What kind of air purifier can not buy?How to choose air purifier?

Air Purifier Purchase Guide

I. Precautions

1 attention to the key parameters:

1.CADR value (clean air output rate): This is an important indicator of the purification capacity of the air purifier, representing the amount of air purifier air purifier can be purified per hour, the unit of cubic meters per hour. the higher the CADR value, the greater the purification capacity. The higher the CADR value, the higher the purifying power. You can choose the appropriate CADR value according to the area of use, and the formula is: purifiable area = CADR value x coefficient (0.07 - 0.12) . For example, for a space of 50 square meters, the more appropriate CADR value is about 50 ÷ (0.07 - 0.12), i.e., 417 - 714m³/h. In general, the bedroom, bathroom, and other small spaces, you can choose the CADR value of the product is relatively low; large new homes, offices, and other large spaces, you need a high CADR value of the product.

2. CCM value (cumulative purification capacity): divided into solid pollutants (particulate matter) CCM value and gaseous pollutants (such as formaldehyde, etc.) CCM value, on behalf of the air purifier filter in the saturated state of the cumulative adsorption or removal of pollutants before the quality. the higher the CCM value, the longer the service life of the filter. Particulate CCM value is divided into P1 - P4 four levels, P4 corresponds to ≥ 12000; gaseous CCM value is divided into F1 - F4 four levels, F4 corresponds to ≥ 1500, try to choose the product with high CCM value when shopping, such as P4, F4 level.

3. Purification energy efficiency: refers to the ratio of CADR clean air volume and rated power, divided into particulate matter purification energy efficiency and formaldehyde purification energy efficiency. For particulate purification energy efficiency value, 2 for qualified level, 5 for high efficiency level; for formaldehyde purification energy efficiency value, 0.5 for qualified level, 1 for high efficiency level. The higher the purification energy efficiency, the more power saving in the case of equal amount of purified air.

4. Noise: air purifier work will produce some noise, noise will affect the life and work. Generally speaking, the noise in the 55 - 70 dB or so is relatively normal, put in the bedroom use, try to choose the lowest noise value in the 40dB or so products. Can pay attention to the product labeled noise indicators, or check the user reviews to understand the actual noise situation.

2. Filter related:

1 filter types: mainstream filters are HEPA filters, activated carbon filters, photocatalysts, negative ions, composite filters, etc. HEPA filters are mainly filtering small particles; activated carbon filters for adsorption of harmful gases and odors; photocatalysts can decompose harmful organic matter; negative ions can be deposited particles, sterilization. It is recommended to choose a multi-layer filter combination of products, such as including the primary filter, HEPA filter, activated carbon filter, etc., in order to achieve a more comprehensive purification effect.

2. Filter level: HEPA filter level commonly H11, H12, H13, etc., the higher the level, the higher the filtration precision, such as H13 level filtration rate of > 99.97%, try to choose H13 and above the level of the filter.

3. Filter service life and cost: different materials have different service life, such as HEPA filters generally 6 - 12 months, activated carbon filters 6 - 12 months. Understand the replacement cycle and cost of filters to avoid the high cost of late use. Some merchants claim that the filter can be used for a long time or even for life, only need to be cleaned regularly, this claim lacks scientific basis, need to be careful.

3 Function and design:

1. Intelligent functions: such as remote control, timer switch, automatic monitoring of air quality and other functions can provide a more convenient use experience. However, these features may increase the cost, choose whether you need them according to your personal needs.

2. Applicable area: Ensure that the applicable area of the air purifier matches the space used, otherwise the purification effect may be affected. If you use a machine with too small a CADR value in a large space, the purification effect will be greatly reduced.

3. Appearance and convenience: Consider whether the appearance of the air purifier is coordinated with the home environment, and whether it is convenient to move and operate, such as whether there is a carrying handle, universal wheel, and whether the operation panel is simple and easy to understand.

4. Brand and after-sales service: Choose air purifiers of famous brands, which are more guaranteed in product quality, technology development and after-sales service. Check the brand's market reputation, user evaluation, and understand whether there are common problems with the brand's products. At the same time, understand the content of after-sales service, including whether it is convenient to buy and replace filters, the length of the warranty period, after-sales maintenance response speed.

Second, easy to step on the pit

1. Purification effect is exaggerated: some merchants publicize the product has a high efficiency filtration system, but the actual purification ability is limited, may only adsorb dust and pollen, can not filter tiny bacteria and viruses. Purchase should pay attention to whether the product has been authorized certification, not just listen to business propaganda.

2. Inaccurate data monitoring: Inaccurate data monitoring will lead to the inability to understand the real indoor air conditions, affecting the purification efficiency, but also may make people think that the environment has been purified. You can check the brand and model of the sensor used in the product to understand its accuracy, or refer to other users' comments on the accuracy of the data.

3. Harmful gas residue: Some air purifiers do not have enough capacity to deal with harmful gases, only simple adsorption, can not be completely decomposed, harmful gases may be evaporated again to cause secondary pollution. Concerned about the product in addition to aldehydes and other harmful gases, such as whether the decomposition technology rather than simple adsorption, you can check the product description or consult customer service to understand.

4. Secondary pollution: the lack of self-cleaning function of the air purifier may accumulate dust and moisture inside, become a breeding ground for bacteria and mold, resulting in secondary pollution. Choose products with certain self-cleaning function, or easy to clean and maintain, and clean the air purifier regularly.

