Abby's Guide to Air Purifiers
Username Password
Home Discussions Reviews More Guides
Abby’s Guide > Air Purifiers > Guide > Air Purifiers - How is air-cleaning efficiency measured?

How is air-cleaning efficiency measured?



Air cleaning effectiveness is measured by how many and what kind of particles are captured and the amount of air that is purified in a period of time. Filters are tested and given American Society of Heating, Refrigeration, and Air-conditioning Engineers (ASHRAE) ratings.

There are two ratings: 1) Initial Staining Dirt Efficiency, measures how well a filter removes microscopic amounts of staining particles including grease, allergens and tobacco tar. 2) Average Arrestance Test measures the percentage of dust, hair, lint and other large particles in the air are removed.

The Association of Home Appliance Manufacturers or AHAM gives another measurement of efficiency called Clean Air Delivery Rate (CADR). This measures how many cubic feet per minute of air are rid of three different sized particles: minute (smoke), medium (dust), and large (pollen). The higher the rating, the less times that it takes the unit to remove these particles. The only units marked with this CADR rating will be those approved by the AHAM.

Popular Products
Manufacturer/Model
1. Hamilton Beach 04161 TrueAir
2. Hamilton Beach TrueAir 04381
3. Honeywell HFD-130 Germicidal Tower
4. Honeywell 50250
5. Sharper Image Ionic Breeze 3
6. Honeywell 50250 Pure HEPA
7. Honeywell HHT-011 Compact Air Purifier
8. Ionic Breeze Quadra Silent Air Purifier SI867
9. Hunter 30090 QuietFlo HEPA
10. Rabbit Air BioGS 421A Ultra Quiet with Germicidal Sterilization
Air Purifiers Guide   •   Discussions  Reviews  
AbbysGuide.com   About Us   Terms of Use   Privacy Policy   Contact Us
Copyright 1998-2024 AbbysGuide.com. All rights reserved.