CADR
The CADR, or Clean Air Delivery Rate, is a crucial measure for assessing the effectiveness of air purifiers. It indicates the volume of purified air an air purifier can deliver per minute.
Here’s a detailed explanation of its key components:
Air Volume: The CADR measures the volume of air (in cubic feet or cubic meters) that has been effectively cleaned of specific contaminants by the air purifier in one minute.
Types of Contaminants: The CADR is often reported for three common types of pollutants: smoke, dust, and pollen. These pollutants vary in size, allowing for an assessment of the purifier's effectiveness against different particle types.
For instance, a purifier may have a high CADR for dust but a lower CADR for smoke.
Comparing Purifiers: The CADR is useful for comparing the efficiency of different air purifiers. A device with a high CADR cleans the air more quickly than one with a lower CADR. It is calculated by placing an air purifier in a standardized room with a specified concentration of contaminants, then measuring the reduction of these contaminants over a given time.
Room Size Importance: The CADR should be related to the size of the room. A unit with a high CADR may be necessary for large rooms, while a lower CADR may suffice for small rooms.
Limitations: The CADR does not measure the filtration efficiency of gases or odors and does not account for other factors such as overall indoor air quality.
In summary, the CADR is a standardized measure that helps consumers understand and compare the performance of air purifiers regarding their ability to filter specific particles from the air.
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