If you have already read some of my articles and are familiar with my website, then you already know that I have done my best to write air purifier reviews. Also, you should already know that I only write product reviews I consider worth the money. I have done my best and wrote informational articles, so you don`t have to surf the web to find answers to most common questions and basic things about air purifiers. This page will be no different, and I will explain the term CADR.


CADR – What Does It Really Mean?

The term CADR stands for Clean Air Delivery Rate. We use this term to describe an air purifiers capability to filter the air from pollution, which is expressed in cubic feet per minute. Different type of air purifying filters are different, and that also means that CADR ratings will not be the same. Remember that there will always be three figures: one for smoke, for dust, and one for pollen.
With CADR ratings, you can easily tell how efficiently your chosen air purifier will deal with dust, smoke and pollen. For example, if pollen for you is a bigger issue than smoke, then you need to look for an air purifier with higher Pollen CADR rating.


AHAM Certification

aham-certificateWhat is AHAM? The term AHAM is shortened form of Association of Home Appliance Manufacturers. And CADR ratings were developed by this organization. Please notice, that you will never find CADR rating for whole house air purifier, the reason is that whole house air cleaners are measured differently than portable air cleaners. Organizations like the EPA are highly trustable because they very heavily rely on the CADR rating AHAM is giving out.

Specifications to Look Out For

There is the AHAM seal on each air purifier, where you can find CADR ratings for all three categories dust, smoke, and pollen. The higher the rating, the better and more air will be filtered by the air cleaning unit. The CADR rating for smoke always is the first one, it`s because smoke particles are the smallest ones, ranging from 0.09 to 1 micron in diameter.

Rating for dust is the second one, the size varies from 0.5 to 3 microns in diameter. Pollen particle size is the biggest from the three, ranging from 5 to 11 microns in diameter.

One of the best air purifiers for the whole house is IQAir New Edition HealthPro Plus, which all three CADR ratings are the same, 450 for smoke, pollen, and dust.

How to calculate the CADR number you air purifier need, based on AHAM recommendations?

It`s quite easy, just take the dimensions of your room and calculate how much cubic feet there are. Your rooms volume in cubic feet should be equal or smaller than the CADR rating multiplied by 12. Of course, this is the simplest calculation, but I won`t go technical right now because you will get very bored. Also, with this very simple calculation you look at CADR ratings and found if your chosen air cleaner can adequately filter your room.

The Final Word

Yes, I know this might not be the most interesting article. But it is crucial to learn about CADR ratings and how they can help you to choose the best air purifier for your needs. Now you can take CADR ratings and calculate if the air purifier will be adequate for your room. You now know what CADR stands for and what does each number mean. And I’m quite sure you had never heard before about AHAM. I hope you have learned something that will be helpful for you if so be social and share!