22 used & new from Ships from and sold by Filter Monster. Hunter 30901 Replacement Pre-Filter for HEPAtech Quiet Flo Air Purifiers Hunter 30940 Replacement Filter for HEPAtech and QuietFlo Air Purifiers FREE Shipping. Buy a Used "Hunter 30901 Replacement Pre-Filter for HEPAtech Q..." and save 53% off the $29.99 list price. 11.3 x 10 x 2.5 inches 5.6 ounces (View shipping rates and policies) 4.4 out of 5 stars #54,061 in Home and Kitchen (See Top 100 in Home and Kitchen) #287 in Home & Kitchen > Heating, Cooling & Air Quality > Air Purifiers > Parts & Accessories #2,273 in Home Improvement > Appliances > Large Appliance Accessories See all 160 customer reviews See all 160 customer reviews (newest first) Exactly what I need, fit my unit . both items fine and are working well.I ended up not needing these, but have found way other uses for them like an extra filter for my aquarium. All, I have to do is cut to fit and they work great!

THIS IS THE EXACT SAME PRODUCT THAT THE COMPANY ITSELF SELLS FOR SOOOOO MUCH MORE.WORKS JUST AS WELL, IT'S EXACTLY THE SAME. Trim to fit filter with enough extra for a smaller HEPA filter we have and then some! Inexpensive carbon pre-filter for my HEPA filtration unit Great product and priced right. See and discover other items: air purifier fan, activated charcoal air filterHigh Efficiency Particulate Air (commonly abbreviated as HEPA) filters are an essential component to maintaining an allergen free and healthy home - but how to choose one that really works? picky testing team approves only the best performing HEPA air filters and then provides you with our full ratings and reviews including pluses and minuses for each air filter model. A HEPA filter will remove 99.97% of all particulates (dust, pet hair, pollen, etc.) that are .3 microns are larger. We rate the IQAir as the best all around air filter especially for those with severe allergies; Blueair is superb as a quiet bedroom air filter and inexpensive to run;

Austin Air is a good, economical and durable air filter; AllerAir makes excellent air filters for smoke control or for multiple chemical sensitivities. See our full selection of Hepa air filters below. We offer replacement air filters for most top brands.Abby’s Guide > Air Purifiers > Guide > Air Purifiers - The best air purifiers will help you beat those allergies Why do you need an air purifier? If you or family members have allergies and particles need to be removed from the air consider any of the mechanical or electronic cleaners. HEPA and ULPA filters can remove and collect particles, as do electronic cleaners with filters, but a negative ionizer will only remove the particles from the air. It is then up to you to collect them while cleaning — either vacuuming or dusting. If you would like to remove chemicals, smoke or gases, you will need a carbon air filter because the other types of filters do nothing for these types of contaminates. A carbon air filter will remove odors caused by chemicals, whereas an ozone generator will remove most other odors.

If you have a smoker in the family, or a smelly pet, consider a purifier with an ozone generator included. oransi pro uv air purifierOr, if these odors are all you want removed, maybe all you need is an ozone generator. bionaire air purifier bap600bJust keep in mind that the ozone gives off its own odor so you would like to be able to control the levels of ozone that it emits. vicks nursery true hepa air purifierIf you are looking to destroy viruses, germs, bacteria, and fungi, the UV light is probably the most effective. Although it will not be able to destroy all of these contaminants, it will help to reduce their occurrence in your home's air. Some mechanical filters will have a UV light near the filter to keep the microorganisms trapped there from reproducing.

