replace air purifier filter

How Often When To Replace Air Purifier HEPA Filter

Due to air pollution, many families are using air purifiers.However,most of the users have no idea about how often to replace air purifier filter or HEPA filter, the air purifier is not just bought and kept on. The air purifier needs to be replaced regularly, otherwise the inhaled dirt will be blown into the air again. So when to replace the air purifier filter?

How do I know when to replace air purifier filter?

Under normal circumstances,the air purifier filters need to be replaced once a year. And we need to Judge comprehensively according to the air output,smell and the use time shown in the manual. When the air purifier is used for a certain period of time,the air output will be reduced, which means that the filter has reached a certain degree of adsorption saturation, and it is necessary to consider replacing the filter. When the air purifier is used for a long time or has not been used for a long time, it will produce peculiar bad smell. This means that the filter has lost a certain degree of purification ability and may breed molds. At this time, we should replace the filter as soon as possible. The service life of the filter is also closely related to the environment. If the air purifier is used in a heavily polluted area, the life of the filter will be lost faster, so replacing the filter in time is the first to ensure respiratory safety.

when to replace air purifier filter

How often should you replace your air purifier filter

First of all, we have to look at the number of uses. If you have to keep it on every day to ensure that the indoor air is not contaminated by dust outside, then the frequency of replacement of the air purifier filter is higher,and it is best to replace it every 3-5 months.If the filter element is not replaced, the air purifier will not have any purification effect.The replacement time can be appropriately lengthened if the number of uses is small. It also depends on the air quality.Generally,we don't need to use a purifier when the air is good,which can also increase the service life of the air purifier filter.
The pre-filter (primary filter) can be replaced once every 3 months. If the manufacturer indicates that the filter can be washed with water, it needs to be dried or blown dry with a hair dryer before being installed in the air purifier.In the maintenance of the activated carbon filter,it can be replaced every 6-9 months.It can be taken out regularly and exposed to the sun, which can remove the peculiar smell and relatively extend its service life.But the effect is always getting weaker and weaker,so it should be replaced in time to avoid saturation.

How often to replace hepa filter

Generally,the HEPA filter cannot be washed with water, it is usually replaced every 6 months.In areas with more serious pollution,the filter life may be shorter. You can open the air purifier door every 3 months to check the condition of the HEPA filter. When the filter turns from white to black,it should be replaced.The replacement cost of the HEPA filter is relatively high.You can change the pre-filter frequently to appropriately prolong the life of the HEPA filter.But in order to ensure the air purification effect,when the HEPA filter is saturated, we must replace it as soon as possible.

when to replace HEPA filter

Disadvantages of not replacing the filter in time

1.Lead to secondary pollution

If the filter of the air purifier reaches saturation and is not replaced in time, the accumulated pollutants will breed many bacteria and viruses.The air purifier will blow these bacteria back into the indoor air, which will cause secondary pollution of the indoor air. .

2.Dirty filter elements will increase electricity bills

The more pollutants clogged in the air purifier filter, the harder it is for air to pass through. And this is the basic principle of the concept pressure drop, which refers to the resistance encountered by dirty air passing through the filter medium of the filter element. The greater the density of the material, the more pollutants will accumulate on the filter,and the more dirt that is clogged in the filter element, the greater the pressure drop when the air passes through the filter element. Because the increased resistance restricts the airflow, the more air will be Difficult to pass. This leads to higher energy costs, and higher pressure drops mean that the machine system must operate at full capacity and consume more power to transport air through the filter media. This means that the longer you delay the replacement of the filter element, the more you may end up paying for electricity.

3.Damaging the air purifier system

Long-term use of the oversaturated filter will cause the air passage rate to decrease, and long time operation of the fan will put extra pressure on the fan system and motor. The additional pressure on these components may damage the components, overload the purifier motor, and eventually cause the system to Crash faster than expected, thereby shortening the service life of the air purifier.

4.The dirtier the filter, the less clean air will be purified

Generally, the quality of an air purifier is judged based on the cubic feet per minute of CFM and the hourly air change of ACH. CFM is abbreviated as airflow, which refers to the amount and speed of air that the air purifier can purify. ACH refers to how much air can be purified in one hour in a limited space. These acronyms are basically industrial terms that indicate the degree and speed at which the purifier sucks dirty air into the system, filters it, and discharges it as clean air. When the filter element is blocked by pollutants, the air purifier cannot produce enough clean air, making it difficult for the purifier to keep up with the rate of new pollutants entering the air. When the internal activated carbon is saturated, it will no longer be adsorbed, so the filter element needs to be replaced every few months.
how often to replace HEPA filter
To conclude, particulate matter is constantly being filtered, even if new pollutants enter the air you breathe from various sources of indoor and outdoor pollution. Clean air is continuously delivered to the air. When your filter element is clean, the air can pass through the filter medium unimpeded, maintaining the maximum CFM and ACH of the machine. When the filter element becomes dirty, less air is delivered through the clogged filter media, which will reduce the CFM and ACH levels. When the filter element becomes dirty, less air is delivered through the clogged filter media, reducing the CFM and ACH levels. If the ACH decreases, you may not be able to keep up with the rate of indoor pollutants entering, even if the air purifier is running, the indoor air is still dirty. Regular replacement of the filter element can ensure that the air purifier continues to effectively protect the whole family and maintain long-term stable performance.

In addition,many manufacturers have introduced negative ion air purifiers that never need to replace the filter element. Its working principle is that when the negative ion generator produces'negative ions' and is released into the indoor air, the negative ions contact with the fine dust and particles in the indoor air. It can be charged into larger particles and settle on the ground or surrounding objects, thus reducing the dust in the air. There won't be a lot of dust inside.