This content comes from @What's worth buyingAPP, and the views only represent the author's own |Author: Dr Flying on the ground
Since moving to a new house, having children, and facing a body that is still adapting to the environment and thriving, our family's emphasis on "environmental safety" has undergone a qualitative change in mentality and action.
Especially in recent years, the global air quality has declined, the virus is raging, and some new toys and new ornaments have been added to the home from time to time, and various solid/gaseous pollutants are always around.
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Let's go to the conclusion first, [Close your eyes and buy series]:
(1) [3000-4000 yuan, the first airx A10], high CARD, high CCM, high aldehyde/benzene/toluene/xylene/TVOC/ammonia rate, high sterilization rate, high purification efficiency of double-sided filter.
[Within 3000 yuan, you can also choose airx A8P]
(2) [4000-6000 yuan] large area selection of Akachi Z01
看重净化效率选IAM M8
(3) [6000-8000 yuan] Shule's A10 with double in and double out of the air duct, which is efficient in removing formaldehyde and removing taste
(4) [More than 8000 yuan] IAM X8 suitable for rapid aldehyde removal and living in a new home/villa
1. What is the standard for indoor air quality?
According to the new version of indoor air quality (GB/T 18883-2022) "Indoor Air Quality Standard", the standard contains four major parameter categories and 19 parameters: physical, chemical, biological and radioactive, and the standard values of each parameter can be seen in the following table:
(1) Physical parameters are related to seasonality, and the human body is easy to perceive, except for extreme weather that needs to use humidifiers or dehumidifiers for humidity adjustment, daily use of air conditioners in every home can be adjusted at any time for temperature/humidity/air volume.
(2) In terms of chemical and biological properties, it is not easy for the human body to perceive, so it needs to be purified by air purifiers. It can be summarized into four categories: one is particulate matter PM10 and PM2.5, the smaller the particulate matter enters the human body, the deeper the harm, the greater the harm to the human body. One is formaldehyde, benzene/toluene/xylene with special fragrance, ammonia with foul odor, TVOC with special odor and other gaseous pollutants. Gaseous pollutants are released over a period of 5-15 years and require continuous, rather than short-term, removal. One is viruses, bacteria and other microorganisms, especially influenza H1N1, Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, etc. There is also a type of pet at home, especially those with cats or dogs, where animal allergens, animal hair, saliva mixed with dust and germs are stuck together.
(3) The concentration of radioactive radon and radon progeny is generally higher indoors than outdoors, mainly due to the presence of trace amounts of radioactive elements in building materials and building foundations. It is necessary to open doors and windows frequently to ventilate the room, which is an effective measure to significantly reduce the concentration of radioactivity in the room.
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2. Why are most air purifiers effective against PM2.5, bacteria, and pet hair, but only a few professional purifiers are effective in removing gaseous pollutants such as formaldehyde?
Although solid pollutants, gaseous pollutants, bacteria, and pet hair are the core objects of air purification, most domestic air purifiers are effective against PM2.5, bacteria, pet hair, etc. This is because the core technology of the air purifier is physical filtration, which simply means that the indoor air is "pumped" into the machine by the fan in the purifier, and the pollutants are isolated through the filter screen in the machine. The filter screen has a certain pore size, and depending on the size of the pore, it can isolate particles of different diameters. A standard HEPA filter can absorb 99.7% of suspended particles with a size of 0.3 microns, so it can completely filter PM2.5 less than 2.5 microns in diameter, bacteria as small as 1 micron, and hair as small as 40 microns.
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Gaseous pollutants are much smaller in diameter than particulate pollutants and cannot be isolated by filters. In this case, activated carbon needs to be used for formaldehyde adsorption, but the water vapor in the air can also replace formaldehyde from the activated carbon, which is why it is not possible to remove formaldehyde only by activated carbon, and some acidic or alkaline catalyst must be used at the same time to immediately decompose the formaldehyde captured by activated carbon and decompose it into harmless gases such as water H2O and carbon dioxide CO2.
