About air purifier

2025 Do not be deceived by the gimmick of the business, air purifier most complete guide to avoid the pit

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Author : Susan Huang
Update time : 2025-08-06 12:03:46

New house deodorisation, new house decoration worried about formaldehyde in the home? Mother and baby disinfection, have a child anxiety virus bacteria on the baby's health and safety have an impact? Pet deodorisation, have pets feel odour at home? It is because we have doubts in this regard, so the air purifier is also increasingly popular among the public, we have an increasing demand for air purifiers, but the quality of the market products are uneven, do not understand the air purifier friends and even by the business cut leeks, if you choose the wrong air purifier, not only can't do to purify the air, and even contaminate the indoor air, a serious threat to the family's Health. Therefore, how to avoid the rubbish products, pick to the high reputation of high-quality air purifier has become a problem.

Next let's talk about how to close the pit when buying an air purifier, less detour!

One. Ozone hazards to different people

The biggest hazard of air purifiers is the production of ozone, but the amount of ozone produced by each air purifier is different, some ozone release a lot of ozone, some ozone release very little, the best of course, is the 0 ozone release, will not produce a little threat to us. The harm of ozone to the human body is insidious and cumulative, long-term exposure to ozone environment will also cause serious effects on the body's organs and tissues, even if we get treatment in time, it will still leave a variety of sequelae, so we need to pay extra attention. Before I introduced the air purifier safety and health issues when I emphasised that the harm of ozone for the human body is very serious, whether it is a low concentration of ozone or a high concentration of ozone will affect our health, especially with children, pregnant women and the elderly family, the harm caused by ozone is even more serious.

1, the harm of low concentration of ozone

① airway inflammation: ozone has a strong oxidative properties, even if the low concentration will not change the characteristics of ozone, in the breathing of the ozone will enter the respiratory tract, the respiratory mucous membranes irritation, triggered by coughing, sore throat and other symptoms, the impact of asthma patients is particularly pronounced, will not only aggravate their condition, but also lead to respiratory difficulties.

② Increased blood viscosity: ozone will destroy cardiovascular endothelial cells, may activate platelet aggregation, increasing the probability of thrombosis.

③ Decreased immune function: ozone will destroy respiratory cilia and mucosal barriers, making it easier for pathogens to invade our bodies, increasing the risk of respiratory infections, and also exacerbating allergic reactions in allergy-prone people. And low concentrations of ozone for the human body is more harmful than that, for the eyes, cardiovascular, nervous system, chromosomes and other systems and organs will cause different degrees of impact, while low concentrations of ozone also has a chronic, cumulative characteristics of the human body is self-evidently harmful.

2, the harm of high concentration of ozone

Why do I need to introduce the harm of high concentration of ozone? That is because the low concentration of ozone in the sealed or unventilated environment will continue to accumulate, due to the slow decomposition rate, resulting in the use of air purifiers the longer the ozone concentration will be higher, and ultimately the formation of a high concentration of ozone, and more than 0.1 ppm has exceeded the safety standards for indoor ozone.

① damage to the respiratory system: long-term inhalation of ozone can cause toxic pulmonary oedema, lung function and lung tissue damage, but also induce or aggravate the symptoms of asthma, studies have shown that asthma patients are in the ozone environment, the risk of asthma attacks increased substantially.

② damage to the nervous system, inhalation of large amounts of ozone will affect the human nervous system, ozone can pass the blood-brain barrier, direct effect on the brain, resulting in neuronal damage or death. Long-term exposure to ozone may also cause cognitive decline.

③ Damage to the blood system: Long-term exposure to ozone affects the level of antioxidants in the blood, including, but not limited to, reducing the activity of antioxidant enzymes, which can further exacerbate the state of oxidative stress, thereby affecting the health of the blood and increasing the risk of hypertension, atherosclerosis and heart disease.

④Damage to the immune system:Prolonged exposure to ozone can lead to decreased immune system function. Ozone weakens the activity of white blood cells and reduces the number of immune cells, which makes the human body more susceptible to bacterial and viral attacks and increases the risk of cancer. Especially for the elderly, children and pregnant women, ozone weakens their immune system and increases their risk of contracting diseases.

⑤Cancer Risk:Ozone itself is not considered a direct carcinogen, but long-term exposure increases the risk of lung and skin cancer because ozone interferes with cellular self-repair and suppresses the immune system when it enters the body, leading to an increased risk of cancer.

Therefore, for the sake of everyone's life and health, I suggest that when purchasing an air purifier, you choose a product that produces less ozone, preferably 0 ozone. However, if there are children, pregnant women or the elderly in the house, then you must choose the air purifier that produces 0 ozone.

