Do you need an air purifier in the summer? Life is telling you!
As soon as summer arrives, Air conditioning is used frequently, But shut the air purifier! Is the air purifier Is it really a seasonal home appliance? Do you not need to use an air purifier in summer? Maybe a lot of people will think, The outdoor smog is serious in autumn and winter. The air quality in the room should also be poor, but once in the summer, The outdoor smog is gone, Is it more necessary to use an air purifier in the room? The answer is yes.
Hear what the experts say Ms. Wang Ping, a professor of respiratory diseases at the 306 Hospital of the People’s Liberation Army, told reporters that indoor air pollution will increase 40% of ischemic heart disease, 40% of strokes, 11% of chronic lung diseases and 6% of lung cancer. Although the air is invisible and undetectable, air pollution has seriously affected human health.
Closed indoor pollution in summer The Health Education Association has also issued a report stating that summer is a season of high-sensitivity during the year, and indoor air pollution is four to five times higher than outdoor. Summer is the peak period of using air conditioners. While enjoying the cool breeze in a closed air-conditioned room, it ignores the pollution of indoor air and has seriously jeopardized our physical and mental health.
Summer temperature rises, formaldehyde release accelerates In summer, the air purifier first needs to go to formaldehyde to have a good effect. In summer, the temperature rises, formaldehyde enters the active period of volatilization, and the concentration of formaldehyde in the new house increases, and the phenomenon of excessive formaldehyde appears. Every room temperature rises at home
Indoor air conditioning pollution The indoor air is not circulating, and the accumulation of pollutants is increased. In summer, the temperature is high. People turn on the air conditioner to cool down and close the doors and windows. The indoor air is dull, the temperature is high and humid, and the release rate of pollutants will be accelerated. If the doors and windows are closed for a long time, the pollutants will be closed. It cannot be effectively volatilized. Over time, family members may experience dizziness, nausea, coughing, and even difficulty breathing. Second, the humid and high-temperature environment also increases the chance of biological contamination. A domestic survey shows that 21% of indoor air quality problems are caused by microbial contamination, mainly including bacteria, fungi, pollen, viruses, etc., which may cause respiratory diseases such as allergies and asthma. Again, all types of home appliances and daily activities have increased indoor PM2.5 pollution. The Beijing Municipal Center for Disease Control and Prevention has shown that smoking in the room can increase the PM2.5 value by 12 times. If there are other human activities such as cooking, the concentration of PM2.5 will increase greatly.
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The haze is coming again, closing the doors and windows, pretending that the thick smog can’t come in (be strange), as well as the harmful pollution released by interior decoration materials, artificial panels, composite furniture, and the second-hand smoke that floats… These are the pains that can breathe!
“Save the Breath” is a matter of people’s livelihood. Not long ago, Blueair and the Nutshell Network held a DIY Air Purifier Competition. The vast shells were also open-minded and submitted a variety of “empty net solutions”. Let’s take a look at their concept sketches~
[Secondary soul painting] by the stinky gardener
The mobile purifier, based on Hayao Miyazaki’s “Hal’s Moving Castle”, can also fly. Metal detector, 24K infrared laser eye, largemouth strong inhalation, top pipe output, let the bacteria all dogs.
[Please accept your knees] by the peninsula
Installed on the roof, it does not occupy space and is beautiful and elegant, that is, the filter replacement is not convenient. Based on the UFO flying saucer, it has six sides and needs a remote control.
[Future Black Technology] by geeks who love the above art
Stepping on a spinning bike provides a source of power for the machine, both fitness and environmentally friendly. According to the principle of the electrostatic copier, the smog particles are mixed into the ink, and the input text can be printed.
However, only “Alans” successfully entered the three yuan
Acrylic shell + HEPA filter + activated carbon net + fan + power module, from prototype design to DIY production, netizen “-Biu took a big-” took 3 days. She gave this boxy machine a lovely name: Alans. Dubai VS Olansi
So, what is the strength of the new DIY air purifier “Olans”? The shell net came in. Blueair’s most representative Pro L air purifier, in an enclosed glass room with a site of about 15 square meters, held an informal friendly match between the two sides.
