Clean Air Delivery Rate (CADR): What It Means and Why It Matters for Your Air Purifier

What is CADR?

The Clean Air Delivery Rate (CADR) is a standardized metric developed by the Association of Home Appliance Manufacturers (AHAM). It measures how efficiently an air purifier can remove three common airborne pollutants:

  • Dust (particles like pet dander and allergens)
  • Pollen (seasonal allergens)
  • Tobacco smoke (fine particles and odours)

CADR values are expressed in cubic feet per minute (CFM). The higher the CADR number, the faster the purifier can clean the air in a given room.

Why CADR Matters for Your Indoor Air Quality

  1. Performance Clarity
    CADR cuts through marketing jargon. Instead of vague claims like “powerful filtration,” CADR gives you verified, lab-tested data to compare air purifiers objectively.

  2. Room Size Matching
    CADR helps you choose a purifier suited to your space. For example:

    - A CADR of 200 CFM is ideal for rooms up to 200 sq. ft.

    - Use the formula: Room Size (sq. ft.) = CADR × 1.55


  3. Efficiency in Real Time
    A high CADR means the purifier can quickly reduce pollutant levels, which is critical for allergy sufferers or homes with pets.

How to Use CADR When Buying an Air Purifier

  1. Check AHAM Verification
    Always look for the AHAM Certified® seal, which guarantees the CADR ratings are accurate.

  2. Match CADR to Your Needs

    - High pollen allergies? Prioritise a high pollen CADR.

    - Eliminating odours? Focus on smoke CADR.

  3. Avoid Overpaying
    A CADR higher than your room requires wastes energy and increases noise. Balance performance with practicality.

 

Common CADR Mistakes to Avoid

  • Ignoring Room Size: A purifier with CADR 100 won’t work in a 300 sq. ft. living room.

  • Focusing Only on CADR: Pair CADR with a True HEPA filter and activated carbon for comprehensive air cleaning.
  • Forgetting Noise Levels: High CADR units can be loud. Check decibel ratings for bedrooms.

 

The Bottom Line

CADR is the gold standard for evaluating air purifier performance. By understanding this metric, you can invest in a device that truly improves your indoor air quality—no guesswork required.

Pro Tip: Always cross-reference CADR with real-world reviews and filter replacement costs for the best value!

 

Optimize Your Air Quality Today
Ready to choose the right air purifier? Keep CADR in mind, and you’ll be one step closer to breathing cleaner, healthier air.

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