthma, allergies or pollen, you need to choose the HEPA filter or High-Efficiency Particulate Air filter.

It is advised to use the air purifier which is made from famous brands specialized in air purifier for mold removal from the air with the HEPASilent® technology which can take the responsibility of removing 99.97% of airborne particles down to 0.1 microns in size. Alongside these main functions, you can choose some more extra functions such as SurroundAirTM technology to remove mold well or a magnetic filter timer, remote control…. Besides, do not forget to buy a device with high CFM as well.

However, you must know that an air purifier just takes the function of eliminating mold spores, not solve any basic problem of mold growth so that while using this device, you need to combine with hygrometers and humidity gauges to control the moisture levels in your living space. And as mentioned above, mold needs moisture to grow well. From that point, if you choose a cheap and low-quality air purifier, it will give you the opposite effect. Why? Because cheap devices are usually made of paper – cellulose. When using those air purifiers, they will accidentally become the benefits environment for mold to grow quickly. Thus, do not afraid of the high cost at the moment to earn a big consequence in the future.

We highly recommend using Honeywell or Alen BreatheSmart HEPA Air Purifier

READ MORE: Best Dehumidifiers for Mold and Mildew

Top-Rated Air Purifier Reviews

1. Honeywell™ 50250-S 99.97% Pure HEPA Round Air Purifier

Honeywell 50250-S 99.97% Pure HEPA Round Air Purifier
Our Rating: 4.7 / 5

The Honeywell™ 50250-S is a useful machine that is very suitable to use in small spaces, such as rooms with the area about 390 feet. It has high performance with high speed of moving out the dirt, pollen, and smoke in the room and the same thing with lower speed. This kind is one of the least luxurious air purifiers available in the market and the HEPA filter is very durable as well as very cheap to replace.


  • Affordable price
  • High speed of moving out the dirt, pollen and smoke
  • Durable, low cost in replacing filters
  • Large cover Area: up to 390 square feet in size and high CADR rate in 250


  • Just perform well in small space
  • Create loud noise when it is on high speed
  • Not Energy Star-qualified

2. GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction

GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction
Our Rating: 4.5 / 5

GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction has the size of 22 inches with a wide range of levels of cleaning to remove allergens, dirt, and pollen. It is also able to get rid of all airborne viruses and bacteria, as well as kill mold, and free odors. It is the best machine to use in medium-size spaces and gets high CADR rate.


  • Super lightweight
  • High speed
  • Can use for large room
  • High power
  • Full functions such as HEPA Filter, UV Light Technology, No Ozone…
  • Large cover Area and high CADR rated 100+


  • Too bright light
  • High cost of replacement filter

3. Holmes HEPA-Type Desktop Air Purifier, 3 Speeds plus Optional Ionizer, HAP242-NUC

Holmes HEPA-Type Desktop Air Purifier
Our Rating: 4.6 / 5

Holmes HEPA-Type Desktop Air Purifier, 3 Speeds plus Optional Ionizer, HAP242-NUC has excellent filter which is bale to remove the entire airborne molecules in addition to allergens of the air in a determine space. Besides, it has the carbon filter which helps to limit the unpleasant smells up to 44%. One more plus point for dual-position and nice outlook that is very suitable for desk or desktop. Good filter changes indicator and the last long three-speed level motor. This kind is very suitable for medium size rooms.


  • Lightweight
  • Large cover Area up to 109 square feet and Smoke CADR 70
  • High speed
  • Full functions such as HEPA Filter, UV Light Technology, No Ozone…


  • Loud noise

4. Whirlpool Whispure Air Purifier, HEPA Air Cleaner, AP51030K

Whirlpool Whispure Air Purifier, HEPA Air Cleaner
Our Rating: 4.5 / 5

This is considered as the best air purifier for anti-allergy and very good at removing smoke and cigarette from the air in the area of 500 square feet with the filter combined by 3-stage layers of filter technology system can take the responsibility of removing 99.97% of airborne particles and work very silently. The Whirlpool Whispure Air Purifier AP51030K contains a filter system with three stages which include a pre-filter, carbon filter, and true HEPA filter. The pre-filter plays an important role in capturing all the large negative molecules and preventing them from entering the unit.

Alongside these main functions, this device also includes the carbon filter in the second stage to remove odor very well and some more useful functions such as 4-speed fan. It also has high CFM which is up to 315 for all the tobacco smoke, dust, and pollen.


