Find the Perfect Purifier Power for Your Room
Buying an air purifier can be confusing. An underpowered unit won’t work, and an overpowered one is a waste of electricity. I created this tool to give you the exact CADR (Clean Air Delivery Rate) you need for your specific room.
How This Tool Works
Using this tool is simple:
- Enter your room’s dimensions.
- Select your main air quality concern (e.g., dust, allergies, or smoke).
- Get your instant recommendation for the minimum CADR you need.
Calculate Your Recommended CADR
CADR Calculator
For Standard Allergies & Pets, you need:
Why the ‘CADR’ Number is Your Best Friend
CADR is the true measure of a purifier’s power. It tells you how much clean air it delivers per minute. The rule is simple: a higher CADR means faster cleaning. This tool finds the perfect CADR for your needs.
Understanding Air Quality Needs
Required CADR = (Room Volume × Desired ACH) / 60
General (Target: 2 ACH)
Good for basic air freshness and light dust removal.
Mild Allergy (Target: 4 ACH)
Recommended for those with mild seasonal allergies.
Standard (Target: 5 ACH)
The AHAM Recommended level for controlling common allergies, pet dander, and mold.
Severe Allergy (Target: 6 ACH)
For individuals with stronger sensitivities or high-pollen areas.
Smoke & VOCs (Target: 8+ ACH)
Critical for spaces with smoke, chemical fumes, or wildfire concerns.