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This process involves complex chemical reactions, and the technical content of an air purifier to remove formaldehyde is much higher, which is much more difficult than the technology of a HEPA filter, which is why there are very few reliable products on the market that can really remove formaldehyde.
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Usually the purification technology used in formaldehyde removal air purifier is adsorption and decomposition, in addition, there are room temperature thermal catalysis and ion technology, but room temperature thermal catalysis is basically ineffective for macromolecules at room temperature, so it is only useful for small molecule gaseous pollutants, and catalyst poisoning will occur in actual use, so the life is still limited. In addition, if someone in the home has a pacemaker installed, then it is strictly forbidden to use any air purifier with ionic function.
3. Interpretation of air purifier indicators
Looking directly at the mind map, the key indicators of the air purifier are clear at a glance, and the common indicators include CADR value, CCM value, purification energy efficiency, filter material, formaldehyde adsorption and decomposition technology, and value-added functions 6 aspects. In recent years, with the continuous improvement of the market access threshold for air purifiers, the homogenization between brands has become more and more serious.
1. The most significant difference
It is the cost of purchasing the machine and the price of replacing the filter, the cost = the price of the whole machine + the price of the filter û the number of replacements.
Generally, the filter can be divided into primary filter, medium filter, and high-efficiency filter.
(1) Primary filter: filter visible pollutants, washable, no need to replace, the cost is 0.
(2) Medium-efficiency filter: filter outdoor pollen and other ultra-fine particulate matter larger than 10 microns, if the filter is normally turned on for 8-12 hours a day, it can generally be used for 6-12 months, if it is 24 hours uninterrupted, the filter generally needs to be replaced in four months, of course, it also depends on the actual use of the filter, and the cost is generally 100-300.
(3) High-efficiency filter: HEPA standard filtration for formaldehyde, TVOC and other gaseous pollutants and ultra-fine particles greater than 0.3 microns, replaced once every 4-12 months, with a cost of 200-500 yuan.
The filter can be divided into layered or composite, for example, the activated carbon of airx A10 has 8 layers, and the activated carbon and HEPA are combined into a composite filter. For the combined filter, the price of the whole set will be cheaper than buying it alone, and you can give preference to the whole set.
2. Secondly, the biggest difference in function
It is mainly manifested in five aspects, (1) is the CADR value related to the usable area, (2) is the type of filter screen and the number of filters, (3) judges whether it really has the ability to remove formaldehyde, and (4) is the value-added functions such as screen display value and smart APP.
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(5) Whether it is double-sided purification, it is important to mention here that some professional purifier brands such as airx, IAM, and Honeywell will use double-sided air inlet purification, compared with traditional single-filter single-inlet air purification, the double-sided purification efficiency is increased by 2 times, and the purification effect is better.
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4. What brand and model of products to choose?
There are really too many air purifiers on the market, and both traditional and emerging home appliance brands have this product. There are all kinds of products, uneven, and choosing a cost-effective and quality-assured product is like looking for a needle in a haystack.
It is difficult to consider that the basic entry-level air purifier below 2,000 yuan has a more comprehensive purification capacity, so only products above 2,000 yuan are considered. Through comparison, the hot-selling air purifier products in different price ranges are finally sorted out:
(1) 2000-4000 yuan, the air purifier in this price range has only begun to have a strong ability to remove aldehydes, hot-selling products: airx A10, Mijia 4Max, Philips AC3737, IAM KJ500F, Honeywell KJ820F-P21D, 352 X63C.
(2) 4000-6000 yuan, hot-selling products: IAM M8, Shule's A02, 352 X86C, Akachi Z01
(3) 6000-8000 yuan, hot-selling products: Dyson PH04, Shule's A10, A.O. Smith KJ455F-C15-F+
(4)8000元以上,艾泊斯AI-700、IAM X8、IQAir HP250
Fifth, the same price range, popular models comparison
By comparing the parameters of different models in the same price segment, you can consider factors such as your budget, family size, etc.
