Clean Air Delivery Rate (CADR) is a performance indicator scale, which is assigned by the Association of Home Appliance Manufacturers (AHAM). CADR rating measures the efficiency of an air purifier by taking into account the room size and volume of clean air produced per minute by the appliance. CADR rates the removal of pollen, dust and smoke present in the indoor air. The higher is the rate of CADR, the better is the air quality. There are three different CADR ratings provided on the AHAM seal. The ratings of CADR are as follows:
- Tobacco Smoke 10 to 450 CADR
- Dust 10 to 400 CADR
- Pollen 25 to 450 CADR