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Material and maintenance of HEPA filter

2018-09-27

HEPA filter is a high efficiency air filter. The filter is essentially a filter that meets HEPA standards. Because it can effectively adsorb fine particles in the air (especially 0.1 to 0.3 microns) (the adsorption efficiency is more than 99.7%), it is recognized as "indoor PM2.5/0.3 gram". In addition to this, in addition to the adsorption of small particles such as PM2.5/0.3, the HEPA filter can also absorb other various pollutants such as mold, bacteria, viruses, etc., and the effect is also remarkable. In addition, HEPA filters are also suitable for users who are close to dust in their homes or who have “old smokers” in their homes. Their adsorption of dust and smoke is still strong.

What are the materials of the HEPA filter?

At present, HEPA mainly has five kinds of materials on the market, namely meltblown polyester non-woven fabric and meltblown glass fiber, PP filter paper, glass fiber and composite PP PET filter paper. Although the material is different, it has a common point: large dust holding capacity, large wind resistance and high filtration precision.

What are the levels of HEPA filters?

HEPA filters can be roughly divided into three levels: high, medium and low. Each level has its own advantages and has its own shortcomings. First, the high-grade HEPA filter is exemplified by H13 and above. Although it can efficiently filter out more than 99% of the particulate pollutants, it also tends to increase the wind resistance of the air purifier, which directly reduces the purification. Efficiency is not worth the candle. Secondly, the medium and low grade HEPA filter, although it can maintain a stable wind, but it also affects the filtration effect of particles below PM2.5, the same can not be balanced. Even if the two can be balanced, but this increases power consumption, performance will also have mutual constraints. Therefore, no matter which level of HEPA filter has its own drawbacks, in order to avoid these drawbacks, it is necessary to choose a comprehensive balance of performance, which is more practical.

How to maintain HEPA filter?

First of all, HEPA filters are best not to be washed without special instructions, because water can easily damage the material. Secondly, because the HEPA filter can easily reach the saturation point of adsorption during a certain period of time (especially in the case of continuous operation in the smog and severely affected areas), if it is not replaced at this time, it will easily cause leakage of pollutants, which in turn will cause two. Secondary pollution. HEPA filters are necessary (the replacement cycle is best at 6 months, depending on the frequency of use of the filter system and the filter changes).

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