CADR 2
The CADR, or Clean Air Delivery Rate (Taux de Livraison d'Air Pur), is a measure used to evaluate the efficiency of air purifiers. It indicates the volume of purified air an air purifier can deliver per minute. Here is a more 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: CADR is often provided for three common types of contaminants – smoke, dust, and pollen. These three contaminants vary in size, which allows for evaluating the purifier's efficiency for different types of particles. For example, a purifier may have a high CADR for dust but a lower CADR for smoke.
Use for Comparing Purifiers: The CADR is useful for comparing the efficiency of different air purifiers. A device with a higher CADR cleans the air faster than one with a lower CADR.
Calculating the CADR: It is calculated by placing an air purifier in a standardized room with a specified concentration of contaminants. Then, the reduction of these contaminants is measured over a set period to determine the volume of air cleaned per minute.
Room Size Importance: The CADR should be related to the size of the room where the purifier will be used. A device with a high CADR may be necessary for larger rooms, while a lower CADR might suffice for smaller 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, the presence of volatile contaminants, or the purifier's long-term efficiency.
In summary, CADR is a standardized measure that helps consumers understand and compare the performance of air purifiers regarding the speed at which they can filter specific particles from the air.