  • Work very well in large room with the area of 500 square feet and can purify air 4.8 times per hour
  • It is very easy to use the electronic controls as well as runs very quietly that can be used in bedroom very well
  • Use true HEPA filter with 0.3 micron
  • Has high CADR rate which is up to 315
  • Contains 4-fan-speed modes in addition to the sleep and turbo modes


  • Heavy and large

5. Winix WAC9500 Ultimate Pet True HEPA Air Cleaner with PlasmaWave Technology

Winix WAC9500 Ultimate Pet True HEPA Air Cleaner with PlasmaWave Technology
Our Rating: 4.5 / 5

This unit considered as the best air purifier for pet hair removal from the air in the area of 284 square feet with the True HEPA technology can take the responsibility of removing 99.99% of airborne particles down to 0.3 microns in size. Alongside these main functions, this device also includes Plasma Wave that works differently than many other air purifiers and some more useful functions such as remote control, 4-speed fan, sleep mode, and Energy Star Qualified. It also has high warranty and guarantee. Below are a few outstanding features of it:

  • The True HEPA technology can take the responsibility of removing 99.99% of airborne particles down to 0.3 microns in size…
  • Include control carbon filter
  • Pre-Filter to trap Pet Hair and larger airborne particles.
  • Plasma Wave technology to capture viruses, bacteria, odors, and gasses in the air
  • Smart Sensors with Auto-Mode, Odor, Dust and Light Sensors.

6. Alen BreatheSmart HEPA Air Purifier with SmartSensor and WhisperMax Technology

Alen BreatheSmart HEPA Air Purifier with SmartSensor and WhisperMax Technology
Our Rating: 4.4 / 5

This device from Alen Corp seems to be the most effective air purifier for mold removal in the area of 1.100 square feet with the HEPA filter can do the function of removing 99.8% of airborne particles.

Besides, it also has the simplest and newest way to use. Alongside these main functions, this device also includes some more useful ones such as fan speed control and air quality indicator light for changing the new filter. Below are a few outstanding features of it:

  • Remove up to 99 percent of airborne particles in the area about 1,100 square feet
  • Make the air cleaning become easier with SmartSensor a WhisperMax technologies
  • Multiple layers of filter technology help to clean air effectively
  • Built-in indicator light to inform replacing the filter, Versatile HEPA type filter options
  • Offer 7 designer panel colors and 4 filter options for each individual demand.

7. O-Ion B-1000 Permanent Filter Ionic Air Purifier Pro Ionizer with UV-C Sanitizer

O-Ion B-1000 Permanent Filter Ionic Air Purifier
Our Rating: 4.1 / 5

O-Ion B-1000 Permanent Filter Ionic Air Purifier Pro Ionizer with UV-C Sanitizer has the ionic/electrostatic technology that can last for very long time. It uses the UVGI technology standing for utilizes ultraviolet germicidal irradiation to purify the air. Additionally, the device contains the carbon filter to limit the unpleasant smells and the electrostatic purification to get rid of and limit the entire airborne pollutants as well as the irritants, in order to offer the clearest air for your family to breathe easily.

The Pros:

  • This device performs very quietly
  • The structure of nightlight feature is handy
  • The size is ok and useful
  • Very economic and friendly with environment
  • Include the Electrostatic Ionizer Purification
  • Carbon Filter and Ozone Power
  • UVGI technology

The Cons:

  • After running the device for about 6 to 8 hours continuously, the plug gets hot quickly.
  • It does not very effectively get rid of all allergens out of the air like the other products with the same prices

8. Coway AP-1512HH Mighty Air Purifier with True HEPA and Eco Mode

Coway AP-1512HH Mighty Air Purifier with True HEPA and Eco Mode
Our Rating: 4.6 / 5

The Coway AP-1512HH Mighty Air Purifier with True HEPA and Eco Mode has the compact design with the HEPA filter to make a 99.97% efficiency in addition to the filter system of four stages to effectively get rid of the unpleasant odors and pollutants. Besides, this kinds contains the air quality indicator through the particle sensing technology to help the machine to perform well whenever you need. The final plus point is the automatic fan that can stop itself if the pollutants are erased all to save energy.

Besides, the Coway AP-1512HH Mighty Air Purifier with True HEPA and Eco Mode has the light that will bright up when the filter needs to be replaced to make sure the air purifier always run well. It is very ideal to change the Carbon filter approximately every 6 months and the HEPA filter annually.


  • Have HEPA Filter, CADR rated
  • Quiet operation
  • No Ozone
  • Clears Airborne Allergens
  • Have Carbon Filter
  • Large cover area up to 326 square feet and high CADR rate in 210CMF
  • Easy to Clean and use


  • Do not have UV Light Technology
  • Heavy and large

9. Blueair 603 HepaSilent Air-Purification System

Blueair 603 HepaSilent Air-Purification System
Our Rating: 4.5 / 5

This is considered as the best air purifier for dust removal, smoke from the air in the area of 698 square feet with the HEPASilent® technology combined by multiple layers of filter technology system can take the responsibility of removing 99.97% of airborne particles down to 0.1 microns in size. Alongside these main functions, this device also includes 5 air changes per hour and SurroundAirTM technology to remove dust and pollen very well and some more useful functions such as a magnetic filter timer. It also has high CFM which is up to 450 for all the dust and pollen.

