Both the Honeywell QuietCare and Enviracaire Air Purifiers use two air filters, a True HEPA filter that removes at least 99.97% of common household particles as small as 0.3 microns and a Pre-filter that traps large air particles.

Fortunately, Honeywell air purifiers contain a permanent HEPA filter which never needs replacing. Just vacuum twice a year! The Pre-filter will last an average of three months for both Honeywell Enviracaire and Quietcare air purifiers.

The HEPA filter is designed to be vacuumed twice a year and reused. The pre-filter, however, cannot be washed and reused. Once the Honeywell Intelli-Check Monitoring System displays a dirty pre-filter warning, the Pre-filter must be replaced.

The Honeywell QuietCare and Enviracaire air purifiers offer energy-saving programmable controls which allow you to preset the unit to shut-off when you are away and turn on at certain times. This feature minimizes energy consumption and saves you money on your utility bills.

All Honeywell air purifiers are extremely quiet. The QuietCare air purifier offers patented sound-reducing technology which provides ultra-quiet operation. With a specially designed fan blade, a rubber isolated motor mount, padded feet, and added insulation, the Honeywell QuietCare air purifier is both quiet and efficient.

The 200 series Blueair air purifiers use one HEPASilent filter that traps airborne particles like dust, pollen, bacteria, animal dander, and mold spores, while the models above the 200 series use three HEPASilent filters for improved air purification. Optional Smokestop filters (with a layer of activated carbon) remove odors, fumes, and gaseous pollutants. The Blueair AirPod uses one HEPASilent filter that does not contain activated carbon.

Kronos™ air purifiers provide HEPA quality filtration without a filter. In comparison to standard HEPA filters, Kronos™ air purifiers provide better air filtration - a Kronos™ consumer air purifier will remove 99.97% of 0.1 micron size particulates and 99.995% of 0.3 micron size particles (compared with a standard HEPA filter which only removes 99.97% 0.3 micron size particles).

The Intelli-Check Filter Monitor serves as a convenient guideline for replacement of the pre-filter. Based on the Honeywell air purifier's hours of use and operating speed, the Intelli-Check Monitoring system will alert you when it's time for a new filter. Each filter bar will fill up from clean to dirty. Once the bar is completely full, it's time to replace the filter.

The Honeywell QuietCare and Enviracaire air purifiers both come with a five year limited warranty. This limited warranty covers repair or replacement of the unit if found to be defective in material or workmanship, within five years of the date of purchase. Be sure to fill out and return your warranty card within ten days of your Honeywell air purifier purchase to activate your warranty.

The Honeywell Quietcare and Enviracaire air purifiers contain a HEPA (High Efficiency Particulate Air) filter that is guaranteed to remove 99.97% of all particles as small as 0.3 microns from passing air. The HEPA filter and Pre-filter work together to remove particles like pollen, dust, tobacco smoke, animal dander, germs, bacteria, and mold spores with 100% efficiency.

No, neither the Honeywell Enviracare nor the QuietCare air purifiers produce ozone. Ozone is a powerful lung irritant produced by some air purifiers. But Honeywell air purifiers do not produce or emit any ozone, which will ensure that your air stays fresh and clean.

All Honeywell air purifiers not only come with a permanent True HEPA filter, but also include a remote control for easy programming, an Intelli-Check Monitoring System, and patented SurroundSeal technology which helps to minimize air leaks and ensure that the air passing through the Honeywell air purifiers passes through all of the filters.

Biozone? Air Purifiers clean the air in 2 ways, inside and outside of the unit. Air inside the purification chamber is exposed to intense germicidal UV (UVGI) light that produces a purifying plasma. This destroys bacteria, fungi, viruses, and other pollutants (including unpleasant odors). This 'ultra-pure' air then carries the purifying plasma and its purifying results to the air and surfaces throughout your home or office.

Ionic air purifiers attach an electrical charge to the air that passes through the air purifier. This charge, usually a negative charge, then attracts positively charged particles that are floating in the air. This process "weighs down" the particles so that they sink out of the air. Ionic air purifiers are very effective when used in combination with a HEPA air filter. Many times you do not know the nit is working until you change the filter and notice how dirty it is.

Use your Honeywell QuietCare or Enviracare Air Purifier anywhere you need fresh, clean air. You can use it in the bathroom, kitchen, bedroom, basement, or family room. If you plan to use your Honeywell air purifier on light-colored carpeting, be sure to place a small mat or rug beneath it to prevent possible carpet stains.

Any Honeywell air purifier can be used by allergy and asthma sufferers to guard against unseen airborne allergens. You can also use the Honeywell QuietCare or the Enviracaire air purifier if you want to protect yourself and your family against the unseen airborne pollutants in your home.

Virtually all apartments provide air filters for their tenants. Normally, cost is the primary consideration given to air filters for HVAC systems. As a consequence, you are not likely going to get the best air filtration possible. We recommend you contact the Property Manager and explain your desire to obtain a higher-quality filter in your HVAC system.

Negative ion and ozone air purifiers clean the air inside the same way nature does outside, by emitting the world's most powerful and pure air-cleansing agents: negative ions and moderate amounts of ozone. Click Here for more information on Ionic Air Purifiers, or Click Here to read more about Ozone Air Purifiers.

For optimal performance, we recommend that you change all Blueair air filters every six months. This will guarantee that your Blueair air purifier will continue to work effectively and efficiently to provide you with clean air. Join the Clean Air Club, achoo! ALLERGY's Filter Replacement Program, and you'll receive free reminders when it's time to change your filters.