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Different Types of Air Filters Explained

If you desire better indoor air quality, then you need a quality air purifier. Air purifiers reduce the airborne allergens that aggravate asthma and allergies. As dirty, polluted air flows through the air purifier, clean, fresh air flows into your dwelling. The type of air filter in an air purifier determines how the air purifier operates – and how well it functions.
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HEPA Filters

HEPA air filters set the standard for air cleaners today. From the 1940s, the U.S. Atomic Energy Commission developed HEPA (High Energy Particulate Air) filters in an effort to filter radioactive contaminants. To be classified as a HEPA filter, it must capture a minimum of 99.97% of pollutants in 0.3 microns.

HEPA filter captures particles 25-50 times bigger than the eye can see. The ultra-fine fibers in HEPA filters catch microscopic particles through a combination of diffusion, interception, and inertial impaction. With bigger particles, diffusion occurs when the random motion of these particles causes them to collide with fibers. Interception occurs when larger particles directly float with a fiber. When a particle’s inertia leads to its collision with a fiber, this is known as inertial impaction.

HEGA Filters

You might have also heard of HEGA or High Efficiency Gas Adsorber filters. Specific to Austin Air, HEGA filters have to demonstrate a minimum efficacy of 99.9 percent, per criteria of the Institute of Environmental Sciences, and utilize “adsorber” filter to filter out chemicals, gases, and odors.

Adsorber filter combines carbon or carbon carbon/zeolite pellets into a carbon cloth filter to trap gaseous particles. Particular to the HEGA filter, the adsorber filtration system must be designed, built, filled and packed to adhere to these particular standards. The HEGA air filter should also remove irritants like dust, pollen, mold spores, bacteria, and pet dander to be regarded as a HEGA filter.

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The Austin Air Allergy Machine Series include HEGA filtration. Austin Air discovered and developed the brand new HEGA technology, which entails weaving carbon into a lightweight cloth. The Austin Air Allergy Machine is the ideal air purifier for somebody who wishes to remove gases, vapors, and odors in addition to allergens and other particulate matter.

Activated Carbon Filters

Activated carbon filters remove gases, odors, and chemical toxins. Carbon, or activated charcoal, is treated with oxygen to open up the millions of tiny pores between the electrons.

The activated charcoal adsorbs odorous compounds from gases or liquids. The expression “adsorbing” describes the manner by which the pollutants connect to the charcoal by chemical attraction. The large surface area of the activated charcoal provides it thousands of pores for trapping pollutants. As compounds and pollutants pass the carbon surface, they are immediately attracted and captured inside the filter.

Some carbon filters are treated with additional compounds like potassium iodide or potassium permanganate which boost the carbon filter’s ability to catch Volatile Organic Compounds (VOCs) and other chemically reactive gases. Activated carbon filters adsorb a larger spectrum of contaminants.

AllerAir air purifiers use an activated carbon filtration system to effectively clean indoor air. AllerAir versions include a cylindrical shape for optimum air flow, an effective four-stage filtration system, plus a quiet fan.

Electrostatic Filters

Like Activated Carbon filters, Electrostatic filters bring pollutants. Rather than carbon, Electrostatic filters use electrostatic fees to clean the air. Electrostatic charges are created by pushing air through a maze of static vulnerable fibers. As airborne particles move past the static vulnerable fibers, they become drawn to the static charge and are recorded inside the filter. The particles remain on collector plates until they are hand washed or removed by a HEPA vacuum cleaner.

By utilizing static electricity, you never have to worry about replacing the filters, as most electrostatic air cleaners utilize collection plates to catch pollutants and can be cleaned easily. On the other hand, the collection plates must be cleaned regularly to ensure effective air cleaning. Also, unlike HEPA filters, a few electrostatic filters emit ozone, a harmful lung irritant that may trigger asthma and allergy symptoms, as well as other respiratory issues.

Procuring an air cleaner that does not emit any ozone increases the amount of truly clean air in your property. Friedrich air purifiers have the very best electrostatic filter in the marketplace and emit minimal amounts of ozone.

Charged Media Filters

Charged media filters additionally utilize electrostatic energy. Made from synthetic fibers, the press filter is billed via the manufacturing process and retains the charge during its usage. This cost attracts airborne particles, providing them an electrostatic charge prior to trapping them within the fibers of a traditional filter.

Social media filters present comparatively low energy prices and are really efficient. However, because the filter becomes bloated, it becomes resistant to the airflow, which makes it less efficient the more soiled it’s. Therefore, charged media filters have to be changed regularly for peak performance.

Charged media air cleaners are known for their energy-efficiency and quietnessnonetheless, some of them might emit ozone. Blueair air purifiers use the best charged media filtration, do not emit ozone, and therefore are extremely quiet and efficient.

Hybrid Air Filtration Systems

The Hybrid air filtration system maximizes its effectiveness through the use of numerous technologies. Hybrid air purifiers utilize a mix of filtration methods, each filter comprising to the overall effective quality of the air purifier. Most effective air purifiers a use combinations of the filters listed above.

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