Below are a few outstanding features of it:

  • Dust removal from the air in the area of 698 square feet.
  • The HEPASilent® technology combined by multiple layers of filter technology system can take the responsibility of removing 99,97% of airborne particles down to 0.1 microns in size.
  • High CFM which is up to 450.
  • SurroundAirTM technology helps to clean air six times larger than the normal air cleaning device.
  • Magnetic filter timer automatically informs when to change the filter.

How does Air Purifiers work?


Air purifiers operating on the general principle is to use the dust deposition by ionization of harmful substances in the environment. Based on the principle elements of the opposite charges will attract each other, the machine uses technology emits negative charge in the air, neutralize the charge symmetry is the harmful positive ions in the environment and create effects attract dirt, bacteria, fungi … The negative ions also stick to the toxic elements in the air and positively charged electrostatic membrane in the machine will attract and keep these elements again.

In the closed room, where equipment such as computers, printers, television, neon lights … are used, the device emits many positive ions harmful to the body, air purifiers will provide ion audio and air conditioning. Environment dusty, musty air is not circulated well as birthplace and hidden by many bacteria, O2 filter and activated carbon filters will work to enhance oxygen, capturing bacterium and dirt filter. Many types of air purifiers are also additional blower, or functional moisture spray, oil spray fragrances.

Types of Air Purifier

In the market today, there are about 5-6 types of air purifiers are derived from countries and territories. In general, these types of air purifiers in the home are sold on the market today include HEPA Technology, Air Ionizers, Activated Carbon Technology, UV Technology, and Ozone.

1. HEPA Technology

HEPA_Filter_diagramHEPA stands for “High-Efficiency Particulate Air” and is a technology developed by the Atomic Energy Commission in the United States during the 1940s with the aim of creating an efficient method of filtering radioactive particles polluting. This device was developed in the era of the Apollo space exploration.

Basically, the HEPA filter included a grid of randomly arranged fibers. The fibers typically include glass fiber and have a diameter of 2.0 micrometers and 0.5, so the filter can trap a large number of very small particles which cause asthma and respiratory allergies. Typically, the vacuum cleaner is not equipped with an HEPA filter to waste such small dust particles back into the air in the house.
HEPA filters can filter most substances from the air, size down to 0.3 mm.

They are helpful in filtering pollen, spores, fur, and smoke. According to WebMD website specializing in medical news has reported the researchers from Queensland University of Technology (Brisbane, Australia), an HEPA filter is said to remove 99.9% of pollen, animal hair, and even bacteria from the air.

2. Air Ionizers

This device also has another name which is negative ion generator. It makes use of high voltage to ionize the air particles. Most nowadays air purifiers available in the market are made to create negative ions which have one or more additional electrons to make a net negative charge to the molecules. The opposite side of anions is cations which also have one or more electrons but the different point is to create the positive charge. One more different kind of air ionizer is the ESD ionizer, which has the function of neutralizing static charge.

3. Activated Carbon Technology

Filter charcoal deodorizer was widely applied because the absorption capacity and effective deodorizer. When air passes through the activated carbon filter, the air deodorizing charcoal will be included in the cleaning system; these bacteria are also flying in air activated carbon retained. Activated Carbon Filter deodorant not only apply to consumer products but also our application of purification of air to the plants, or those professions that odorous gas emissions affecting the environment as well as the environment surrounding our lives must pass gas treatment with activated carbon filter deodorizer. Such as spraying paint wooden furniture, industrial kitchen…

Activated Carbon Technology

With activated carbon filter to deodorize not only the exhaust treatment system, but also one water purification systems effectively, surely everyone knows today the constant drinking water filtration system has one layer of activated carbon to adsorb and treat the bacteria or impurities in the water and air. We can say the deodorizing charcoal filter has contributed to the protection of the natural environment today, and can also say that it’s one product associating with human health.

4. UV Technology

UV applications are rushing released together with the advertisement impressions: can “knock out” many bacteria dangerous to human health, such as E.coli, pneumonia, Staphylococcus, Influenza … is 99%, even up to 99.99%.
Compared with methods of chemical disinfection tangle calendar size and easy to residual substances such as chlorine and ozone machines before, the application of UV disinfection technology is manufactured based on the method of physics compact.

UV Technology

Accordingly, manufacturers will manufacture the lamps can emit artificial UV rays that can kill bacteria. When water, air or manipulated exposure from purple light contact to this, these bacteria will be destroyed.