Task 1 Spread the board with formaldehyde and then minimize the concentration of formaldehyde in the air within 30 minutes. ▼
Task 2 Simulate the normal indoor environment and then minimize the PM2.5 concentration in the air as much as possible within 30 minutes. ▼
It can be seen from the results of the competition that “Auslanes” has been listed by professional player Blueair “Dubai” in both the formaldehyde project and the PM2.5 project.
Where is the DIY air purifier lost? Is there a problem with the production materials? Or is there a design omission? With these questions, we conducted a comprehensive analysis.
Material selection and process: the foundation laid from the body
▲Production of the acrylic sheet used by Allan
The outer shell of the Australian is acrylic, it has good transparency and plasticity, and most importantly it is cheap. First, cut with a laser, then use a glue gun to bond and seal, the final physical shape looks quite similar…
However, it is just like a model. Industrial grade air purifiers have many features in the selection of materials, processes and product design. Blueair uses solid alloy steel that does not produce harmful substances or cracks like industrial plastics but also has sound and noise resistance.
Blueair’s chief designer, Mr. Magnus, shared his design philosophy: “For Blueair, quality is as important as beauty. Every part is carefully selected and durable. We chose not to use plastic. Rugged galvanized steel, and it doesn’t contain a lot of harmful substances like plastic, you only need to replace the filter to ensure that the product has been used for many years.”
Wind tunnel design: open up the lung capacity, and “do not fight”
▲The fan used in making Alans
The right and top of the Olans enclosure are air inlets and outlets, but after confirmation by Blueair engineers, the air ducts were designed to be oversized and violated safety regulations. The sound control of Olans is also not good. The average noise of 1 minute is 58 decibels, which is close to the loud talk.
The Blueair Pro L uses a right-in and left-out air duct design. In order to expand the contact area with the air, the internal filter screen is also designed as a V-shaped, two filters can be placed at the same time, and there are two correspondingly. The ultra-quiet fans run synchronously and the low-speed running noise is only 29 decibels. A reasonable air duct design not only helps to capture more dirty air but also sends out more clean air, which also helps to reduce “wind noise”.
Filtering: Don’t let the “filter” fight alone
▲Production of the universal filter used by Alans
Olansi uses the common activated carbon particle filter and HEPA filter on the market, but we can clearly see in the PM2.5 test: when the particle content drops to about 60, no matter how many cycles of filtration, the value Can not fall down; and formaldehyde, only purified about 27%.
So is it better to change the denser filter? If the filter is made thick and dense, although the capture rate can be increased, the wind resistance is also increased, eventually, the air volume is insufficient, and the energy consumption and noise are also increased.
How is Blueair solved? Blueair uses an ultra-quiet patented technology, HEPASilent®, which combines electrostatic and mechanical filtration to deliver more clean air with minimal energy consumption and noise. All products are certified to “zero ozone” by ARB testing. Without any harmful emissions.
For gaseous pollutants such as formaldehyde, Blueair has developed a new activated carbon filter: the honeycomb structure is removed, the wind resistance is smaller, and the contact surface is more sufficient; the alumina carrier with better activity is used, the microporous structure is more developed; the cold catalyst content is increased by 3 times. Capturing formaldehyde is more powerful. After a new upgrade, the Blueair filter has reached the highest national CCM level and can capture more air pollutants at the same time.
CADR: Race against time
An important indicator for choosing an air purifier is CADR, which is simply the volume of air purified per unit of time. Indoor air is flowing dynamically. Ingress, cleaning, ventilation, and walking will increase the number of impurities in the air. If the CADR is not high enough, the purification speed will not keep up with the continuous generation of pollution.
In fact, through the test results, we can see that the CADR of Aol’s is much lower than that of Blueair, but how strong is the CDAR value of the Blueair Pro L up to 700m3/h?
In a 45-square-meter meeting room, the shell network tested the performance of the Blueair Pro L: after 90 minutes, the concentration of PM2.5 in this room dropped from 128μg/m3 to below 5.84μg/m3… And this is not the limit, the Blueair Pro L can be used for up to 84 square meters of space.
Detection: not let go of every corner
The actual use of the air purifier is very important. We open the air purifier every day. Is the indoor air really getting better?
In order to detect the actual effect of the air purifier, it is not enough to measure the data of the tuyere. The air purifier will first purify the nearby air, but the indoor air is always flowing, and people will walk around every corner of the room, so the correct method should be to measure every corner of the room. When the entire room was cleaned, the air purifier really worked.
