More air purifier OEM / ODM OEM OEM Advisory: 13,480,217,932 Xu how to judge the quality of the air purifier is good or bad? First look at businesses offer a variety of products certified * and test reports, such reports are authoritative * Certification Center issued a report has some authority. Description of products have professional certification bodies. Second, carefully check whether the product defect from the product's appearance and workmanship, and finally to see the brand as well as information on the package. Product information is essential to improve the quality assurance of the product. If you have time to look at the product and evaluate the customer experience online. Comprehensive Judgement. Air purifier filters can clean it? HEPA filters and other physical filtration filter can not be cleaned, only to be replaced periodically. Some other types of air purifiers filter can be cleaned. Air purifiers process of how to know the air quality is good or bad? General air purifiers work process indicator shows there will be a good work environment and poor quality. Red is the current general environment for the worst, yellow, and green is excellent. Mass air cleaner and also an important indicator of the core, that is CADR value. The quality of the performance of air purifiers, clean air from the main output ratio (CADR value) determined, the clean air output ratio, the higher the purification efficiency of the purifier. For indoor air quality reaches a certain standard of cleanliness, air purifier, there are two necessary mandatory targets. CADR higher the value, the higher the purifying respirator performance.