According to many experts, physical pasteurization method (UV, infrared …) is better than chemical methods so they are encouraged to use. It is said that processes by physical methods will not leave chemical residues. On the other hand, the time of exposure to UV disinfection just 1-3 seconds when using chemical sanitizer takes 10-45 minutes. Therefore, UV lights which are put into the market would become cult quickly.

5. Ozone

When the ozone decontamination operation, the machine will produce ozone, a gas with a high oxidation ability, completely eliminating toxins, bacteria, dust … out of the air. Helping the air fresher, and avoid respiratory diseases and allergies.

Not only applied to produce ozone machine technology family that ozone is also used to generate ozone machine industrial products dedicated to wastewater treatment, potable water … for residential, home factory, school, hospital, industrial parks ….

For some machines using ozone technology, they should not be used continuously, but only let the machine operate in ozone regime in a certain time (when there is no longer smell in the room), because if ozone is overused, it is not good for health.

Features to Look for in a Best Air Purifier

• CADR (Clean Air Delivery Rate):

CADRIt is preferred to quality. CADR aims to the CFM standing for cubic feet per minute of air that had entire of molecules of a determined size issuing moved out. When air is flowing through the air filter, it will hold back a small amount of these molecules which have the particular size distribution moved out from air after flowing through the CFM.

For more details, in a room of 28.5m3 with 1.008 CFM air cubic feet, there are full of determined size distribution of air and which have the higher rates will be held back naturally. Different filters will offer different abilities to get rid of many kinds of molecules but the 3 main CADR are usually the smoke, pollen, and dust. By matching the number of flow of air and particles removal efficiency, consumers are limited to be tricked by a high-efficiency purifier small quantities of the filtered air, or by a great number of aircraft that is not very good at purifying.

• Adjusted Area Coverage:

Each purifier has a capacity of gas flow and filtering to suit each specific area of use. If users buy a product with a lower capacity than the going to use area, it will effectively filter unwanted. When using large-capacity machines for the narrow area of the back room wasted because price and power consumption of the refinery is not small.

In the market, there are three types of air purifiers family with usable area are: 20-22m2, 30-35m2, and 42-45m2, corresponding to the maximum power is 30-37W, 40-47W, and 45- 50W.

Air Purifier Cover Area

For bedrooms are usually small in size, you should select the type of 20-22 m2 with compact size room and space, saving sleep mode function, bactericidal mold well. Guestrooms are generally acceptable for refinery 30-35m2, which functions like smelling odor filter tobacco smoke.

The room that has large area, such as the dining room through the kitchen or common kitchen with the living room, is better to use the machine type for 40-45m2 area with functional hood. These machines have the designed larger windmills set and larger filter which is proportional to the size of the refinery in order to suck air filter efficiency in large spaces.

• Noise Level:

The noise level is another element that you need to consider while choosing an air purifier because a device that is too noisy will make you uncomfortable while sleeping or working, especially for the baby. About the noise level comparison, first of all, you need to get knowledge.

  • From 10 to 15bB, it is quite.
  • If the noise is 20dB, it is like the sound of leaves falling.
  • From 20 to 40dB, it is average.
  • If the noise is 30dB, it is like the sound of wind
  • From 40 to 50dB, it is the a little bit loud
  • If the noise is in 40dB, it is like the sound in a library
  • From 50 to 55dB, it is the maximum of a machine can cause.
  • If the noise is in 50dB, it is like the sound you are in a normal workroom.

While making a decision, you need to choose the air purifier that has the maximum noise level under 55dB and if it has the silence working setting, it will be better because the noise would decrease very much and most the user will not notice about that.


HEPA stands for High-Efficiency Particulate Air, and true HEPA filters are considered as the ultimate crystal filters. It was invented during World War II, when the Atomic Energy Commission needed a filter to protect the researchers radioactive particles could be dangerous for their health.

HEPA trap particles as small as 0.3 microns with a rating of 99.97% efficiency. The parameters we have to understand when calculating and selecting HEPA filters: Traffic and wind speed, performance HEPA filter products, size of HEPA, HEPA filter area, so forth and so on.

Other Optional Features

Filter Reset
Normally, this feature is not as important as the above ones, but with those who have allergies such as pollen allergies you should pay attention to this. In addition to some main options like air purifying and creating moisture to make your skin look more beautiful, you need to focus on those which have the remove allergens (pollen) option.

For those who have a sensitive noise, you need to choose one more optional setting of deodorant that helps to free odor and change the structure of these particles and make them useless, creating the properly clear and clean atmosphere.

