Guide to HEPA Filter – What are they and how does it work?

We tend to think that air pollution only occurs outside, but that’s not the case always. You can capture dust, dirt, and contaminated particles even inside your spaces and this is where HEPA filter plays a significant part as an effective filtration system. To learn more about its working procedure and efficiency, continue reading.

HEPA stands for High-Efficiency Particulate Air, explains filters that can capture 99.97% of particles (approx. 0.3 microns). If you’re into air purifiers and vacuums, HEPA filters can be a worthwhile investment for you to capture particle dust and other suspended solids to ensure your filtration system works as smoothly and efficiently as possible.

Indoor air pollution can cause several health-related problems and you can’t rely on the ordinary vacuum cleaner to limit this threat. If you suffer from certain allergies or simply want to breathe clean air, it is ideal to find a reliable HEPA filter manufacturer and supplier to get suitable kinds of high-efficiency filters and prevent contamination.

Planning to invest in HEPA absolute filter? Learn the basics and efficacy of this air filter to make the best selection for your industry.

What is HEPA Filter?

The HEPA filter has a high efficiency at removing at least 99.97% of pollen, mold, dust, bacteria, and other airborne substances with a size of 0.3 microns. It can trap larger and even smaller particles. All such air filters require regular cleaning and replacement to remain in good working condition. 

How Effective are HEPA Filters?

HEPA filters are typically good at capturing 99.97% of contaminated particles, i.e., 0.3 microns. This is as efficient and result-driven as air filter gels. If you have serious allergies and need clean air indoors, this air filter can be the best solution for you. It can capture dust mite debris, household dust, bacteria, spores from plants, mold, smoke, and other hazardous particles.

What is so Special About 0.3 microns size?

The HEPA filter is effective against particles of all sizes but the standard is 0.3 microns. It is considered the most penetrating particle size and the most complex particle size to efficiently filter any kind of filter source. So, when setting a filtration standard, it is based upon how well filters can help eliminate the stubborn particles or trap 0.3 microns particle.

How does HEPA Filter Work at Capturing Particles?

HEPA filter media is usually a non-woven fiber. Sometimes, it is synthetic or ceramic in nature while made from glass fiber, and sheets of non-woven fiber can trap particles in four ways:

• Impaction – Since air flows through a filter media, larger particles are quite heavy that while the air changes and flows around the fiber, heavy particles push them forward and stick to filter media.

• Diffusion – Smaller particles are very light that they don’t actually flow with the air and instead, diffuse through the air, which impacts the fiber and becomes trapped.

• Interception – Particles that are not heavy enough but not so light to diffuse, mid-range particles follow the air stream and get trapped when they touch the fiber.

• Sieving – This happens when fibers are closely spaced and particles cannot fit through the air space. It works great when particles are about 1 micron and larger.

Conclusion:

The complete effect of four methods of air filtration explains the high filtration of microparticles, even at the weakest point, the HEPA filter can capture 99.97% of airborne particles. These air filters can protect you and the environmental damage caused by hazardous substances such as microorganisms, allergens, and particulate.

It is an extremely useful and important component in factories and workplaces, especially in areas where dust is produced at a large scale in the manufacturing process.

About the Author:

Industrial and commercial air filter manufacturer and supplier based in China offering HEPA filters, paint booth filters, HVAC filters, filters for a ventilation system, and more. The company serves air filtration systems for many industries, including food and beverage, public buildings, bio and pharmaceutical companies, etc.