Professional instruments are also indispensable during the testing process. In order to solve the problem of expensive instruments, Blueair provides users with free on-site air detection services. Experienced inspectors will never let go of any corners. Finally, detailed inspection reports will be issued, and the actual use of the products will be clear at a glance.
Technology: Serving a better life
The technology stems from a curiosity about the unknown, and the exploration of the limits, Blueair engineers prefer to use technology to make life better. By comparing with the DIY air purifier, we found that in order to truly master the technology and produce excellent products, professional knowledge and dedication are indispensable.
The Smart Age has been launched, and Blueair has also launched the smart app Blueair Friend and the smart detection product Blueair Aware and recently launched the live view Air View by Blueair. Air View, like Google Earth, contains 360° real-life photos of major cities around the world. The data is updated daily in real-time, and China is also planning to include it in the future.
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Analysis of the trend of future indoor air purifier design
In recent years, with the improvement of living standards and the intensification of air pollution problems, people are paying more and more attention to the quality of indoor air. Therefore, indoor air purifiers have also received more extensive attention, and many high-quality air purifier products have appeared on the market. For enterprises, it is very important to accurately grasp the preferences of the user population, which is more reflected in the design of indoor air purifiers. Then, the main trend of indoor air purifier design is mainly reflected in which aspect.
From the design point of view, the simple home style is the main trend of indoor air purifier design. As people’s requirements for home environment decoration continue to increase, more factors will be taken into account when purchasing products. For them, the indoor air purifier is not only a functional product but also an accessory that matches the overall home style. With this in mind, the indoor air purifier will be more concerned with the home-style factor in the design and designed according to the user’s aesthetic preferences to meet the user’s personalized aesthetic needs.
From the perspective of functional experience, the convergence trend of various functions is becoming more and more obvious, and the product experience of indoor air purifier design will be more interesting and interesting. The integration of multiple functions is an effective way to innovate product designs. For example, the integration of air purifiers and air humidifiers, the fusion of air purifiers and aromatherapy, etc., through the integration of functions and innovations to give products more fresh vitality, not only can increase the added value of the products and market competition, but also for users. Bring a more practical and rich feature experience. Multi-function air purifiers will appear more in our lives.
Green design has gradually become a trend in the design of indoor air purifiers. Fundamentally, air purifiers can’t solve the problem of air pollution, but the green design can minimize the adverse impact on the environment. For example, this plant air purifier design, built-in high-adsorption and high-decomposition plants, through real-time monitoring of indoor temperature, humidity and air purification index through intelligent maintenance technology, to create an ecological environment that meets plant growth, supplemented by a number of high-tech purification Technology, to achieve the effect of plant ecological purification, to bring people a green and healthy breathing enjoyment, the concept of ecological purification highlights environmental health.
Intelligentization is also the development trend of indoor air purifier design. Advances in smart technology offer greater possibilities for product design innovation. Through intelligent technology, the product is controlled by the intelligent control system, and the integrated intelligent function can be used to intelligently distribute the corresponding purification function according to the pollution degree of the indoor air pollution, the type of pollution, and the pollution original, and the targeted and industrial purification treatment. To make air purification more intelligent and efficient. Smart air purifiers will also be integrated with smart home systems to achieve interconnection, and such products are highly anticipated.
As a professional industrial design company, it can accurately grasp the trend of indoor air purifier design, and according to the unique needs of customers, through design innovation from functions, shapes, materials, processes, man-machines, etc., design to meet customer requirements. Products, and can provide users with good product experience, to meet the user’s personalized use needs and emotional needs.
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Whether the air purifier removes formaldehyde is a rumor! It used to be wrong…
After the renovation of the new house, people usually keep the new home well ventilated for a period of time to remove formaldehyde, dust, odor and other decoration pollution. Air wares are used by owners who want to stay in a new home quickly. However, formaldehyde is one of the most stubborn gas pollutions in the room. How long does it take to use air purifiers to remove formaldehyde hazards?
I consulted the relevant indoor environmental management technicians. They pointed out that the newly renovated new house uses an air purifier, and it may not be ideal to clear the check-in in a short period of time. Because if a large number of decoration materials containing formaldehyde are used in the decoration of the house, indoor formaldehyde pollution may be very serious, especially in summer, the higher the temperature, the more important the pollution.
