Air Purifier Technology

Air Purifier Technology

Home air purifier told you what is HVAC?

It is a common misconception to consider the air filter inside a home’s heating, ventilation and air conditioning system (also known as an HVAC) to be the most affordable and effective way of filtering your air. HVAC filters provide minimal filtration of airbone particles and deliver the air in a dispersed manner at a relatively slow rate. For maximum performance of your home HVAC system and to maintain energy efficiency levels, you should replace your filter at least every three months.

HVAC filters come in different MERV ratings. A higher MERV rating means a tighter weave, which removes smaller airborne particles than a filter with a loose weave. However, a higher MERV rating also means the filter creates more resistance to the air flowing through. This can cause more wear on your HVAC’s motor and yield higher energy costs.

 

HVAC vs HEPA

Even with high quality HVAC filters and frequent filter changes, HVAC air filters are made to trap only large particles in the air, missing small particles and not truly cleaning the air. In addition, since an HVAC system home air purifier delivers either warm or cool air to your home, it is primarily designed to regulate airflow and temperature, rather than to filter airborne particles out of the air. A free-standing air purifier is capable of targeting smaller particles, and an air purifier with a HEPA filter will remove up to 99.97% of allergens, including dust and mold particles. An air purifier can also be used to target specific concerns or specific areas of your home where allergens and other particles are more prevalent, like living rooms and bedrooms.

Home air purifier why use hepa filter?

Guangzhou Olansi has conducted testing and research on several models of home air purifiers and filters, using a specialty laser particle counter to measure the percentage of particles removed from the air. Here are the key fact you need to know about HEPA technology and its use in air purifier and HVAC filters.

Why HEPA?

High-Efficiency Particulate Air (HEPA) Filters are proven to be the most trusted filter technology on the market. The key to HEPA Filters is its tightly woven composition, making them an effective and safe solution to remove airborne particles that can aggravate:

  • Allergies
  • Athma attacks
  • Chemical sensitivity
  • Settling dust
  • Mold growth
  • Pet-related allergies and odor
  • Smoke odor
  • Illnesses linked to viruses & bacteria
  • Long term respiratory health problems

    How does HEPA work?

    HEPA Material

    HEPA is a flat, pleated sheet composed of millions of microscopic fiberglass threads, forming a complex maze which traps airborne particles.

    Because particles 0.3 microns are the weakest point of the filter’s performance, a filter is only classified as HEPA if it removes 99.97% of particles that are 0.3 microns.

     

    Three types of capture

    Interception

    As particles flow by, they are attracted and stick to nearby HEPA filter fibers.

    Impaction

    Air flows smoothly around filter fibers, but particles collide and get embedded.

    Diffusion

    Microscopic particles move erratically, increasing the likelihood of being captured by interception or impaction.

     

     

    How does HEPA compare to HVAC filtration?

    HEPA filters have the highest level of filtering available. Most home HVAC systems are not designed to handle the strain of the high resistance filtering of a HEPA filter, so an HVAC filter with a tight weave may reduce air flow and ultimately lower air quality. HVAC filters come in different MERV ratings,but even the most efficient MERV-rated HVAC filter is less efficient than an HEPA air purifier. If HEPA filtration is required, we recommend an air purifier.

What is an air purifier?

All home air purifiers are designed to help eliminate free flowing particles in the air. Although these particles are not visible to the human eye, they can trigger health problems like allergies, asthma, chemical sensitivity, headaches, and fatigue.

Air purifiers may be filter or filterless, with filterless air purifiers typically requiring less maintenance but also providing less effective filtration. Types of filterless air purifiers include electrostatic air purifiers and ionizers.

Air purifiers that use filters typically work by using a fan to pull air through a filter which is designed to capture airborne particles. The effectiveness of the air purifier depends on both the strength of the fan and the quality of the filter. The most effective filter material is HEPA (High-Efficiency Particulate Air), which removes 99.97% of particles that are 0.3 microns or larger. Complimentary technology used in the filter or unit may target specific airborne particles such as smoke, mold, or odor.