Second, the selection of air purifiers of the five major misconceptions

1, not concerned about the release of ozone

After reading this article we should have a certain understanding of the dangers of ozone, but how do we know whether the air purifier will produce ozone? In fact, it is very simple, most of the merchants in the Health Commission for the record will do the relevant ozone test, so we can go directly to the merchants to ask for a test report, the test report will be clearly marked out above the amount of ozone released by the product will be how much, but there is a detail we need to pay attention to. That is, the test report must be issued by a professional organisation. Part of the business will come up with a private agency issued by the test report to try to muddle through, but the report issued by this agency, whether it is the accuracy of the data or the authority of the agency can not be trusted, only CMA, CNAS, ilac-MRA certified by the authority of the test report issued by the agency is accurate.

2, do not choose a professional brand

Many non-professional brands on the market may have false parameters, poor purification effect, ozone and other issues, the CADR value on the product page may be marked very high, but the actual experience will find that the purification effect is particularly poor, and can not meet our purification requirements, which also leads to part of the people to produce 'air purifiers are IQ tax! The idea of “air purifier is IQ tax”. At the same time non-professional brands in the core technology there are also significant flaws, some models use are inefficient poor quality filtration filters, not only adsorption can not be done to break down the role of formaldehyde, but also lead to the generation of secondary pollution, the purifier into a source of pollution.

In order to choose a professional brand, that is because the professional brand in the field of air purifier ploughing for a long time, whether it is the exclusive core technology or after-sales personnel expertise, are not the kind of halfway out of the brand can be comparable to professional brands in the air purification industry heritage is both their advantage is also a guarantee that they provide quality service.

3, running noise is too large

Everyone in the purchase of air purifiers concerned about a lot of things, such as: CADR value, deodorisation purification function, the number of viruses eliminated, but only forget the noise will have an impact on our lives. While it is important for air purifiers to be effective in removing aldehydes, it is also important to be aware of the noise that is generated when the air purifier is in operation, especially during the night time when we are sleeping. After all, we buy air purifiers to improve our lives and reduce anxiety about air quality, but if we buy an air purifier that makes too much noise, it will not only affect our mood over time, but also our physical health. Therefore, when purchasing, you must pay attention to the size of the sound made by the air purifier during the night, and never be cautious of choosing an air purifier that makes too much noise. Some people may think that as long as the product can work, the noise is not intolerable, but in fact there is a buzzing machine around every day, not only will affect our mood will also lead to health problems, so we had better pay attention to the size of the noise before buying an air purifier.

4. Obsessing over high parameters

Why shouldn't you obsess over high parameters? Because the higher the CADR value, the faster the filter will wear out. To increase the airflow, manufacturers will increase the fan speed, which not only produces more noise but also significantly reduces the filter's lifespan. These are things manufacturers won’t tell you. They only emphasise how quickly high parameters can purify the air, but in reality, we don’t need such high parameters. Research shows that a CADR value of 1:10 relative to the area to be purified is sufficient for daily life. Therefore, when purchasing an air purifier, it’s important to consider your actual needs and not blindly pursue high parameter values.

5. Be cautious when purchasing air purifiers without National Health Commission (NHC) registration.

NHC registration refers to products that have passed the review and registration of health administration departments, meeting national health standards and management requirements. Registration not only means the product’s production and use comply with national standards but also ensures the entire production process is supervised, guaranteeing consistent quality and reducing the risk of purchasing counterfeit products. The primary function of air purifier registration is disinfection and sterilisation, which follows stricter standards, while ordinary air purifiers primarily remove particulate matter and formaldehyde, with different standards for each. Therefore, registered air purifiers are more reliable for disinfection and are suitable for scenarios with high hygiene requirements, such as households with pregnant women, children, or patients.


6. Ignoring filter costs

Some brands adopt a marketing strategy of ‘low-cost main unit, high-cost filters,’ meaning that while the machine can be purchased at an extremely low price, replacing the filters later on incurs high costs. Additionally, to increase the frequency of filter replacements, some brands even use filters with lower purification efficiency, shortening their lifespan and significantly increasing usage costs. Additionally, even professional brands may have high-priced filters. Therefore, it is essential to check the filter prices before purchasing and choose products you can afford. After all, people buy air purifiers for long-term use and do not want them to become idle due to filter costs.

When introducing the products, I mentioned the cost of replacing filters for each model. As you can see, the ongoing costs vary significantly between products—some can be used for a year with just a few hundred pounds, while others require frequent replacements even with a few thousand pounds. Therefore, when making a purchase decision, it is advisable to consider the filter cost. After all, a machine costing several thousand pounds should not be discarded after just a short period of use.

 

III. Conclusion

Based on the above content, I have made a brief summary. When purchasing an air purifier, first prioritise machines with zero ozone emissions, preferably those with professional testing reports; then consider the product’s various parameter values and noise levels, selecting a suitable model based on your actual requirements; finally, consider the long-term filter costs and choose an air purifier that fits within your budget.

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