Does an air purifier remove formaldehyde and is it effective? The birth of air purifiers not only makes our living environment better and better, but also as more and more people begin to pay attention to their physical health, products similar to household air purifiers are constantly recognized by more and more people. In order to find a relatively reliable product, we spent two months testing a number of well-known air purifier products, and finally found a related product that is more suitable for the public.
In this test, we will focus on the results of 4 aspects: 1. Indoor formaldehyde removal ratio 2. PM25. Detection ability 3, sterilization level 4, comprehensive use cost.
Before the formal assessment, we collected a few questions that were more responsive.
Can an air purifier clean formaldehyde?
What is the basis for judging an air purifier?
Is there moisture in the promotional content of the business?
Is the merchant exaggerating?
The brands in this evaluation are as follows:
Philips, Honeywell, GA, Shule's, 352 on a large domestic platform, the specific information of 5 well-known air purifier brands is as follows:
Test 1: Formaldehyde cleaning level.
Is the formaldehyde cleaning level of the household air purifier enough?
Does an air purifier remove formaldehyde and is it effective? Formaldehyde is one of the most obvious sources of air pollution in the home, and air purification ability has become the core demand of air purifiers, so everyone attaches great importance to this.
Test Objectives and Evaluation Criteria] Through the guidance of professionals, we strictly follow the setting of the family mode to carry out the test, and in this round of testing, each product has met the corresponding requirements.
Tips: The higher the CADR index, the stronger the purification power of the air purifier, and the CCM index knows that it has reached P4 and F4, which belongs to the highest level in the national standard.
Airflow Coverage Capacity: Is My Home's Air Circulation Qualified? In terms of indoor air circulation, this requires the air purifier to have enough power, otherwise it is easy to leave dead corners in the room.
Wind speed test] From the ranking of the smallest gears, the air outlet is the GA and Philips air purifiers.
Formaldehyde treatment capacity: The problem of treating formaldehyde in the indoor environment according to the real household scene is more serious, so we specially simulate the conventional layout of the general family in an indoor space of 50m.
Then we followed the steps below to test:
Set up multiple sampling points; 2. Replace formaldehyde with chemical solvents; 3. Use formal instruments to test data;
4. 1 hour after the solvent is released, the 5 products are tested separately.
The results of the formaldehyde purification power test are as follows:
Conclusion 1: All 5 products are qualified.
Does an air purifier remove formaldehyde and is it effective? In this round of testing, 5 products all met the requirements stipulated by the state (the national standard is 0.).08 concentration), and the fastest to complete the whole process is the air purifier and Shulox under the GA brand, which only took about 12 minutes to reach the corresponding standard, which also confirms the explanation of the CADR index.
Conclusion 2: There is a residual purification blind spot Although the performance of the 5 products is up to standard, there are still deficiencies in the details of some brands, among which Honeywell and Philips have a certain blind spot, where there is still a high concentration of solvent components.
It's not enough to just look at the short-term test results, because in real life, air purifiers need to work for a long time, so in order to see if there is a significant power decay of different brands of air purifiers, we decided to let them work for 60 days in a row, and then test again.
Does an air purifier remove formaldehyde and is it effective? Before starting the long-term test, we expected that the product's ability to remove formaldehyde would decrease to a certain extent, but we didn't expect the decline to be so large. Among these five products, only GA and 352 are within the acceptable range, and the decline of the remaining three is relatively poor, and the ability to remove formaldehyde is disappointing, while Philips's purification ability has the highest decline, at about 18%.
The purification levels of different brands of air purifiers after 60 days are as follows:
For the average consumer, because there is no professional monitoring equipment for verification, it is easy for some sellers to fool around. Based on the above results, it shows a problem, to a certain extent, the high value of the air purifier can indeed have a relatively good purification ability, but if it is to be used for a long time, it depends on the purification staying power of the air purifier. After all, the values on the manual must be the optimal values obtained from the first use of the air purifier.
Test 2: PM25. Detection sensitivity: PM25 is a headache for many people, in order to test the sensitivity of the probe of the air purifier, we specially put different brands of air purifiers in a confined space, and then pour smoke into the test, from the actual performance, the fastest identification is still Shuleshi and GA air purifier.
Tips: The higher the sensitivity, the faster the reaction time; The less time to complete, the more PM25. The higher the purification capacity.
Test 3: Disinfection and sterilization effect, how to choose if there are elderly people and children at home.
It is also very important to sterilize indoor air, in order to protect the health of the family, everyone is very concerned about the filtration technology of the air purifier
In order to let everyone see the bacterial residue after purification more intuitively, we also specially use nutrient agar plates to check.
Visualized strawberry test] Considering that you may not know much about this problem, we specifically use strawberries to make a more visual display and see how different groups of strawberries will change.
Tips: Strawberries are more susceptible to mildew due to the influence of bacteria in the air, so the difference can be intuitively reflected when used for testing. Edible: After two days of testing of Schulox and GA, it was found that the strawberries of the GA and Schulox groups could still be eaten normally.
Mildew: Philips, Honeywell, 352 and the other three groups were disappointing, not only did they have mold, but some of the strawberries had been severely rotten.
Strawberry status before testing:
Strawberry state after 2 days:
Most air purifiers advertise sterilization, but only a small number do."
Total amount of bacteria] In terms of bacterial residue data, it is consistent with the test results of strawberries, and the least are the two groups of GA and Shule's.
Test 4: Cost of use.
With an air purifier, which filter is more cost-effective Since the air purifier needs to replace the filter regularly, we learned about the corresponding ** information on the official website. On average, the cost of using GA air purifiers is low at about 1 yuan per day, and the highest is Shule's, which costs about 2 yuan per day.
Final summary: 5 major brand evaluation scores.
Conclusion: After 2 months of testing, we finally found a star air purifier product that we can recommend to everyone, that is, a GA air purifier with a very high cost performance, comprehensive performance, use cost, purification capacity, etc., this one is the most cost-effective, suitable for most families. When you buy an air purifier, you should maintain a certain judgment ability to avoid being fooled by the slogans of the merchants.