Secondly, these articles containing formaldehyde components release formaldehyde in the form of gas for about 3-15, which is difficult to remove at one time regardless of the method. The purpose of using a formaldehyde-free air purifier is to always control the indoor air formaldehyde concentration within a safe range. The domestic “indoor air quality standard” stipulates that after closing the door and window for one hour, the indoor formaldehyde safety range value is ≤0.08 mg/cubic. However, according to children’s response to formaldehyde, it should be less than 0.06 mg/cubic.
An air purifier in its applicable purification area, the window can be closed and the indoor air can be purified 5 times within 1 hour, which means that the air purifier should be able to control the indoor formaldehyde concentration within 12 minutes. At ≤0.08 mg/cubic.
Therefore, consumers should consult with each other when selecting an air purifier.
In addition, formaldehyde has a system and long-term volatile characteristics, it is recommended to open the air purifier 24 hours.
Air purifiers have long-term opening related questions:
1. Will the air purifier burn out the fan if it is turned on for a long time?
If you are staying in a new home and your family is indoors, it is recommended to open it for a long time to prevent the indoor formaldehyde concentration from exceeding the standard. Most of the air purifiers are protected by a fan, and they will not burn out when they are normally open.
If the family is not indoors, you can keep the room as good as possible, so that the air naturally dilutes indoor formaldehyde pollution.
2. How long does the air purifier change the filter element for a long time?
The current air purifiers are very smart, with a filter reminder function, just replace it according to the reminder.
The naked eye judges the air purifier filter replacement time is to distinguish the color of the filter, from white to black, this process takes about half a year, about a year. However, it cannot be generalized that each brand’s air purifier design is different. In order to extend the service life of the machine and filter element, it is recommended to clean the machine and filter element once for 3 months.
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The air purifier has the basic concepts of permanent removal of particulate matter and air-borne chemicals. Obviously, they clean the air in the room and provide clean and healthy air. It also provides ways to reduce disease and allergic symptoms. Although air purifiers deal with a lot of air quality problems. They are usually used to solve problems found in many families. At the same time, they can be used in living rooms and bedrooms, offices, kitchens or any area where air quality problems can be felt.
How long should you run it for maximum effect?
The air purifier is specially designed for long-term use. However, there is always a common misconception that air purifiers operating indoors for 1 to 2 hours will clean the air adequately. We can see that new particles surround the air all the time. Open windows, air conditioning, heating systems, humans and pets are responsible for bringing pollutants into the room.
Now, can you ask me how long it takes to move the air purifier? The answer depends on the manufacturer, model, and type. However, in general, it is recommended to turn on the power supply for 5 to 8 hours at a time, bearing in mind that the air purifier can be turned on at any time after rest. So are you going to buy an air purifier?
It is always a good thing to buy unique air purifiers to alleviate specific air quality problems. The main reasons for purchasing air purifiers are:
* They can be used to deal with house upgrade dust and odor.
According to local education authorities, Beijing plans to install air purifiers as part of school building standards to cope with frequent smog weather in the capital.
The Beijing Times said Tuesday that government departments, including the Beijing Municipal Bureau of Education (BMCE), are drafting standards for school construction in the city, including the installation of air purifiers.
In response to severe smog forecasts, Beijing issued two red pollution warnings this winter.
Xi’an said the effectiveness of air purifiers in compact classrooms had not been determined, adding that schools could install air purifiers on their own.
“Installation of water purifiers in classrooms is to ensure the safety of students and requires parental approval,” Xi’an said.
Parents shrouded in Beijing’s dangerous smog have repeatedly called on primary and secondary schools to install air purifiers in their classrooms, but schools refuse to accept the approval of the education authorities. Their children’s school, but their efforts were rejected.
Well-funded kindergartens and elementary schools have installed air purifiers in their classrooms, but some schools are unable to buy them because of insufficient budgets.
Hao Xianjun, chairman of Shijingshan School, opened the air purification system during the Pollution Day battle against the Beijing Times. The concentration of PM2.5 (floating particles less than 2.5 microns in diameter) announced that it would be reduced to less than micrograms. When a new teaching building is built every cubic meter this year, Shijingshan Experimental Junior High School will take the lead in installing such a system.
During the fourth session of the 12th People’s Political Advisory Committee of Beijing, many consultants submitted a proposal for schools to deal with smog.
