1. Quantity range

Air volume range: 150～5000 m3/h, (assisted fan suction).

2. Air volume measurement 

requirements

±2％；

3. Ambient temperature 

control

Temperature 25℃±2℃, accuracy≤0.5℃; Humidity: 50%±10%,; The test 

piece or material should specify that the resistance at the surface wind 

speed or the oncoming wind speed should be less than the nominal value 

(according to user requirements, options, optional items)).The maximum 

size of the tested piece (tested air air purifier): less than 800mm × 

800mm × 300mm, when the test purifier cross section is different, use 

different connecting flanges to change its diameter.

4. Piece under test: pipeline 

purifier

Test method:
4.1 Put the piece to be tested into the test section, control the temperature 

in the test chamber to be 25℃±2℃, and the humidity to be 50%±10% 

(according to user requirements).

4.2 Detection method of solid dust particles (with standard cigarette smoke 

as the dust source of solid pollutants): Put a certain concentration of particles 

at the upstream end of the test section, use smoke or potassium chloride as 

the dust source, and control the initial concentration of pollutants in the 

upstream end within the set range.Solid pollutants are expressed as the total 

number of particles of 0.3um or more, and the initial concentration at the 

upstream end is compared with the concentration attenuated at the downstream 

end to obtain the purification efficiency of the air purifier's smoke or dust in one 

pass;