Types of Air Purifier

Type Description Effectiveness
HEPA (High-Efficiency Particulate Air) High efficiency HEPA air purifiers effectively capture airborne particles. The percent of particles captured is the highest of any air purification technology available.

High

Removes up to 99.97% of particles like dust, pollen, pet dander, mold spores and more.

Electrostatic Precipitator Particles are charged and then stick to oppositely charged metal plates within the air purifier.

Minimal

Does a poor job at circulating air. Requires frequent cleaning of the plates to maintain efficiency.

Ozone Generator Not safe and effective at removing pollutants. By design, they produce ozone, a lung irritant that can cause adverse health effects.

Harmful

Does not remove particles in the air. Ozone worsens air quality and can cause damage to lungs when inhaled.

Complementary Technology

Activated Carbon

Effective at removing unpleasant odors, gases, and chemicals in the air. Particles become attracted to, and then trapped within tiny pores in the activated carbon.

Good for: Odor, Gases, Chemicals

UV Light

Kills airborne germs, bacteria and viruses by damaging the bacteria and viruses’ DNA & molecular structure.

Good for: Bacteria, Viruses

Silver Ion Microbial Prevention Filter

Silver-infused filters capture and kill airborne microbes. Silver is naturally anti-bacterial.

Good for: Microbes, Bacteria, Viruses

Ionizer

Helps remove pollen, bacteria, odors, and chemicals in the air. An ionic-only unit provides inadequate filtration. Ionizers are added to HEPA units to improve their performance but should not be used as the sole method of filtration.

Good for: Pollen, Bacteria, Odor, Chemicals

Photo-Catalytic Oxidation (PCO)

Destroys gaseous pollutants by converting them into harmless products by the use of UV light and a catalyst (Titanium Oxide).

Good for: Gases

Pre-Filter

Captures large particles (hair, large dust particles) to extend the life of your air purifier filter.

Good for: Hair, Pet Fur, Large dust particles

Molecular Conversion Powder

Destroys tough odors like tobacco smoke at a molecular level, leaving the air smelling fresh and pure.

Good for: Smoke Heavy Odor

Thermodynamic Sterilizing System (TSS)

Destroys 99.9% of living microorganisms and proteins by exposing them to temperatures above 200 C (approx. 400F). Not available in conjunction with HEPA filtration.

Good for: Bacteria, Viruses, Mold

What to Consider When Buying an Air Purifier

  • Concern or target contaminent
  • Coverage Area
  • Efficiency
  • Style
  • Volume
  • Special Features
  • Cost, frequency and availbility of filter replacements
  • Energy Efficiency
  • Warranty and Service

How to maintain air purifier?

The pre-filter (typically back cover) after using for a long time, will gather some of the dust, thus affect air inlet and air purification effect. Therefore, need to use a vacuum cleaner to suck away the dust, or use a rag to clean up, or even water to wash.
The filters,some of the filters need to be periodically exposed under sun to better maintain the purification efficiency, such as activated carbon filters.
Deodorizing filter, some brands’ odor removal filter can be water washed. Can maintain longer filter lift time by washing filters with water.

The ion generator, generally it is built-in, does not require cleaning, ion generator with good quality can , it’s efficiency are high.
4. Air purifier dust filter dust collection plates need regular cleaning, general cleaning once a week. Wash dust filter or collection plates with soap, install it after they are dry to keep the airflow smooth and sanitation.

Need to clean fan or electrode when they accumulate certain amount of dust. General maintenance every six months. Use long-haired brush to remove dust on fan or electrodes. When the air purifier is not in use, should clean it and then packed into the box, stored in a ventilated, dry place. Usually should pay attention to moisture, so as not to reduce the efficiency due to damp or damaged.