The new crown virus is transmitted through the air, so what is the best way to choose a household air purifier? Can it filter viruses? (with shopping tips)

Many families place air purifiers, hoping to breathe fresh air indoors, but how to choose a suitable air purifier? Why do some households still smell bad after using the air purifier in some households?

Can air purifiers remove allergens?

In fact, there are many different types of allergens, including pollen, animal skin, bacteria, mold, viruses, etc. As long as an air purifier is well designed, has no air leakage, and has a good high-efficiency filter, it can isolate Get rid of allergens.


Are air purifiers necessarily sterilizable?

In fact, an ordinary air purifier cannot sterilize, it can only remove bacteria, viruses or mold. Air purifiers remove bacteria and other things, and then they will continue to grow. There are probably two types of sterilization technology in the market, one is the technology of using electricity to generate ion or plasma, which consumes a lot of power. Another technology on the filter, such as silver ions or lysozyme, can only sterilize bacteria when it comes into contact with bacteria. However, after a period of use, dust will accumulate on the filter, making it difficult to contact the surface, and the bactericidal function will disappear.


Why does the house still smell bad after using the air purifier?

An air purifier is likened to a trash can in the air. You collect all the debris in the air. If you don’t kill the bacteria and mold in it, they will actually grow on the surface. During the growth process, they will grow Some volatile organic gases are produced, and these organic gases are so-called odors. If you don't kill it and continue to run it, the smell will become more and more. The solution is to change the filter screen frequently to keep the filter screen clean, or choose some filter screens coated with a bactericidal coating to kill bacteria and eliminate the problem of odor.


Can Air Purifiers Filter Viruses?

Since viruses are much smaller than bacteria, if you want to effectively filter viruses, you must pay attention to whether they are equipped with relevant filtration technologies. Generally speaking, an air purifier has a built-in photocatalyst or silver ion filter to block viruses in the air; in addition, when purchasing an air purifier, you should also pay attention to whether it is listed in the product description that it can filter Viruses, and provide relevant research and results, there is sufficient evidence to support its performance in filtering viruses.


Teach you how to choose an air purifier


To choose the most suitable air purifier, you should pay attention to the following three key points

1. Air purifier filter filter technology:

  • HEPA filter: High-efficiency air particulate filter, the most common filter technology. By absorbing fine particles in the air, it can block more than 7% of 0.3 micron suspended particles and purify the air
  • Silver ion filter: a very effective antibacterial substance that stops viruses and bacteria from spreading in the air
  • Activated carbon: Absorbs odors and VOCs in the air
  • Negative ions: no filter element is needed, and negative ions are released to capture small particles of dust, and attach to particles as small as 1 micron, causing them to condense and precipitate, killing microorganisms such as bacteria and viruses
  • Photocatalyst: Use ultraviolet light to decompose VOC , bacteria, and viruses. Now there is a new technology that does not require ultraviolet light and can also be effective under visible light in daily life.
  • Electrostatic type: The principle is to achieve the effect of adsorption and dust removal through the positive and negative attraction in static electricity

2. Air purifiers with different filtration technologies mainly purify/block the following four common harmful substances in the air:

  • VOC (Volatile Organic Compound): VOC includes various organic compounds that can volatilize at room temperature, among which "formaldehyde" is the most commonly heard, which is a proven carcinogen. VOCs can also be left behind in household furniture, cosmetics, fragrance products, detergents, or clothes after dry cleaning.
  • Floating objects in the air: dust, skin debris, hair, etc.
  • Pathogenic sources: such as bacteria, viruses, etc., especially active in the peak season of influenza. Bacteria can adhere to suspended particles, float through the air and spread rapidly indoors, causing an impact on the body.
  • Odor: Garbage smell, pet smell, smoke smell, etc.

3. International certification is the guarantee of confidence

When choosing an air purifier, you should pay attention to whether the fuselage provides the CADR ( Clean Air Delivery Rate ) value established by the American Association of Home Appliance Manufacturers ( AHAM ), which is used to measure the air purifier's ability to remove specific indoor pollutants (cigarette smoke, dust and pollen), the higher the CADR value, the better the purification ability. If you can obtain the " AHAM Verifide " label, it means that this air purifier meets certain standards established by AHAM , and its performance is more reliable. PPP air purifiers, including PPP-1100-01 and PPP-400-01 , not only provide CADR values, but also have AHAM Verifide certification, which is enough to reflect their strong filtration capabilities.


Use and maintenance of air purifier FAQ

The price of air purifiers ranges from a few hundred to several thousand yuan. If you want to maintain the purification performance and improve the durability, the following 6 must-know FAQs should be paid attention to before purchasing and using!


Q1. Understand the purification methods and technologies of air purifiers

A. It is best to place it near the door or window of the house / office. Pollutants will enter the room from the entrance and exit and the ventilation position, and the air will be filtered from the source, and the purification effect will be better.


Q2. How long does it take to use the air purifier each time?

A. Theoretically, it can be turned on for a long time to maintain the purification effect. If you want to save electricity or reduce consumption, it is recommended that someone turn it on indoors first, or use it while sleeping to maintain good air quality.


Q3. How long does it take to replace the air purifier filter?

A. If the design is better or the smart air cleaner will remind the user to replace the filter. Activated carbon is recommended to be replaced every 14 months; HEPA filter is recommended to be replaced every 12 months. If there is abnormal vibration or noise during use, it means that the filter is blocked, and you should consider replacing it early.


Q4. Can the filter element and filter screen of the air purifier be cleaned?

A. The general filter element, activated carbon filter and HEPA filter cannot be cleaned, otherwise the filter element and filter will be damaged; the pre-filter can be cleaned every two weeks.


Q5. What should I do if the air purifier has a peculiar smell and the filter screen changes color?

A. When the air purifier smells, it can be the smell of oily smoke or mold, and the filter needs to be replaced. If the HEPA filter is discolored, it may be due to the carbon content or dust absorbed by the pre-filter. If the filter is not blocked, it can still be used.


Q6. Apart from using air purifiers, is there any other way to improve indoor air quality?

A. Maintaining indoor air circulation, keeping the environment dry, cleaning and disinfecting regularly, and reducing indoor smoking can all help improve air quality and prevent the growth of germs, asthma and allergies.

Air purifier recommendation

Airgle's home version of the medical-grade air purifier AG300 effectively isolates viruses as small as PM0.003

Airgle, an American medical equipment brand, launched the AG300 medical-grade air purifier for home use, which can effectively cover a space of about 390 square feet and is suitable for ordinary household use. The AG300 is equipped with an H14 medical-grade cHEPA ultra-high-efficiency filter, which has been certified by a third-party testing agency to filter 99.999% of particles as small as 0.003 microns, including ultra-tiny bacteria, viruses (new coronavirus) and other air pollutants. "Photocatalyst + UVC" components can decompose formaldehyde, volatile gases and odors, etc. There are also Wi-Fi connection and mobile app (APP) control functions, combined with the use of air quality monitoring sensors, it is easy to control the air quality level in the room in real time.


The benefits of air purifiers don’t need to be said any more. Air pollutants, whether germs or formaldehyde, will actually pose a lot of threats to health, especially in Hong Kong, where air pollution is serious. The air purifying function of air purifiers , At least it can bring fresh air to everyone's home. So the air freshener side had to? You may wish to refer to the above 3 points before choosing the most cost-effective air purifier for yourself.