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Check out the advantages and disadvantages of the Ozone Air Cleaner .
When Choosing an Air Purifier, their are principally two generic types of air purifiers you need to evaluate. Whether you want an integrated system installed with your HVAC or whether to have a more portable device that you can move into the location you want to clean.
An Air Purifier as Your Best Health Insurance?
It’s easy to see how the services of an air purifier can improve your quality of life by alleviating the particles that are the source of allergy and allergy related symptoms.(5th November 2006)
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Clean Air Delivery Rate (CADR) – a somewhat useful calibration
Association of Home Appliance Manufacturers Calibration system
The Association of Home Appliance Manufacturers (AHAM) is an NGO and a non-profit trade association that represents manufacturers of home appliances such as air purifiers. There is presently no standardized calibration for air cleaning systems, although AHAM has put forward their measuring system as a practical way of comparing one aspect of performance of Portable air purifying machines. This is called the Clean Air Delivery Rate (CADR). As its name implies, this is a measurement of the cubic feet of air that passes through the cleaning system each minute and expresses this as a number for comparison.
CADR does not necessarily reflect effectiveness of filtering particles such as the percentage amount and size of particles removed. It is a measurement of quantity, not quality - Air purifier manufacturers can volunteer to have their appliances rated and published by the Association of Home Appliance Manufacturers which of course does give more credence to the association and their genuine attempts of standardization. One might want to reflect on the fact that a faster flow of air could well be an indication of highly efficient technique, though some people may well bandy about that higher airflows can also be achieved through inferior filtering media.
It would be incorrect to think that any manufacturer not listed by the AHAM was therefore not worth considering. (That’s a triple negative!) So – you presently should still consider and compare all companies, whether they are on the Association of Home Appliance Manufacturers published list or not.
American National Standards Institute (ANSI) Approval
In January 2006, AHAM received approval by the American National Standards Institute (ANSI) for their method of Sound Testing of Portable Household Electric Room Air Cleaners, as a new American National Standard. Useful as this may be, it is again a procedure that manufacturers can volunteer to opt in to if they so wish. Since sound levels do hold more significance to customers, it may be that more companies will join this association.
You can find more information at their site: http://www.aham.org