What is Air Purifier CADR Rating & How To Measure in 2022

Air Purifier CADR Rating stands for Clean Air Delivery Rate and is a rating that tells you the volume of filtered air (in cubic feet per minute) that a particular air purifier can deliver to the room. The higher the CADR number, the more efficiently the unit filters the air. The Association of Home Appliance Manufacturers (AHAM) provides independent certification of CADR ratings.

In general, you’ll want to choose an air purifier with a CADR rating that’s appropriate for the size of your room.

For example, if you have a small room (up to 300 square feet), you’ll want an air purifier with a CADR rating of at least 100.

If you have a medium-sized room (up to 600 square feet), you’ll want an air purifier with a CADR rating of at least 200.

And if you have a large room (up to 1,000 square feet), you’ll want an air purifier with a CADR rating of at least 400.

Keep in mind that the higher the CADR rating, the more expensive the unit will be. So it’s important to strike a balance between cost and efficiency when choosing an air purifier for your home.

What is a good Air Purifier CADR Rating?

The higher the CADR number, the more efficiently the unit filters the air. The Association of Home Appliance Manufacturers (AHAM) provides independent certification of CADR ratings.

In general, you’ll want to choose an air purifier with a CADR rating that’s appropriate for the size of your room.

How to measure The CADR Rating of an Air Purifier?

To measure the CADR rating of an air purifier, you’ll need to use a special tool called a particle counter. This device will help you to determine the number of particles in the air before and after the purifier is turned on.

Once you have the before and after readings, you can calculate the CADR rating by subtracting the “after” reading from the “before” reading. This will give you the total number of particles that were removed from the air by the purifier.

The Association of Home Appliance Manufacturers (AHAM) has set standards for how many particles must be removed in order to achieve certain CADR ratings.

For example, an air purifier with a CADR rating of 100 must remove at least 99% of the particles in the air.

An air purifier with a CADR rating of 200 must remove at least 99.97% of the particles in the air.

And an air purifier with a CADR rating of 400 must remove at least 99.99% of the particles in the air.

Why is the CADR Rating Important?

The CADR rating is important because it tells you how well an air purifier can remove specific types of pollutants from the air.

There are three main types of pollutants that air purifiers are designed to remove: smoke, dust, and pollen.

  1. The smoke category includes things like cigarette smoke, wood smoke, and fire smoke.
  2. The dust category includes things like dust mites, pet dander, and mold spores.
  3. And the pollen category includes things like tree pollen, grass pollen, and ragweed pollen.

Each type of pollutant is measured in a different unit of measurement (smoke in particulates/ml, dust in grains/m3, and pollen in particles/m3), so the CADR rating gives you a way to compare the efficiency of different air purifiers.

Not all air purifiers are created equal, so it’s important to choose one that has a high CADR rating for the specific type of pollutant that you’re trying to remove.

What is the CADR of Dyson air purifiers?

The CADR of a Dyson air purifier is 350, which means that it can remove up to 99.9% of the particles in the air. The unit is also AHAM certified, so you can be sure that it meets the standards set by the Association of Home Appliance Manufacturers.

Benefits of CADR Rating:

The CADR rating is important because it tells you how well an air purifier can remove specific types of pollutants from the air. This is important because not all air purifiers are created equal, and some are better than others at removing certain types of pollutants.

The CADR rating is especially important for people who suffer from allergies or asthma, as it can help them to choose an air purifier that will be most effective at removing the allergens that trigger their symptoms.

People who live in areas with a lot of smog or pollution may also want to choose an air purifier with a high CADR rating, as this will help to remove more of the harmful particles from the air.

Ultimately, the CADR rating is a valuable tool that can help you to choose an air purifier that will best suit your needs.

Which air purifier has the highest CADR rating?

The Blueair Classic 680i air purifier has the highest CADR rating of any air purifier on the market, with a rating of 400. This means that it can remove up to 99.99% of the particles in the air, making it an excellent choice for people who suffer from allergies or asthma.

CADR vs CFM

CADR and CFM are two different ways of measuring the efficiency of an air purifier. CADR measures the amount of particulate matter that is removed from the air, while CFM measures the amount of air that is moved through the unit.

Most experts agree that CADR is a more accurate way to measure the efficiency of an air purifier, so it’s generally a good idea to choose a unit with a high CADR rating. However, CFM can be helpful in certain situations, so it’s not necessarily a bad thing to look at both ratings when you’re shopping for an air purifier.

Back to top button