5. Ozone problem: Some air purifiers produce ozone during operation. Ozone is a strong oxidizing agent, and even low concentrations can be harmful to human health. In particular, products that use ultraviolet sterilization, electrostatic dust collection, and negative ion sterilization technology may produce ozone. Choose to go through the Health Commission record of the product, its ozone emissions need to be tested, the concentration is lower than the national standard; verify the record of information and product correspondence, to avoid purchasing although the record, but the actual ozone exceeds the standard products; confirm whether the test report has a health commission watermark, pay attention to the amount of product ozone emissions, try to choose 0 ozone release products.

Third, the merchant set

1. Emphasize the importance of CADR value but mislead the choice: merchants overemphasize the CADR value, but do not mention the need to use the area to choose the right product. And the higher the CADR value, the faster the rate of consumption of filters, business to improve CADR value to speed up the fan speed, will make the filter consumption faster, increasing the cost of use. Need to rationally look at the CADR value, combined with the actual use of the area to choose, while focusing on the cost of filter replacement.

2. Concealment of ozone release hazards: most products can not do 0 ozone release, merchants in order to protect sales, conceal the release of ozone products, and even embellish the “oxygen purification”. Some merchants claim that the concentration of ozone release in the safe range, but the ozone is cumulative, long-term use in a sealed room may lead to ozone concentration exceeds the standard. When purchasing, take the initiative to ask the product ozone release, and ask the business to provide relevant test reports.

3. Exaggerate the life of the filter: merchants to attract consumers, exaggerate the life of the filter, claiming that the filter can be used for two years or even longer, or claim that the filter life-long use, only need to be cleaned regularly. But different materials have their normal service life, cleaning can not restore the adsorption capacity of the filter. Understand the service life of common filters, the business publicity to remain vigilant.

4. False propaganda price and performance relationship:

1 high price, low energy: publicize the high price of the product is good, create gimmicks, concepts to attract users, such as “negative ions”, “no consumables technology”, etc., but in the core of the purification and filtration performance is limited to enhance the high price of more than the IQ tax. Can not be judged only by the price of the product advantages and disadvantages, need to consider the performance indicators.

1 low-priced poor quality: low price to attract consumers, but the product may have poor purification effect, serious harm and other issues, such as difficulty in effectively filtering bacteria and viruses, hair, dust, formaldehyde, etc., long-term use may be hazardous to health. Don't buy low-priced low-quality products, to avoid late losses.

5. False propaganda deformaldehyde effect: claiming that the short-term efficient removal of formaldehyde in the new house or completely purify formaldehyde, etc., and formaldehyde release is a long-term process, such propaganda to mislead consumers. Understand the scientific principles of formaldehyde purification and the actual difficulty of over-exaggerated formaldehyde publicity to remain skeptical.

6. The use of low-power UV lamps: the use of low-power UV lamps sterilizing, covering a small area, low efficiency, the actual effect is limited. Relatively speaking, the double-sided lamp design sterilization performance is stronger. Purchase to understand the product sterilization technology and lamp beads, lamp configuration.

7. Exaggerated product parameters, in fact, does not meet the standard: to promote their own 100% in addition to formaldehyde, in addition to PM2.5, etc., but the actual can not be done at all, by exaggerating the value to attract consumers. Check whether the product has an authoritative test report to support the promotional parameters, or refer to professional reviews and other users of the actual use of feedback.

8. Poor professionalism, after-sales service is not guaranteed: many brands are not professional after-sales service, can not find people with problems, maintenance trouble, with a variety of reasons to cope with customers. When choosing a brand to understand its after-sales service reputation, give priority to brands with good after-sales service.

Suggestions for avoiding the pit

1. Define their own needs: choose an air purifier according to the actual use scenarios and needs, such as the newly renovated house focusing on the function of deformaldehyde, allergic people focus on the effect of filtering allergens, and so on.

2. Understand the product through multiple channels: Check professional review websites, industry forums, consumer feedback, etc., to understand the advantages and disadvantages of different brands and models of air purifiers, the actual use of the effect, common problems, etc., as a reference for purchasing.

3. Check certifications and reports: Make sure the product has relevant authoritative certificates, such as the national standard certification, the Health and Welfare Commission record (involving sterilization function products). Require businesses to provide product test reports to check whether key indicators such as CADR value, CCM value, ozone release meet the standards.

4. Field inspection and trial: If you are in a position to do so, you can go to an offline store to inspect the air purifier on the spot, observe the appearance of the process, ease of operation, and feel the noise level. Some stores may provide trial services to further understand product performance.

5. Calculate the long-term cost: In addition to the purchase price, consider the cost of filter replacement, energy consumption and other long-term use costs. Choose products with long filter life and low energy consumption to reduce the overall cost of use.

6. Rational treatment of publicity: Do not be confused by the exaggerated publicity of the business, and be alert to the content of the publicity that is too absolute or not in line with common sense, such as “immediate deodorization”, “100% purification” and so on.

V. Conclusion

When buying an air purifier, you need to fully understand the product parameters, filter conditions, functional design, brand after-sales information, and be alert to the common exaggerated publicity, concealment of the problem and other traps, to avoid falling into the purification effect of the exaggerated, inaccurate data, harmful gas residue, secondary pollution, ozone hazards and other purchasing traps. By clarifying your own needs, understanding the product through multiple channels, and checking certification reports, you can rationally purchase an air purifier that suits your needs and create a healthy and fresh indoor environment for your family.