An Air Purifiers Ratings will only be of value if you first know:
1) What technology matches your needs (Ionic? HEPA? UV? Carbon?)
2) The value of the models you are reviewing (Consumer reviews, operating cost, filter replacement costs).
3) What square footage you need and
4) All the in's and out's of warranties, and guarantees
To determine the best air purifier - and that is the best based on YOUR NEEDS - my suggestion is to first watch the video below. It explains the 10 air purification technologies available and what they do.
Once you determine which technology matches your need then review the comparison chart (link on the left menu) for models that match. Choose several that match your needs. Then watch the video reviews on each model and the complete written reviews which include particle tests, as well as lists of pros and cons.
1) Video reviews where I take the air purifier apart to show you the filters and technology.
2) Comparison charts - this especially important information because many companies use deceptive warranty policies and have overpriced replacement filters. 3) Particle tests which show which units really remove dust, pollen, and other debris in the air. I haven't found any other site which covers this. (video)
1) Every air purifier covers a different area of square footage, yet many consumers purchase models that are too small or too large.
2) Each of the ten air purification technologies removes something different from the air. For example, many people bought the Oreck Air Purifier for pollen allergies, only to find that it doesn't have a HEPA filter - hence it won't do a very good job on pollen.
3) When the air purifiers ratings come out in consumer reports they fail to include inlcude important factors like replacement filter costs. EX: Buy their best-rated air purifier and you'll be paying $75 every 9 months.
May You Breathe Better,
The Air Purifier expert