Three indicators for air purifier CADR

  • 2022-06-10
  • 327

The purification efficiency (CADR) value has three indicators:

1. Solid particulate matter, also known as dust (Particle), is usually simulated by cigarettes in China, so it is also called soot

2. Volatile organic compounds (VOCs), usually toluene is used as a test source

3. Formaldehyde, because the general air purifier has a very obvious removal effect on dust, but the removal effect of volatile organic compounds and formaldehyde is not as good as dust.

Second, the layout of the room should be integrately considered to be well matched with air purifier

In markets, There is a 360-degree annular design for wind inlet and outlet of air purifier and aso a one-way wind inlet and outlet . 

Since the room layout will affect the effect of purification, if you want to achieve randomness in product placement, you should choose a product with a circular air inlet and outlet design.

Generally speaking, physical purification is the most common and effective method.

For example, large particulate matter such as dust, pollen, allergens, viruses, etc., can be filtered by HEPA technology in the physical purification method; while harmful substances such as benzene, toluene, formaldehyde and other odors can be absorbed by activated carbon in the physical purification method to purify.

HEPA filter is a processable dry high-efficiency air filter. There are many kinds of materials that make up HEPA, which can be divided into PP (polypropylene) high-efficiency filter paper, PET filter paper, PP and PET composite high-efficiency filter paper and glass fiber high-efficiency filter paper.

Among them, PP (polypropylene) is paper, so it is generally not washable. Another part of the HEPA filter is made of PET or PTFE, which is the origin of many claims on the Internet that the HEPA filter is washed with water, but the efficiency of PET is very low.

HEPA is mainly used for capturing particulate dust and various suspended solids below 0.5um.

Using ultra-fine glass fiber paper as filter material, offset paper, aluminum film and other materials as dividing plate, glued with wooden frame aluminum alloy, made of special silicone rubber, odorless, the surface will not harden, and it will not cracks with a long time , stable chemical properties, corrosion resistance, can absorb the stress generated by thermal expansion and contraction without cracking, moderate hardness and good elastic recovery.

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