Understanding CADR for Air Purifiers Ava Montini July 30, 2023

Understanding CADR for Air Purifiers

With the growing concern over indoor air pollution, air purifiers have become an increasingly popular appliance in many homes. However, with so many options on the market, choosing the right air purifier can take time and effort. In addition, consumers are often faced with various specifications, features, and marketing claims, making it difficult to compare different models and determine the best fit for their needs. One key factor that can help differentiate air purifiers and make the decision-making process easier is understanding the Clean Air Delivery Rate (CADR) rating. 

This blog will explore CADR and how it can help you choose the right air purifier for your indoor space.

What is CADR 

Clean Air Delivery Rate, or CADR, is a widely recognized benchmark established by the Association of Home Appliance Manufacturers (AHAM) in the United States. This independent organization certifies and verifies the performance of air purifiers through CADR testing, ensuring that the manufacturer’s claims are accurate. This makes it easier for consumers to identify which air purifiers are the most effective in removing indoor air pollutants like dust, pollen, and smoke.

CADR evaluates the performance of an air purifier based on the amount of clean air it produces per minute and the size of the room it is intended to be used in.

CADR Certification

Air purifiers with an AHAM-verified CADR rating are tested using a standardized method. According to AHAM, a CADR figure is tested through a standardized method in a test chamber with a volume of 1,008 cubic feet. As the tested air purifier runs at full speed, the amount of dust, pollen, and smoke contaminants is continuously monitored. The air purifier’s CADR rating is calculated based on how long a unit takes to purify the air.

Why is CADR important?

The CADR rating is essential in determining an air purifier’s effectiveness. It helps consumers compare the performance of different models and brands, making it easier to find an air purifier that will meet their specific needs. For example, air purifiers with higher CADR ratings will be able to clean the air in a space more quickly than models with a lower CADR rating.

‘The higher the CADR, the better the performance.’

In addition to a CADR rating, here is a short list of the areas we recommend you consider when buying an air purifier:

  • Filter efficiency, size and amount of filter media
  • Noise level
  • Motor quality
  • No ozone 
  • Square Foot Area coverage