How long do air purifier HEPA filters last?

At present, all mid-to-high-end air purifiers use pure physical filtration technology based on activated carbon filters and HEPA filters. According to the technical person in charge of Allerair air purifier: the medical-grade HEPA filter material is made into a filter element and installed in the air purifier, and the actual purification efficiency and service life of the air purifier are completely different due to the influence of factors such as the sealing degree of the purifier itself, the air volume and wind pressure of the fan, the matching degree of the air volume of the fan and the overall filtration system, the quality of the HEPA filter pre-filter (thickness and thinness), and the pollution degree of the working environment of the purifier.

For example, the Allerair air purifier is equipped with a primary filter, a double-layer antibacterial filter, and an activated carbon filter in front of its HEPA filter, which can filter most particulate pollutants with sufficient weight, large thickness and large wind resistance, and can filter most particulate pollutants, and the basic ones that can reach the HEPA filter are some ultra-fine particle pollutants and bacteria and viruses, so the life of the HEPA filter can be as long as 5 years or even longer. On the contrary, if the same HEPA filter is installed on an ordinary purifier, due to the thin pre-filter and poor air volume and filter match, it is likely that large particle pollutants will break through the HEPA filter in a few days, thereby reducing the purification efficiency of the HEPA filter and even causing the HEPA filter to be scrapped. Therefore, the life and purification efficiency of air purifier HEPA filters are completely different in different purifiers, which is one of the main reasons why the purification efficiency of high-end air purifiers is different from that of low-end air purifiers.

Depends on the degree of pollution of the environment.

HEPA (highefficiencyparticulateairfilter), Chinese meaning high-efficiency air filter, up to HEPA standard filter, for microns and microns effective rate, HEPA mesh is characterized by air can withstand the state banquet to pass, but fine particles can not pass.

What is HEPA, which is often seen when buying air purifiers?

HEPA filter is a dry high-efficiency air filter that can be processed, and there are many kinds of materials that make up HEPA, which can be divided into PP (polypropylene) high-efficiency filter paper, PET filter paper, PP and PET composite high-efficiency filter paper, and glass fiber high-efficiency filter paper. Among them, PP (polypropylene) is paper, so it is generally not washable. The other part of the HEPA filter is made of PET or PTFE, which is the origin of many claims on the Internet that the HEPA filter is washed, but the efficiency of PET is very low.

What is it capable of? HEPA is mainly used to capture the following particles, dust and various suspended solids. The use of ultra-fine glass fiber paper as the filter material, offset paper, aluminum film and other materials as the dividing board, and the wooden frame aluminum alloy glue, made of special silicone rubber, no odor, the surface will not harden, there will be no cracks for a long time, stable chemical properties, corrosion resistance, can absorb the stress caused by thermal expansion and contraction without cracking, moderate hardness, good elastic recovery.

What are its advantages?

1.The filter has a high purification efficiency in a single time.

2.The purification rate decreases slowly with air volume and use time.

3.The high-efficiency HEPA filter can intercept the main virions.

Its filtering mechanism?

There are four types included. 1.The first is the interception mechanism, which works on large particulate matter.

2.The second mechanism is the effect of gravity, in which particles with small volume and high density will move at a reduced speed when passing through the HEPA filter and naturally settle on the HEPA, which is similar to the process of sediment settling in the lower reaches of the river.

The third mechanism of the filter is the influence of airflow. Due to the uneven weaving of the HEPA filter, a large number of air vortices are formed, and the ultra-small particles are adsorbed on the HEPA filter by the traces of this cyclone to achieve the purpose of filtration.

4.The fourth filtration mechanism is that the ultrafine particles hit the HEPA filter fibers under the action of Brownian motion, and are affected by van der Waals force and are filtered.

The general duration is 3 months to 6 months, depending on the use environment and frequency of use, if there are the following situations, it is necessary to consider replacement.

A sign that the HEPA filter needs to be replaced.

1: The air volume of the air outlet is significantly smaller, and the noise is significantly larger.

2: The color of the HEPA filter becomes very black.

3: The purifier has a peculiar smell.

What you need to pay attention to when replacing the filter.

1: Don't believe that a 10-year HEPA filter can be used.

HEPA filters that last up to 10 years may exist, but they are not used in air purifiers, but in the clean rooms of industrial plants. So why can this HEPA filter be used for 10 years, because in front of this HEPA that can be used for 10 years, there are 5 or 6 primary, medium-efficiency, and sub-high-efficiency filters in front of it to help it filter relatively large dust particles, and this 10-year filter only filters the tiniest and most difficult dust in the last pass. Just like the battlefield, through the sacrifice of countless small soldiers, the survival of the general was finally preserved.

If there is only one general at the beginning, he may be knocked out as soon as he plays.

2: Don't be reluctant to replace.

As a consumable, it is not recommended to leave the HEPA filter unreplaced for a long time, and it is best not to clean or clean it. It's not because I'm a businessman and I go against my will for profit. I'll use a disgusting analogy, the HEPA filter is actually the same as a paper towel, when you finish wiping your mouth, I don't recommend you to brush it with a brush, or wash it and keep it tomorrow before continuing to wipe your mouth.

The same goes for HEPA filters, which not only help you absorb dust, but also all kinds of bacteria during use. When you feel a pity, vacuuming can only remove some inconsequential large dust, and bacteria and small particles cannot be removed.

In fact, if you think about the reason for buying an air purifier, it is either that there are children at home, or pregnant women, or the elderly, or the sick. The role of air purifiers is to prevent these susceptible people from being harmed by the disease. Although it costs money to buy medicine, it reduces the pain of the suffering of loved ones.

Money can't buy that.