Speed Control
By adjusting the rotational speed of the engine, this function helps to reduce power consumption, which leads to saving energy efficiently. This function is very suitable for those who are on tight budget or want to save money while using the machine.
Air filters shall include types with texture and different uses: membrane filtration, HEPA filters, and activated carbon filters with different models to ensure airflow comes out always purest. Each filter uses a different technology and the strength of each manufacturer. As for technology, the air purifiers in the market today use four main purification technologies: filtration with negative ions, ozone filter, UV filter compound Ti2O or leach and oils. Depending on the technology used by purifier and utility sells different filter suitable for each object used.
In which the filter effect retains coarse dust, bacteria, and allergens.
Asthma and Allergy Friendly
When choosing to buy air purifier, you should note that choosing products from prestigious brands, in particular the products manufactured in Japan often have features and advantages over. Also, good air purifier must have certification from the reliable evaluation agency of the ability to effectively remove allergy causing agents, typically the Research Association of British allergens (Allergy UK).

Currently, some brands of air purifiers are certified by Allergy UK application of advanced HEPA filter size large, multi-layer structure, this air purifier is capable of effectively filtering the dust particles ultra-small size from 0.1 to 2,5micromet same allergenic agents with regional conditions the air filter should be closed. PM2.5 is only indicative of the standard concentration of floating particles in a cubic meter of air. The higher this index is, the more serious the air pollution is.

To make sure your air purifier would actually work in the space where you plan to use it, check if it has reasonable coverage or not. Manufacturers often talk about the number of times air change takes place in a certain time, but the measurements between the companies have very little standardization.

To compare with the coverage of the machine should be considered, you must determine the size of the room in which the air flow allows the air to be changed four times in an hour. If an air purifier can only make one air change per hour in a large room, it is not suitable for large rooms. However, on the contrary, if it is able to make four changes per hour air in a small room, the filter is suitable for small rooms.

Cleaning Cycles
To be effective, an air purifier must have a motor attached to a propeller to help draw air into the unit to filter through various types of filter media. Clean air is blown back into the environment to start the cycle over again. From the moment the air from the outside environment is drawn into the machine to when pure air is blown back is called the cleaning cycle. You should choose a machine with fast cycle to be able to shorten the time to clean the air in a given space, thus helping to save energy.
The use of fans has a huge impact on the amount of air to be sucked into the air purification to thereby generate fresh air and blown back into the room. When selecting air purifiers, you should pay attention to details and select suitable rotor motor for an area of the room you intend to use the machine.
Servicing indicator
A dirty air purifier will run inefficiently. You ought to get rid of and clean the electronic precipitator’s collector-plate gradually per month or more. (You can wash the device in a sink and a tub, or place the device in a dishwasher to do the job more easily.) For those machines used in normal room or for the entire house with the electrostatic precipitator or the HEPA filter with ionizing circuitry, they will have the lights to inform when you should replace or wash the filter very conveniently.
Dust sensor and air-quality monitor
Last but not least, after choosing the suitable elements above, you need to complete by considering the dust sensor and air quality monitor. Choose the machine that has clear monitor and suitable light so that you can see the number and information on it easily without being too dazzle or too dark.

For those devices used in rooms, the fan speed will be raised or decreased automatically but the users often do not notice that until the pollutant rates in it are higher and higher, and end up with the automatically shut down prior to the levels fallen down.

Other Considerations


The selection of the operating characteristics of the machine depends on the needs and the space used. In the bedroom or children’s room should feature clean kill bacteria; living room should eliminate odor of cigarette smoke; Kitchens need to remove the smell of food, gas…

As needed, you can also select air purifiers with or without humidification function. If use in air-conditioned rooms, the selection of air purifiers with humidifying function would fit very well.


As devices directly influence the health so when buying air purifiers, should only trust products of reputed brands and clearly proven. The air purifiers from the major brands are good quality, beautiful design, and high reliability with varied prices. Depend on capacity, filtering technologies and features, the air purifier priced imports ranged from hundreds to thousands dollars. For some large capacity models, using filtering technology with light and TiO2 compound is priced up to 1200 dollars.

The type of air purifier uses leach technology and oil is priced above 2 million or more or the machine using ozone purification technology cheaper, less than 50 dollars. But users should also be careful when using this type of ozone purifiers.

Safety Use

Avoid Ozone TechOzone plays an essential role in the atmosphere but for human being air, it will be toxic which can cause chest pain, coughing, shortness of breath, and throat irritation if it is over the determined level. So, for those air purifiers using the ozone technology, for example the ozone generators, they will create ozone like a by-product. From that point, after making the research, if you find that an air purifier releases ozone, let’s change your decision.

If you intend to buy an air purifier for your home, the best choice is a true HEPA filter and Charcoal Based Activated Carbon filter because they will purify and hold back well all the airborne molecules and chemicals creating harms for baby. Because the lungs of babies are still developing and very sensitive, it is essential to make the air as clean as possible.

