Cadr Air Purifier Rating

The association of home appliance manufacturers aham seal usually found on the back of an air cleaner s box will list three cadr numbers one for tobacco smoke one for pollen and one for dust the cadr number indicates volume of filtered air delivered by an air cleaner.

Cadr air purifier rating.

The cadr scale goes up to 400 450 depending on the particle size measured. So how does this translate. The air purifier has a tobacco smoke cadr rating of 300 cfm. The higher the tobacco smoke pollen and dust numbers the faster the unit filters the air.

The cadr rating reflects the volume of air in cfm cubic feet per minute that is cleaned of particles of certain sizes. This is the clean air delivery rate and we explain the cadr rating here. Cadr stands for clean air delivery rate and is one of the most important ratings that you must check when considering an air purifier. Clean air delivery rate cadr is a figure of merit that is the cubic feet per minute cfm of air that has had all the particles of a given size distribution removed.

This means that the air doctor purifier can clean the air three times per hour in a room up to 900 sq. Cadr the clean air delivery rate is a metric that was developed as a way of measuring the performance of residential air purifiers. Dust cadr can be as high as 400 and the pollen cadr and smoke cadr can be as high as 450. It is mainly used to determine room size coverage of the air purifier.

On that page we explain how to make sure an air purifier can fully clean the square footage of your room or home. The air doctor purifier has a decent ach rating of 3x ach. Aham suggested room size for this air purifier is 465 square feet where you will get 5 air changes per hour. The rule of thumb to keep in mind is that the cadr ratings of the air purifier you are considering must be atleast 2 3 of the area of your room when measured in square feet.

Honeywell air purifiers get decent reviews across the board and the hpa300 is a good unit for a fairly reasonable price. Air changes per hour or ach indicates how many times per hour an air purifier can exchange the full volume of air inside a room. Official air purifiers guide learn why some air purifiers work and some don t. It has among the highest cadr ratings for smoke dust and pollen of the.

In the us cadr is measured in cfm cubic feet per minute. The cadr rating is meant to be a standard represented by a numerical value that allows consumers to measure the effectiveness of stand alone air purifiers cadr ratings are not used for whole house systems. The high airflow rate is capable of cleaning a 775 square feet of rooms three times an hour.