Air Filters - Which to Buy and When?


Air Filters - Which to Buy and When?
Best air filters based on noise level, features, and price
by Mercia Tapping, President,

In order to answer this question we need to have a better idea of the problem you are trying to solve but we get numerous questions from people who ask for additional help in making a decision over which machine to purchase. Here is the summary of what I say to people, but if you need additional help please contact toll free directly at 1-888-236-7231.


  • Air Purifiers Overview - view all air purifiers sold by
  • Air Purifiers Comparison Chart - a comparison with pluses and minuses of all the best air purifiers
  • - a quick buyers guide of the best recommended products to solve airborne allergen problems
  • - Editor's top picks on air purifier info

    A. If quietness is a very high priority then there is nothing like air filters. Noise level seems to be very important to people in their bedrooms. Blueair has an excellent number of air changes per hour and easy to change filters. It consumes very little electricity, however the replacement filter cost makes the running costs more than some. The Blueair air filter costs $399 at

    B. IQAir is our second quietest air filtration machine. The IQAir air filter costs $599-$699. For sheer technological superiority in a number of features, the new IQair is pretty awesome. It has filter light change indicators for 3 filters, ability to program the machine to turn itself on before you get home, ability to change filters easily without a screw driver. The electricity consumption costs and filter replacement costs are very moderate. I would recommend this air filter machine for use anywhere in the house and office. The more expensive model deals with gases and viruses and has been used in hospital clean room environment. The IQair also comes with a superlative manual, which definitely wins the award for the best manual. I consider this to be our best overall air filter machine.

    C. The Clarifier air filter, which we have just finished recently testing in our offices, has a superior number of air changes even on low fan speed. It has the additional benefit of ultraviolet which I was doubtful of being of real demonstrated value until I read a new university study last month. It is the first study which shows conclusively that ultraviolet light kills allergens, and in particular, mold. The Clarifier air filter does not win the beauty pageant, is a little on the noisy side especially on high fan speed . You still have to use a Phillips screwdriver to change the filter BUT it does indicate when the filters need changing which I see as a big plus. I would tend to use the Clarifier in basements, home hospital care, daycare centers, and around all circumstances where the elimination of viruses , mold,and odors is important. Stopping of spreading viruses in the office could be helpful in winter. I would also recommend the Clarifier air filter if you have severe asthma and want to play it safe with your air cleaner choice. If you are concerned with all the spraying of chemicals in your area to control the West Nile Virus the Clarifier is an excellent choice. The Clarifier air filter comes with a decent manual to show you how best to use and maintain your machine. The Clarifier Standard air filter is $499 at

    D. For sheer economy, at $400 the Austin Air Healthmate Standard air filter is a cost-effective choice. If you do not have severe allergy problems and the warning lights for new filters is not of major importance to you then the Austin air will do you fine. This is a middle of the road hepa filter without a lot of extra whistle and bells. After having used one for two years I can say it is quieter than most but I now I wonder when I should change the filter. Since the hepa filter supposedly lasts 3 to 5 years I will err on the side of caution and change it after 3 not 5 years, It is just irritating to think I might be changing it before it is necessary. Changing the filter is a bit of a production and the Austin manual is pretty awful(we have to beg Austin to send us manuals to give our customers). BUT I am not going to discard the Austin and when the hepa filter needs to be changed I will take changing it on as a project.