Support and Warranty

Among countless brands of air purifiers, all kinds were advertised as quality and efficiency, you should only choose the big brands which have credibility in the market for decades. The brands on offer air purification products GENUINE QUALITY STANDARDS and accredited worldwide. Also, with a network of service centers in all cities across the country, you will be assured of service and the spare server as needed.

You should choose where to buy reputable products; it is best which specializes in air purifiers. When specializing in air purifier, you will be advised hearted and most accurate product, which will choose the best air purifier and most suitable for your needs. Also, since specialized in air purifier, you will get interest of very professional and reassuring customer care after purchasing.

Replacements and Filters

air Purifier ReplacementsIf you’re using an air purifier with a filter, you should replace them by following the recommendations of their manufacturers to preserve the machine in the best way with high level of pollen and pollutants removal. Due to a number of filters your air purifier contains, you ought to replace them at different times.

For example, if your air purifier uses the HEPA filter, it will be ideal to change the filter one per year while the activated carbon one needs to be replaced for about 6 months and the pre-filter is for 3 months. When making decision for an air purifier, make sure that you understand clearly about the fee and frequency of future filter replacements.

Air Purifier vs Humidifier

Basically, the structure and the operation of a humidifier and an air purifier are completely different, namely those differences are as follows

Humidifier is the device for adding moisture to the air in the room where the humidity is low. Air humidity that reaches saturation level, will bring fresh atmosphere, more pleasant to bring more benefits to the skin and respiratory system of human beings, especially in the winter.

Each machine can produce moisture in a determined space with the adequate area and its surroundings, and to diffuse them more gradually, a fan must be used to blow the moisture. The principle of operation of this machine is to use high-frequency sound waves to turn water into nano-scale molecules and blow into the air as mist.

There is a benefit from a humidifier that not all people will know: it is contributing to room temperature in cold weather. Saturated humidity will cause at higher temperatures. This helps cut energy costs.

  • Air Purifiers:

This device can remove a few kinds of micro-sized dirt and many different contaminants in the atmosphere such as common diseases like cold and flu, pollen, dust particles, by a mite filter standard layer named the HEPA or the activated carbon layers. Air Purifiers have a wide range of sizes to fit many different room areas.

Air Purifiers is also useful for those people who have allergies to mold or the asthma history. Once air is withdrawn into the device, it will be filtered and changed into the cleaner air, and can be removed a few kinds of odors, for examples smoke or odor – causing bacteria, so forth and so on.

Yet, there is a device which is already integrated both functions of the air filter and humidifier at the same time. This machine can undertake both the above functions, while providing additional moisture to the air, and can filter out the dust in order to create fine atmosphere as much as possible.

Air Purifier vs Air Conditioner

  • Air Conditioner:

Portable Air ConditionerAir conditioner is a household appliance designed to cool the air and withdraw heat from a unit area. The cooling is done under the refrigeration cycle.

The purposes: Usually, it is used in summer, when the weather is hot, to cool the air.

How to work: In closed rooms, putting in a manifold; a volatile liquid (called cold gas) will be evaporated inside the manifold and at a low temperature; it will attract the heat of the air in the room (is blown by fan through the evaporator). Hot air in the room will lose heat and the temperature will be lower down.

Evaporated cold gas will be led to the compressor (block), and is compressed to high pressure, high temperature, and then move to condensation manifold placed outside the room. Compressed steam in the condensation manifold with high temperature will be transferred easier to the outside air. Now, the heat inside the manifold losing heat will condense into water, flowing through the capillaries, to decrease the pressure & temperature of the fluid down and go into the evaporator in the room, the working cycle is closed.

However, Air Conditioner makes the air dry which will cause dry skin, eyes and throat for the users.

  • Air purifier:

Air purifier is a household appliance designed to filter the air and eliminate molds and bacteria from a unit area to offer the clean and pure air.

The purposes: Especially good for those who have allergies with molds, bacteria and so on, in addition, helping improve health and the surroundings of the users, providing negative ions to strengthen oxygen and purify the air in the room

How to work: Air purifiers use the HEPA standard to filter the air in the best and safest way, in addition to the high voltage to make the arc, create negative charges into the air, neutralize the harmful positive ions and collect dust into the machine. So, the negative ions will stick to those molecules and a positively charged metal sheet in the machine will absorb them.

Note: Air purifier does not make the air dry as well as taking the function of cooling the air.

Trusted Brands on the Market

Currently in the market, air purifier firms mushrooming in which air purifier manufacturers from Taiwan, China, Japan or Europe. This will make the market more variety of air purifiers, however, it makes users fall into a matrix that manufacturers put out.