Pu Zhe, a member of the committee, said that the education department would set up a special smoke fund, set up an air purification system in schools, set up what types of air purifiers and start a comprehensive procurement platform. He said local regulations should be introduced.
Beijing-based Mirror told committee members Thursday that at its meeting on Thursday, primary and secondary schools are expected to extend winter holidays and reduce summer holidays as smog covers the capital in winter. Beijing primary and secondary schools for about a month.
Which schools in Beijing are studying air pollution?
The most serious level of air pollution recorded so far in Beijing has led to a rapid increase in sales, concerns about healthy air purifiers, and in many international schools around Beijing, procedures have been reassessed when AQI is soaring. Beijing International School 7 is to answer your pollution protection measures and students’health problems.
Air pollution measures are common causes, but when the ceiling has been established and any outdoor activities are canceled, the ceiling depends on the school. Staff will have to keep an eye on the US Embassy and the Chinese government. Schools have not yet set a ceiling on indoor activities to publish air quality measurements and monitor indoor air quality in most households.
Harrow is the principal nurse of Beijing International School, NICI Newbold, who monitors AQI and provides guidance for school pollution control measures. Like many other schools in Beijing, schools will use the 275 AQI deadline to cancel all outdoor activities. “275 is a random number, but [schools] are trying to find a balance between students who are against aggressive pollution risks,” said Newbold. In the case of Saturday sports, rake, according to the criteria already stipulated by the International School Track and Field Championship (ISAC). If 251 events that had been in AQI for more than three hours or had become events, the event would have been canceled. The event will be canceled when the air quality index reaches 276 at the beginning of the competition.
Newbold said that when asked if “sudden fantasy” caused higher respiratory problems, “the school showed a higher incidence of certain, this week, many students and staff from upper respiratory tract infections he answered.” At the beginning of the school year, student Haro’s air quality, and open a meeting about what this level means to you, and what to do.
Many international schools invest in personal classroom air purifiers. At Beijing International Montessori School (MSB), the air filter in the classroom is always on and has been replaced regularly. In addition, MSB strictly abides by the pollution control policy. Bevenhoffman said MSB systems and library management were “dangerous” levels for which “safety” levels were likely to change very quickly, and the school explained, “Check pollution levels.” When the US Embassy reported more than 200 AQI, all students had to stay in the building. If all outdoor activities stop, students start knitting for activities such as reading libraries.
Beijing Canadian International School (CISB) is also suitable for all classes.
In other schools, whether it is air quality, to ensure that students can participate in physical exercise, which requires a lot of money. Regardless of Dewey Beijing, Beijing International School (ISB) is that you have made a dome, especially for sports. The dome is pressurized and has a built-in filtering system. ISB recently completed the construction of two domes. The material was shipped from the United States.
Dewey’s dome was completed in September 2011, and in the summer of 2012, we built an air purification unit in our school. In AQI, measurements within the dome usually range from 0 to 5. According to Dewey, they worked with ISB and Beijing Jingxi School (WAB) to sample air quality on campus and were asked to participate in a research project, which was compared with official government statistics. To this end, Dewey plans to install scanners in its Lenovo Garden Park.
Air purifiers and health sciences: do you have data?
The hottest gift you’ve ever given is “They can really provide the rampant indoor air purifiers in China since last year. Sales have soared. Maybe it’s the moon cakes and red envelopes. When’s the Chinese New Year?” According to records, independent testing, including mines, a large number of good air purifiers can significantly improve your indoor PM2.58% and sell inventory after highly publicized air crisis trio. I think this is a good chance. But is there really any good data to prove that you are healthy? Of course, it seems logical to reduce exposure to pollution and harmful health effects. However, the medical history was later filled with common sense and traditional stories, such as venotomy, or more modern multivitamin traditions. A large proportion of people read this article, assuming that it is “healthy, multivitamin daily – seemingly useless or harmful, but the best evidence suggests that they are worthless and possibly worthless.” Harm.
