Nowadays, you need to realize that the level of air pollution is getting worse. Not only outdoors, but air pollution can occur indoors. This may be surprising for most people, but for those who live in big cities. They already feel air pollution in the room, such as an increase in the amount of dust, black smoke, and bad odor.
Of course, air pollution affects our health. Various diseases have been lurking us, ranging from common diseases like coughing, sneezing to chronic diseases like asthma, or lung cancer. Moreover, for those who have allergies to dirty air. Surely they suffer more because of it.
One sure way to deal with air pollution in your home is to run an air purifier equipped with a HEPA air purifier.
What is a HEPA filter?
HEPA stands for high-efficiency particulate absorber. A kind of air filter.
The working principle of a HEPA air filter is at first glance similar to a gauze, where it captures large particles and allows smaller ones to pass.
On the inside of the filter there is a folded paper-like membrane made of fiberglass and has a very small diameter size. Unlike the gauze, this membrane is specially designed to capture airborne particles in the following ways:
Where the air particles move in the direction of the air flow and then attached to the fiber
Where larger air particles can not escape filtration and adhere to one of the fibers.
Is an advanced technique for capturing very small particles that can not be captured by either of the previous filtering methods. Where the dust particles will wander inside the filter before it will eventually stick to the fiber. This method is more dominant at lower airflow velocities.
Types of HEPA filters
If you notice, there are a variety of HEPA air cleanerS available on the market. In order to find the HEPA air purifier that suits your needs, then see the classification of the HEPA filter below:
Based on the efficiency level consisting of 95, 99, and 99.97 percent.
The percent value above illustrates the number of airborne particles that have been captured. The greater the percentage value, the better the filter.
Based on the endurance level consisting of N, R, and P.
The letter N means not resistant to oil, the letter R means resistant to oil and the letter P means oil proof.
So if you find a HEPA filter labeled N95, then that means the filter is not resistant to oil and has a value of 95% filtering efficiency.
There are also HEPA filters sold by label A to E. Based on the level of effectiveness in capturing air particles. Where type A is the lowest or common class and E is the highest class and meets military standards.
True HEPA filter
A True HEPA filter is a filter capable of filtering 99.97 air particles measuring 0.3 micrometers in diameter.
- Able to filter very small air particles up to 0.3 micrometers
- Designed to capture pet dander, pollen, and dust mites
- The filter can not be cleaned and must be replaced with a new one
- Not able to kill viruses, bacteria and mold