(This is a good idea) Whatever you are looking for in an air cleaner, the best idea may be to get one with a variety of these components to be most effective. This can run a much higher cost than you might think...Air Purifiers & Filters Hunter Tabletop Air Purifer 2-pack with 2-in-1 Filter Hunter Perma HEPAtech and Eco-Silver Air Purifier Duo Hunter Eco-Silver Perma HEPAtech Air Purifier Hunter Eco-Silver Perma HEPAtech Air Purifier Duo Hunter UVC Bulbs 2-pack for Perma Air Purifier Hunter QuietFlo Replacement Carbon Pre-Filter 2-pack Hunter True HEPA Purifier 2pk Filter Model #30940 Hunter Eco Silver Carbon Filter - 2-pack Hunter Eco Silver Pre-FilterAir purifiers remove allergens, odors, and pollutants from the air. They range in size, function, design and price. With so many options and brands, deciding the best air purifier for your needs can be confusing. We offer the best ozone-free air cleaners that address a wide variety of needs including smoke and odor control, allergy, asthma, multiple chemical sensitivity, and air quality issues like pollution, cigarette smoke, pet dander and dust.

If you are considering your first air purifier, read our Air Purifier Buying Guide for more information. There are many types of air purifier technologies. HEPA filters remove 99.97% of all airborne particulates like pollen, dust, and animal dander. Many of the air cleaners we offer use activated carbon to remove chemicals and odors. Combining both a HEPA filter and a carbon filter provides the most effective air cleaning filtration.Manufacturers vary on the technology used to clean the air we breathe. In addition to HEPA filters and granulated carbon filters, several manufacturers go a step further and use ultraviolet light and even photocatalytic oxidation. UV light can be used in addition to HEPA and carbon filter technologies to eradicate bacteria, viruses and mold spores. UV light, when paired with titanium dioxide, can safely and effectively oxidize a wide array of VOCs, smoke and chemical vapors. And regardless of the manufacturer, none of the models we carry produce any ozone, that also means all of the UV models we offer are ozone-free as well.

Some manufacturers implement pre-filters in conjunction with the other filter technologies mentioned above. Pre-filters extend the life of the HEPA filter and increase air cleaner efficiency by trapping larger particles before they get to the primary HEPA filter. Others still will combine UV bulbs with filtration to sanitize the air, killing microbes as they pass through.Additionally, manufacturers use electrostatic or electronic filtration technology. Electrostatic air cleaners use very small levels of positively and negatively charged particles to attract particles to collecting plates or filters. For example, airborne particles entering an air purifier are positively charged; and, the collection media is negatively charged causing the two to attract to one another. Manufacturers like Blueair have ionizers built into their units, but these are features that are not primary to their air filtration process. Other units, like 3M air purifiers, rely solely on electrostatic filters as an inexpensive alternative to HEPA filters.

Another process used in air purification to clean the air is called ozone generation. We recommend avoiding this technology. We follow the Environmental Protection Agency's guidelines which state that ozone generators should not be sold as air cleaners. We do not sell, recommend, or endorse ozone generators, nor do any of the models we offer that have ionizers produce ozone. Air purifiers help allergy sufferers by removing allergens in a room specific environment. We recommend starting in the bedroom since people tend to spend more time in this room than any other in their house. Air purifiers only remove airborne contaminants and allergens. Particles that are heavier than air should be removed with a quality HEPA vacuum cleaner. Particles that are lighter than air include pollen, mold spores, animal dander and dust. These particles can be effectively filtered from the air in your home by using a quality air purifier. HEPA filters are essential for proper air filtration. A HEPA filter removes at least 99.97% of all particles as small as 0.3 microns, though some of the air purifiers filter particles as small as 0.1 microns with up to 99.99% efficiency.

A quality air purifier operates efficiently and quietly in a one room environment. To be effective, an air purifier must have a motor attached to a fan that draws air into the unit. Once the air is pulled into the unit, it is filtered through various types of filter media. Clean air is released back into the one room environment to start the cycle all over again. The amount of time it takes and air purifier to cycle through all of the air in a room is referred to an "air exchange." The more air exchanges per hour, the better air quality in the room. The number of air exchanges is determined by two things: the cubic volume of a room and the cubic foot per minute (CFM) output of the air purifier. More air exchanges will result from a smaller room and a greater CFM output. Ideally, we would like to see between 4 and 6 air exchanges per hour. There is no such thing as overkill when talking about air exchanges. The more air moving through the unit; then, the more the air purifier will filter the air.