In theory, in the test, good clean water should increase the indoor pollution level by more than 80%. The percentage used by private associations of consumer electronics manufacturers (AHAM) in their Clean Air Transport Rate (CADR) tests has decreased by 80% and is widely cited in comparison charts of air purifiers. Well, let’s say you feel very safe and comfortable and have a top-level cleaner installed in your living room. But how much time does the filter actually have? How about – maybe only 20 minutes of laboratory testing, cleaning is too small for room size, or filters are old, or fans are too slow, or Windows is usually cited as CADR testing open in the real world? I hope this conversation goes a step further, asking for evidence that your health will improve when you use these machines. I hope to be able to convey to my patients and readers the published studies that followed a large number of people, but even months or years later, they conducted air purification studies and measured their health in comparison to the control group that did not use the machine to determine heart and lung diseases, cancer and mortality. Are there any improvements? Are you?
I searched PubMed’s scientific database to find the best research, and I wasn’t surprised, because I was disappointed, but I found very little data. These well-designed research projects are very difficult and expensive. However, there are some attempts, especially research search, but the results are very small, and there are great differences between these studies, making it difficult for A to assess children with asthma when used with HEPA filters, found that air filters help improve asthma symptoms, and carried out a systematic evaluation in 2002. Published in Pediatrics in 2011, a recently updated well-designed study was also exposed to passive smoking at home by 200 children with asthma. I gave it half of the real HEPA purifier for children and half of the fake purifier for bedrooms. Year after year, the children’s HEPA group may reduce the number of visits by doctors to asthma attacks, but not decisively – the PM2-0.5 decrease in their families by 25%.
Other studies focused on allergies, including an interesting 2008 study that assessed children with over-recorded pet allergies, recorded lung function and blood markers, once a year. Years later, there was no significant difference in the use of allergic drugs or blood markers in the lungs among those using HEPA air purifiers. Another study in 1990 showed a 70% reduction in indoor PM 0.3 and an even more impressive improvement in allergic symptoms.
All these tips on health benefits still revolve around what I want to know about dancing on the edge of China and the developing world. In the United States, most air cleaners are marketed and tested for allergies and asthma. But in developing countries, air pollution is much more serious, so health risks are much more serious. We are concerned about the long-term risk of death, heart and lung diseases, and cancer contamination. These studies I mentioned do not answer the deeper question: Can long-term use of indoor air purifiers prevent death, heart and lung diseases, and cancer?
If you don’t eat it, you can live for three weeks, but you can’t live for three days, but you can choose food and water because you can’t live for three minutes without air. It’s hard to choose air. Respiratory health is very important for everyone because the respiratory system of the human immune system is much worse than that of the digestive tract.
Many years ago, I stayed in the house for a long time, opened a window to breathe fresh air, but now I have to close the doors and windows, outdoor pollution, haze raging, in this part of the “land”, this room is better indoors than outdoors? The answer is No.
Air purifiers of various purification technologies can purify dust, particulate matter, bacteria, formaldehyde, and other pollutants, and purify air purifiers and other professional purification devices. Air plays an important role.
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The higher the CADR value of air purifier, the better
Cloudy, in order to prevent PM2.5 particulate matter health hazards, many people often wear masks to travel abroad. However, people tend to concentrate on neglecting outdoor and indoor pollution. According to statistics, the biggest victims of indoor pollution are children, pregnant women, the elderly and patients with chronic diseases, especially children, who are more vulnerable to indoor pollution than adults. An air purifier is the first choice for many civilians to clean indoor air and protect the health of their families.
The operation of the domestic standard air purifier Rixin on March 1 this year will ensure that consumers choose the right air purifier, but one of the parameters is not yet fully clear. The following are the most common CADR values.
CADR (Clean Air Delivery Rate) is the abbreviation of the American Association of Consumer Electronics Manufacturers (AHAM) according to the strict test standards of air purifier testing and is the clean air output ratio. For more regulatory and regulatory test conditions than the new national standard air purifier under rated conditions, please refer to its purification capacity parameters. The two target pollutants include particulate matter and gaseous pollutants. Representing an air purifier means providing a relatively clean air rate and being able to clean cubic meters per hour to prove that the air purifier’s higher purifying performance is very good.
The performance and quality of air purifier mainly depend on the net airpower ratio (CADR value), the net airpower ratio, and the purifying efficiency of the purifier is higher. However, with the purchase of air purifiers, users should not be aware of the pursuit of high value, CADR values are not better based on the environmental areas they measure. When a user chooses a higher CADR which is worth using in a room of only 20 square meters, it often causes unnecessary waste and the air purifier can not even achieve the best effect.
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