Let's first take a look at the difference in the cost of replacing the filter element: the average cost of replacing the filter element is only 0.34 yuan per day for the 16 hot-selling models, and the IQAir replacement filter element is the highest, but it is not more than 1 yuan per day.
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Compare the core functions (click to see the high-definition picture, you can also save it):
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Let's make a horizontal comparison with the five main differences mentioned in Chapter 3:
1、【2000-4000元】首推airx A10
(1) Comparison of differences
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(1) CADR value related to usable area: Mijia 4Max> Honeywell KJ820F-P21D> airx A10> 352 X63C> Philips AC3737.
(2) The type of filter screen and the number of filter screens: airx A10 has 8 layers of columnar activated carbon> Mijia 4Max porous impregnated activated carbon > other products.
(3) Judge whether it really has the ability to remove formaldehyde: all have
(4) It is a value-added function such as screen display value and smart APP: airx A10 is the only one with formaldehyde/PM2.5/TVOC triple display, Mijia 4Max and 352 X63C are formaldehyde/PM2.5 dual display, and the rest of the products only PM2.5 digital single display.
(5) Double-sided double-sided filter: airx A10, IAM KJ500F, Honeywell KJ820F-P21D have double-sided filter, which has higher purification efficiency.
(2) Purchase suggestions
Combining several factors, the first airx A10 this, within 4000 yuan represents the hot-selling model, the price, the index is very balanced, the cost performance is particularly high, only spend half of the budget to have a high-end machine, high CARD, high CCM, high aldehyde / benzene / toluene / xylene / TVOC / ammonia rate, high sterilization rate, high purification efficiency of double-sided filter. Unlike other brands that derive various product lines, AirX is a technology brand that specializes in making air purifiers to solve the problem of indoor air pollution and provide comprehensive solutions for healthy air.
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The product has a set of filters on the left and right sides of the machine, each set is composed of two filters, one is the primary filter, which can be washed directly and does not need to be replaced. The other is an 8-layer columnar activated carbon mesh and a HEPA filter screen combined with a filter, a set of costs 499 yuan, the whole machine has 1200g of carbon, the life of the filter can be as long as 12 months, and the average daily cost is only 2 cents.
In addition to formaldehyde and other gaseous pollutants, A10 can remove aldehyde, benzene, toluene, xylene, TVOC, ammonia 6 kinds of gaseous pollutants, especially formaldehyde can be reduced to 0.002mg/m3, the purification effect is 40 times better than the country.
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If you only consider the machine within 3000 yuan, you can also choose their A8P, as long as 2799 yuan, except for the difference in the display screen only pm2.5 value, and the gaseous pollutants are mainly strong formaldehyde, the rest of the differences are not obvious.
2、【4000-6000元】大面积选阿卡驰Z01,看重净化效率选IAM M8
(1) Comparison of differences
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(1) CADR values related to the usable area: Akachi Z01> Schulox A02> IAM M8> 352 X86C> A.O. Smith KJ455F-C15-F+.
(2) The type of filter and the number of filter screens: 352 X86C uses 5 layers of activated carbon.
(3) Judge whether it really has the ability to remove formaldehyde: all have.
(4) It is a value-added function such as screen display value and smart APP: 352 X86C formaldehyde/PM2.5/TVOC triple display, IAM M8 formaldehyde/PM2.5 dual display.
(5)双侧双面滤网:IAM M8。
(2) Purchase suggestions
From the point of view of applicable area, among the 4000-6000 yuan models, Akachi Z01 is very cost-effective, and the CADR value is on par with the price of 6699 yuan Schulox A10.
IAM M8 is an old household appliance brand from the purification efficiency, and its products involve cooked water machines, air purifiers, humidifiers, instant hot water dispensers, water purifiers, hair removal instruments and other products. There are many models of IAM home air purifiers: A1, M6, M7, M8, X8, etc. Among them, the strong aldehyde removal mainly depends on the M8 model, double-sided double-sided filter, 3-year long-term carbon magic formaldehyde removal, very classic, is one of the classic models at the price of 5000 yuan.
