1.IQAir Health Pro. This air purifier which tops our top ten air purifiers list received the highest rating at Air-Purifiers-America.com and in other reviews. It can filter down to 0.1 micron level size particulates and performs very well on high speed but is a bit noisy. IQAir Health Pro uses hyper HEPA technology and can clean up to a 1,000 square foot room. The Hong Kong Hospital Authority used this purifier during the SARS outbreak. A more expensive unit is the IQAir Health Pro Plus which additionally removes odors.



2.Blueair 601. According to the 2007 Association of Home Appliance Manufacturers (AHAM) Directory of Certified Room Air Cleaners, the Blueair 601 is included in our top ten air purifiers has the fourth-highest clean air delivery rate (CADR) among 40 brands for dust, pollen and smoke removal. It can clean up to a 679 square foot room and has a 10-year warranty. It uses a combination of ionization and HEPA-like filters. Some reviews say that in using this combination technology, Blueair captures a higher percentage of allergens without releasing ozone into the air, like other electrostatic models.

3.Alen A375UV. This is considered the most advanced model under the Alen brand with HEPA filtration, 2 UV lamps for bacterial control, permanent titanium dioxide filter for volatile organic compounds (VOCs) and activated carbon for light odor removal. It is good for use up to 400 square feet.

4.Alen A350. This item was found to be quieter than IQAir Health and can clean from 400 square feet up to 800 square feet. Alen A350 contains one filter catridge that contains the HEPA filter, carbon filter and pre-filter all in one. So the replacement filter costs are less and it costs half as much as Blueair or AlenA375UV.

5.Eco-Rx Master Series RX400. Most reviewers prefer HEPA air purifiers over UV models but Eco-Rx can be comparable to IQAir Health Pro and Blueair models using a different technology. The sealed chamber of the Eco-Rx ensures that incoming air remains in the unit long enough to be decontaminated. It also has a safety shutoff feature to minimize the risk of accidental UV exposure. It covers up to 500 square feet. Like other UV-only purifiers, this model is effective only against biological contaminants.

6.AllerAir. This brand uses five stages of filtration and includes high grade activated carbon for chemical and gas control. AllerAir uses HEPA technology and can remove allergens, odors and cigarette smoke.

7.Austin Air Healthmate. Removes dust, pollen and odors in large rooms. Its pre-filters are washable and can be vacuumed. It employs true HEPA filter and controls mold spores, pollen, pet dander, light tobacco smoke and dust mites.

8.Whirlpool Whispure AP45030S. This model has a pre-filter for odors, a filter change indicator and push button controls. It can clean up to a 500 square foot area. The filter replacement cost can add up the cost though. Its pre-filter has to be replaced every three months and the HEPA filter should be replaced every year.

9.Honeywell Enviracaire 50250. This is one of the least expensive air purifiers to receive good reviews. Honeywell Enviracaire is a circular air purifier that has a pre-filter for odors and a HEPA filter to trap allergens. It is designed for rooms up to 375 square feet. This is a cheaper item than other purifiers but is also noisier.

10.Hamilton Beach TrueAir 04161. This air purifier has a HEPA filter, a carbon pre-filter and UV germicidal light. It can cover up to 200 square feet. The carbon pre-filter absorbs odor and the UV light kills bacteria. It works together with the HEPA filtration to be more effective and has a filter indicator.