Consumers wonder if selected types of air purifiers are best for their family, this section will introduce you to some famous brands for your reference:


Holmes Humidifier Logo

Holmes is a famous brand which is specialized in providing air purifier with high value, innovation, and good quality to the consumers. The marketing strategy for this kind of product of the company is clean “comfortable” air. You can find it easily on Target, Walmart, and Sears. Holmes is proud of its exclusive technology which is combined the power of Holmes and the most effective filter technology at the recent time. This increases 30% the effect of dust and airborne molecules removal when the indoor air is flowing through the filter in addition to making Holmes become the leading brand with the highest CADR cleaning power.


Honeywell Logo

Honeywell was firstly set up in 1906 as a hot water heat generator company with well-established tradition of providing safe, trustful, and high-quality products. Many allergists consider that the HEPA technology in air purifiers of Honeywell is the gold standard in air purification.

In fact, many doctors also advice their victims to use Honeywell air purifiers than any other brand. This kind of technology can remove 99.97% of all popular molecules like dust, pollen, cigarette smoke, and allergen. Besides, by using Honeywell glass-fiber HEPA, you do not need to spend much money on chemicals or ultraviolet bulbs to get rid of airborne molecules.

This is a mass-market brand which has the widely online merchants like Walmart and Target with a “value” proposition.


GermGuardian has a wide range of home environment products from air purifier to humidifier with innovative technologies and powerful devices which aim to help people stay healthier, happier, and more convenient at home or living spaces from all over the world through the mass retails.

By the vast retailers to develop and sell products such as Walmart, Target, Lowe’s, GermGuardian becomes a famous and trustful brand name.


From its name has told everything, this kind uses electrically charged surfaces to make the ion charging to reach to the airborne molecules which will become electrostatically charged and are stuck into to the charged collector rod in this purifier, thereby get them rid of pure air. One plus point of this kind is that the air purifier runs very quietly and has the eco-friendly design. Besides, O-ion also has a good support for customer.


Winix is a South Korean manufacturer which has more than 40 years of business in air purifiers with the pride of providing nice design and high-quality products to offer clean air, and comfortable living. With the hope of offering the most comfort to users when they are indoors, Winix gradually receives many supports from the customers and becomes one of the leading brands in the producing goods for living world. Besides, this brand is also well-known for high performance and nice design as well.


Blueair Air Purifier is based on the belief of “breathing air as pure as nature intended is a basic human right” to be established and become an international brand name based in Sweden and had been set up since 1996 as a company specialized in providing air purifiers and also famous for the high-quality products. It is the combination of the highest CADR with the lowest noise level to offer the device that not only works well but also runs quietly to make the most comfortable feeling for customers while enjoying the fresh and clear air from it.


This company was set up in 1989, and up to now it has been known for the researching and developing environmental solutions, especially the air purifiers. By the suitable sedulity and hard – working period, finally, Coway becomes a leader in their market share, customer satisfaction as well as the fame about their brand name. Nowadays, Coway is well known for its high quality and exclusive niches with the growth of many subsidiaries such as Thailand, Malaysia, so forth and so on.


They uses the name Master Brands HK as the brand name for providing air purifiers whose products are sold widely in Walmart, Lowe’s, and Whirlpool also gets the good impression from customers through their very fine customer services with the customer care center always ready to help whenever they need as well as the FAQ option and product videos about how to deal many popular mistakes or problems.

Whirlpool owns the best technicians to make the highest quality devices to take care for human being health.



image source: Austin

Austin was born to afford the demand of improving health day by day that the doctors and specialists could not adapt for it. By using the true medical HEPA and the Activated Carbon, an Austin air purifier was invented for the very first time. Austin’s Air purifiers are the first choice of almost all physicians and specialists both nationwide and international to take care for the entire family health.

Besides, this kind also has the large device which can perform well in the area of 480,000 square feet. They are proud of the vast product lines for home from the air purifier to the paints.

Envion Therapure


image source: envionproducts

Envion Therapure wins the Award-winning design and cutting-edge technology in providing the air purifiers and it is also famous for the standard of home environment products but has a very affordable price. They understand clearly about the importance of the health to create the best devices for taking care of and avoid the dust, pollens, pollutants, so forth and so on. This brand is also famous for a wide range of models to adapt all the demands of customers. By using the HEPA Type, UV Light, and Photo Catalyst technologies, you can ensure the best protection from their goods.