The price of M7 and M8 is similar, but the indicators and materials of M8 are twice that of M7, which I found after dismantling M7 and M8 actual machines, so it is recommended that you consider M8 instead of M7.
3. [6000-8000 yuan] Shule's A10 with double in and double out of air duct, efficient formaldehyde removal and odor removal
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The main competitors in this price segment are Dyson and Shule, compared to Dyson, which has a multi-functional combination such as humidification and hair dryer, Shulox focuses on purification.
As one of the three major appliance brands in the United States, Schulox was founded in California in 1997 and entered the Chinese market in 2019. Focus on air conditioning products such as compressors, split air conditioners, and portable equipment. There are two main models: A02 and A10. Among them, the price of A02 is more than 4,000 yuan, and A10 is more than 6,000 yuan. Although they are all powerful aldehyde removal air purifiers, the A10 index is even higher.
This is also why many machines below 6000 yuan love to benchmark with A10, this is definitely a classic model in the 6000-8000 yuan price range.
The core advantages include: in terms of decomposing formaldehyde, TCF hunting aldehyde factor decomposes formaldehyde, decomposes formaldehyde into non-toxic carbon dioxide and water, and the formaldehyde purification rate reaches 99%. In terms of air purification, the CARD value is as high as 1000 M3/h in solids and 600 M3/h in gaseous state. The active type purifies the air by releasing tens of millions of negative ions, and the passive type contains five layers of filters. In terms of filters, five-stage filtration includes primary filters, high-efficiency HEPA screens, aldehyde hunting factor nets, amethyst aldehyde removal nets, and photocatalyst nets for layer by layer purification. In terms of fans, the dual fans and double flow channels work at the same time, with double inlet and double outlet, increasing the air inlet and outlet area and improving the purification efficiency.
4. [More than 8000 yuan] Aipos AI-700, which is suitable for quickly removing aldehydes and living in a new home, and IAM X8 which is suitable for villas
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Alpos is a domestic high-end air purifier brand, focusing on high-end air purifiers, with strong aldehyde removal and sterilization capabilities. They also have products in the field of air cleaning such as fresh air. The main models are: AI-300, AI-600, and AI-700 air purifiers. Priority is given to AI-700, although the price is about 3000 yuan more expensive than AI-600, but the incremental performance index is increased by 80%.
Its core advantage is that it can quickly remove aldehydes and live in a new home, the activated carbon filter cartridge weighs 8.5 kg, and is composed of H11 primary filter screen + dustproof filter screen + TVOC high-efficiency filter cartridge, and the service life of TVOC high-efficiency filter cartridge can reach 18 months. The gaseous value of CCM reached 16000mg, which exceeded the national standard by 10.6 times.
However, IAM X8 has the advantages of Aipos, and X8 has stronger purification ability, so it is recommended to go directly to IAM X8 and do it in one step.
IAM X8 is a high-end machine like Alpos AI-700, and there is no problem with aldehyde removal and sterilization, but the price is expensive. The solid value of CADR reaches 1500 m3/h, and the gaseous state reaches 1000 m3/h, which is suitable for large villas + the highest value of CADR. The electrochemical formaldehyde sensor is used to accurately calculate the formaldehyde value generated in the electrochemical reaction. Five-layer filter screen, including primary filter, long-term HEPA screen, modified activated carbon screen, ultraviolet photocatalysis, and negative ion purification. Support ultraviolet lamp sterilization, photocatalyst, 29.3 million negative ions decomposition of formaldehyde.
Sixth, the strategy summary
After comparing the best-selling air purifiers on the market, in general, compared with the brands with multiple product lines, brands specializing in air purifiers such as airx, IAM, Akachi, Shulax, and Alpos are more professional and comprehensive in air purification.
But you must match the product according to your own needs, if you don't want to spend too much effort researching, the easiest way is to buy directly by price, combined with the conclusion of this article.