For the air purifier, two of the things we've heard a lot about are the CADR rating and the ACH rating. And what's the ranking of CADR? What's the ACH rating? You can ask these questions a lot before you buy any air purifiers, right?

The answer, however, is very simple.

Air purifiers are becoming more and more popular. People who suffer from allergies or asthma will not need to take more pain, as air purifier is one of the best solutions to help prevent allergies and asthma.

As a result, we will see more and more air purifiers used at home and in other public places, such as schools , hospitals or any health services.

So are you ready to find out what the CADR rating is and choose the right air purifier for you? Let us help you.

What's the CADR RATING?

CADR stands for Clean Air Delivery Tariff.

In general, this statistical value will inform you exactly how many of the different particles to be extracted from the air. In other words, the CADR rating indicates how quickly the air purifier can clean the air in a room of a particular size.

For example, an air purifier with a CADR rating of 300 cfm cleans a room of 300 sq ft much faster than an air purifier with a CADR rating of only 200 cfm.

The CADR value is taken in CFM, which stands for cubic feet per minute, or m3 / hour. CADR is typically assessed for pollen, smoke, and dust. Such three contaminants are not only small in size, they are also the most harmful particles in the air.

  • Smoke particles are ultra-fine particles with defined particle sizes ranging from 0.1 to 0.3 microns.
  • Dust particles are small particles with a size between 0.5 and 3 microns.
  • Pollen particles are the large particles you can see with your own eyes, ranging in size from 5 to 11 microns.

The scores of CADR was invented by AHAM (Association of Home Appliance Manufacturers). It is safe to say that the AHAM CADR rating is currently the most accurate measurement.

To make use of the CADR rating, you can look for it whenever you pick up an air purifier. The higher the CADR score, the more powerful this air purifier fan is. 

Expert tips: Remember that the CADR ratings show only the cleaning capacity, not the cleaning capability.

This means that an air purifier with a high CADR rating actually has a high fan power to cover a large size of room. If you want to know the cleaning quality, test the filters and the technology of this air purifier. 

How to know CADR scores?

The CADR scores shall be solely calculated by the ANSI / AHAM AC-1 test.

This test is not so easy to understand, but it's very reliable. The testing agency shall place the air purifier test unit in a chamber with a specified amount of pollutants. After 20 minutes of driving, the air purifier is stopped and the air in this chamber is measured again. Finally, the CADR ratings for this air purifier can be concluded.

Nevertheless, this method has its own limits. CADR scores are used for common pollutants and, in this case, for dust , pollen and smoke. If you need an air purifier for a specific type of virus or bacteria, AHAM's CADR ratings are not useful.

However, the short duration of 20 minutes is a simple limit to this measure, as certain air purifiers work well for the first 20 minutes and then lower the output rating later.

Also, the ionizer is one reason to make CADR ratings inaccurate. Ionization is a method of placing a lot of small particles into larger ones, but not trapping them. Usually, these larger particles are deposited on the floor and wall. After proper treatment, these pollutant particles are able to be in the air again.

Right now, we hope you understand the top of CADR scores. While this measurement is a key factor in choosing the right air purifier, keep in mind that you should also test other specifications.

An expensive air purifier will always be better than a cheap one, even if it has a lower CADR rating. That's mainly because they're using a better performing filtration device.

What is ACH and how is it related to CADR?

ACH stands for Air Changes of the Hour.

The ACH rating indicates how many times an hour an air purifier can exchange air in a room. More fresh air exchange means, in general, improved air quality.

Together with the CADR ratings, the ACH rating shows precisely the strength of this air purifier fan. In short, the 5X ACH air purifier cleans the specific size more than the 2X ACH air purifier.

One of the best ways to save your health is to have an air purifier in your home. Don't hesitate to invest in one, by looking at the best air purifiers on the market. We, at HealthyBreeze, are going to help you in this mission. 

Our friendly and helpful customer service team is always just a phone call, email or quick chat away if you need assistance choosing the correct air purifier for your space and needs. 

At HealthyBreeze, we offer you the best air purifier you can find, from a low-cost alternative to medical-grade air purifiers. To help everyone improve their lives, we're going to offer the most reliable purifiers you can invest in without hesitation.