The above text is excerpted from the article "How often does the HEPA filter of an air purifier need to be replaced?"

HEPA mesh is mainly to filter dust and large particles, generally a year, if the home environment is relatively poor, it is generally replaced every six months, and it is not expensive to change, generally two or three hundred can be, no mistake the general machine has a filter replacement prompt, will prompt you what to replace, Gao Jieya.

Usually dirty, use a vacuum cleaner to suck the dust on the surface, it is recommended to change it once every six months. Because the interception of the HEPA filter absorbs more dust, the resistance increases, and the air output is smaller, then the effect of clean air is not good, and there will be bacteria on the filter screen, thank you.

The normal application should be one year.

Compared to the green mountains and green waters in the south, the winter in the north looks a little pale. From heavy snow, hoarfrost to smog, the quality of air quality not only affects everyone's travel, but also brings hidden dangers to our health. Therefore, many people turn on air purifiers in winter to improve indoor air quality.

So, are you able to use an air purifier properly? If not, take a look at the following common sense.

Activated carbon filter.

Therefore, the activated carbon filter needs to be replaced every once in a while for air purifiers. At present, most purifiers on the market are equipped with the filter life display function, but in fact, the activated carbon life cannot be detected by the sensor, this function is only the manufacturer's approximate estimate of the activated carbon life, according to the actual use, the activated carbon filter life is actually different. However, it is certain that if there is a peculiar smell during the use of the air purifier, or if the indoor air quality does not improve after turning on the purifier, the filter must be replaced in time.

Follow the instructions.

After the user buys the air purifier, he must read the instruction manual carefully before using the new machine, and at least clarify the precautions for the use of the filter element, power supply and safety precautions. Generally, the filter element of a small machine needs to be disassembled before use, and the outer packaging needs to be removed before it can be installed. The product manual has always been the most easily overlooked thing, but reading the manual can make us quickly understand the product performance and the use of various functions, so that there will be no machine bought for a long time, one day suddenly found that it still has this function.

Replace the filter regularly.

The core part of why air purifiers can filter harmful air such as smog is the use of filter elements (filters). If there is no filter (filter), there will be no substance to purify the polluted air, and the air purifier will not be able to play its role. Therefore, the filter element (filter) is very important for the air purifier, and it should be maintained, cleaned and replaced frequently.

The filter element (filter) of an air purifier is a consumable, and it has a limit of use. In order to make your breathing environment healthier, it is recommended that users change the filter element regularly, and we can replace the filter element according to the use time given by its brand. If it is in a more seriously polluted place, it may be replaced more frequently, it is recommended that it is generally 3-6 months, if it is heavily polluted, then it is necessary to shorten the time to ensure the purification effect.

Open windows regularly for ventilation.

The air purifier is easy to use, we only use it to purify the indoor air in winter, and we don't need to open the window for ventilation? In fact, when the air is ***, it is still recommended that users open the windows regularly for ventilation.

Using an air purifier requires closing doors and windows, and it is not healthy to close the doors and windows for a long time and turn on the air purifier. Because the oxygen in the indoor air is limited, after people use air purifiers to purify the dirty air in the room, if no new air comes in, the quality of the indoor air environment will also be affected in the long run. Therefore, when the outdoor air quality is good, we can turn off the air purifier, open the doors and windows, ventilate, and improve the indoor air environment.

The air purifier filter in my house is replaced every three months, and the replacement method is very simple.

This needs to be replaced frequently, after all, it is to purify the air, I personally recommend changing it once a month, which will make the machine more durable, and the air purification effect will be very good.

In order to maintain a good purification effect, it is recommended to replace the filter once a year. If it is used in dusty occasions, or if it is used frequently, it should be replaced in advance as appropriate.

At present, the mainstream technology of mid-to-high-end air purifiers on the market is activated carbon and HEPA-based physical filtration technology. So what is the role of HEPA in an air purifier?

According to the technical lead of Allerair air purifiers, HEPA (High Efficiency

particulate

airfilter), which means high-efficiency filter in Chinese. HEPA standard filters, effective for microns and microns, HEPA filters are characterized by air that can pass through, but fine particles cannot pass through. It can remove particles with a diameter of more than microns (1 200 of the diameter of a hair) and is the most effective filter medium for pollutants such as smoke, dust and bacteria.

At present, many air purifier manufacturers on the market claim that their air purifiers use medical-grade HEPA filters, and claim that their purification efficiency is even higher. So is it possible to achieve the purification efficiency of an air purifier equipped with a medical-grade HEPA filter?

According to the technical director of Allerair air purifiers, the purification efficiency of real medical-grade HEPA filter media can achieve for particle-like pollutants. However, the medical-grade HEPA filter material is made into a filter element and installed in the air purifier, and the actual purification efficiency of the air purifier will be lower than that of the HEPA filter material itself due to the influence of factors such as the sealing degree of the purifier itself, the air volume and air pressure of the fan, the matching degree of the air volume of the fan and the overall filtration system, the quality of the HEPA filter pre-filter (thickness and thinness), and the degree of pollution of the working environment of the purifier.

Therefore, the purification efficiency of the HEPA filter media does not represent the actual purification efficiency of the purifier product. The actual purification efficiency of the air purifier is true and reliable based on the data measured by the product quality inspection agency.

When consumers buy air purifiers, they must read the test report of the modified air purifier issued by the authoritative department, and pay attention to the initial pollutant concentration, the size of the test chamber, the test time and the test results in the test report. In addition, during the use of the purifier, the purification efficiency of the filter material in the machine will gradually decrease with the increase of use time.

The HEPA filter is currently the best filter that can filter micron substances, and the filtration effect is the core component of the air purifier.