What are the differences among the entire types of filters?
To create the clean air, the devices use air filters. There are basically three main types of them:

  • HEPA Filters: High-Efficiency Particulate Air (HEPA) filters are able to get rid of up to 99.97% of molecules that even have the sizes of 0.3 microns as well as huger from the air. This point makes HEPA filters suitable for erasing the pollens or the particles which can cause allergies and the dust mite residue, from the air you breathe every day. With the advanced technology, HyperHEPA units, for example, the IQAir HealthPro Compact seems to run even more excellently than the traditional HEPA ones.
  • Carbon Filters: by using this kind of filter, they are able to move out the entire unpleasant odors and toxic chemicals from the indoor air which can insist of cigarette smoke, fireplace fumes, formaldehyde, volatile organic compounds (paint fumes, carpet glues, new building materials, so forth and so on), pet odors, and kitchen odors.
  • Pre-Filters: this kind of filter is a nice invention since it helps to extend the time among the filter cleanings and changes in addition to preserving the air purifier’s functionality as well as efficiency by holding back the large molecules before they touch the main filters in the device.
Things to consider using the air purifier efficiently?
To use effective air purifier, you should be concerned about the following issues:
  1. Product placement in the room: Normally the air purifier will have three air intakes into the machine, two doors on two sides and one door at the bottom. So when setting an air purifier, you should note that other objects placed in 30cm range to ensure no air intakes shielded on the machine. Also, if there is an air conditioner in the room, the best place to put the air purifier is right under the conditioner so that clean air will be dispersed over the room.
  2. Noteworthy periodic cleaning air filter: After a period of use, the membranes of the machine will sell a lot of dust, so regular cleaning is very important to ensure efficient plant operation. There is one note when cleaning the filter of the machine, you should carefully review the instructions for the majority of the membrane of the air purifier is not added to the water, if use the water to wash, the filter may result in damage and no history reproducible.
  3. The use of air purifiers should be used in a closed room to ensure maximum efficiency.
What is ionization Technology?
Air purifiers are not only effective deodorant. Based on the principle elements of the opposite charges will attract each other, the machine uses technology emits negative charge in the air, with charge neutralization symmetry are harmful positive ions in the environment and create effects attract dirt, bacteria, fungi … the negative ions also stick to the toxic elements in the air and positively charged electrostatic membrane in the machine will attract and keep these elements again.

In the closed room, where used equipment such as computers, printers, televisions, neon lights … are devices emit positive ions harmful to the body, air purifiers will provide negative ions and air conditioning.

What are the criteria for selecting a suitable air purifier?
1. The size of the room you decide to place an air purifier. You must balance the area of space and operate power of air purifiers. If your home is too big and you choose an air purifier machine function lower than the demand, it will not meet the needs of your family; and if you choose a machine with power too much for the room area, it would be a waste. So choosing a good air purifier is influenced by many external factors.

2. What are the functions of the room you book an air purifier for? Depending on the function of the room in which you have to select different air purifiers. It depends on the room, bedroom, kitchen, or living room that you have selected the appropriate air purifier for it.

Example: If you want to use the air purifier in the kitchen, you have to use this type of air purifier with advanced membrane for smelling food, since there is quite heavy and junk, if you do not use such machines, it would be impossible to making clean air environment and does not refer smell. Moreover, the handle of too many disparate causes odor filtration system of air purifier quickly worn and rusty, so you should choose a reliable and the most suitable machine. Similarly, for bedrooms and living room have also chosen to fit.

Note for those devices humidifying air purifiers: Air Purifier humidifier has many advantages, especially for skin benefits for always creating moisture for your skin but if you use this machine. Long days will make your home space becomes moldy, bacteria will have a chance to proliferate. They also affect other equipment such as electromagnetic wave devices…

Which air purifier is the best today?
Since there are too many choices for air purifiers, so you should be very careful when choosing air purifiers to avoid spending money on quack. Select the type of air purifiers have the following characteristics:

  • Considering the origin of products: should choose the air purifier products of the prestigious units on the market that purchase.
  • Next is the air purifier uses advanced technology with high treatment efficiency, please do not buy much buy machines only cost more money inept.
  • Take a look at the distribution unit air purifiers are not one reputable? Additionally see after-sales, accompanied by its air purifiers that good?
Which places should I put my air purifier?
Most air purifiers are made to purify a determined space such as rooms, so it is the best choice to put an air purifier in the room that you spend most of your time in. And this place is usually the bedroom as it is the space for resting and recovering the energy after a hard working day.

However, it does not mean that you cannot use it for the other rooms; you still can spend your time in a home office or in a living area with the other members of your family. Also, kid has the sensitive lungs so placing an air purifier in the baby room is very suitable and beneficial to offer the finest air for him/her to breathe healthily.

Final Thoughts

An air purifier makes direct effects on your health as well as of all the members in your family. To keep your home clean and have no dust, odors, and pollens is to choose the best air purifier because it is one of the best ways to maintain the indoor air pollutants at a minimum rate. Besides, an air purifier can help to keep your family not be affected by airborne irritants.