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How Can Indoor Air Purifiers Give Allergy Relief?
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Indoor air purifiers promise allergy relief. Unfortunately, as millions have discovered, that promise may be as trustworthy as a groom texting an ex-girlfriend while the Wedding March is playing. More than a few people I talk to about indoor air purifiers have concluded they were cheated. But are all of them equally worthless. What do you need to know to choose an air purifier that truly delivers allergy relief?
Do You Have the Advantage of Knowing Your Enemy?
Most people who fail to find true allergy relief from indoor air purifiers are disadvantaged by lack of accurate air purifier information. Even worse, they are misled by patently false claims by hucksters taking advantage of an unregulated industry.
Here are the Essentials About Indoor Air Purifiers and Allergy Relief:
There are three basic sources of allergenic particles.
Pollens
Mold Spores
Non-living organic waste materials, which can include pet dander; feces from rodents, pets or insects, including microscopic dust mites; particles from the dead carcasses of dust mites or roaches.
Your allergies are triggered for several reasons:
Presence of one, usually more, allergens
The total quantity of allergens present
Presence of particulate irritants, not allergens, that additionally tax you
Presence of gaseous irritants, like ozone, that exacerbate respiratory irritation
Other reasons beyond air quality you can ask your doctor about
Indoor air purifiers relieve allergy symptoms by removing a sufficient quantity of both allergens and irritants to allow your body to cope successfully without triggering a severe allergic response. If you want to achieve allergy relief your indoor air purifier must significantly lower the allergen level by:
Processing enough air
Removing enough allergenic particles and irritants from the air
While your personal results depend upon your own degree of allergic response as well as your general health, there are certain rules of thumb that work for most.
Indoor air purifiers should deliver at least four air changes per hour (ACH) to the room in which they are used. This is a sufficient volume of air to both lower existing allergens and irritants as well as overcome those reintroduced via various sources. Six ACH is the target for more sensitive individuals.
To effectively remove enough allergens and irritants from the processed air, indoor air purifiers must have filters that remove the full range of particles encountered. They also must not let air bypass the filter but demonstrate a total system efficiency close to the full efficiency of the filter.
Typical allergen particle sizes range from 2.5 micron for some pollens down to 0.1 micron for cat dander, dust mite feces and body parts.
What kind of indoor air purifiers eliminate particles like this? Only one. HEPA air purifiers alone can remove particles this size at the efficiency levels needed to give allergy relief. But not all HEPA air cleaners are created equal.
Remember what I said about total system efficiency and air bypassing the filter? Cheap air cleaners that may include a HEPA filter as a selling point may not deliver the claimed level of efficiency.
That’s why I recommend an air purifier like the IQAir HealthPro that has a certified total system efficiency of 99.5%. This makes it an excellent allergy relief air purifier. Other top rated indoor air purifiers you may wish to consider are Allerair, Airgle, Alen Air, BlueAir, NQ Clarifier, and Austin Air.
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The Top-Secret History of Air Purifiers

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As many as 8 out of 10 allergy sufferers have allergy symptoms year-round due to indoor allergens. Perennial allergy symptoms can be controlled by improving indoor air quality with air cleaners. These days, there are so many options for air cleaning: furnace filters, HEPA air purifiers, ionic air cleaners, humidifiers that wash the air, ozone generators, and whole house air purification systems . . . which may leave the allergy consumer wondering: How did we get this far with air cleaning technology?
You may think that air purification is a new craze, but in actuality, it dates much farther back than most people realize. Although antiquated, various types of air purification have been around for more than 200 years. Since the early 1800s, scientists have been working on ways to make our air cleaner. At the start of the industrial revolution in the United States, John and Charles Dean developed a mask for firefighters in 1823, allowing firefighters to enter burning buildings without being overcome by dangerous smoke fumes.
As the Industrial Revolution really took hold in America, coal burning became a basic way of life throughout growing cities. Utilizing coal allowed engineers to produce electricity and fuel to power trains and heat homes. However, as coal became a central resource for growing city life, the air became polluted with smoke and dark clouds of smog.
It was not until 1854 that John Stenhouse developed a mask worn by divers and coal miners to protect against polluted air. Stenhouse’s mask was based on a charcoal-based filter design, similar to some of the carbon filters used in air purifiers today. These masks filtered many air impurities and made tremendous advancements in the field of air purification. Using charcoal in his air filters enabled Stenhouse to filter out more harmful, noxious gases from the air than previous filtration masks. In 1871, John Tyndall upgraded the original firefighter masks created by the Deans, introducing a respirator to aid in the breathing for firefighters. The combination of the respirator device and filtration system became early precursors to today’s respirator masks.
HEPA Air Filters
Shhh! You may not know it, but HEPA filters were originally classified as top-secret, developed by the US Atomic Energy Commission to protect soldiers from radioactive particles on the battlefield. During World War II, scientists involved in the Manhattan Project used HEPA masks to guard against contaminants from the atomic bomb.
Although these early HEPA masks couldn’t possibly protect people from atomic radiation, the research spawned the HEPA filter, which provided protection against chlorine gas, mustard gas, and flame throwers. It was not until the 1960s that specifications were standardized and the term HEPA or “High Efficiency Particulate Air” was officially coined by the Department of Energy (DOE).
As defined by the DOE, HEPA filters remove at least 99.97% of dust, pollen, mold, bacteria and any airborne particles with a size of 0.3 microns at 85 litres per minute. From the beginning, HEPA filters were employed to filter out highly hazardous aerosols, toxic carcinogens, radioactive particules, and biohazardous contaminates.
Meanwhile, across the world in Germany, brothers Klaus and Manfred Hammes purchased a patent for a simple air filtration system. Using a fiberglass pad attached with small magnets to the air outlet of a residential oil oven, the Hammes brothers were able to filter soot from the air. In 1963, the Hammes brothers’ simple but effective filter became the first air cleaner to be utilized in homes across Germany.
Coincidentally, in the same year, US Congress passed the Clean Air Act of 1963 to set standards for the reduction of air pollution through fuel emissions standards. Although it was not Congress’s first attempt at reducing air pollution, the Clean Air Act of 1963 alerted scientists and consumers of the need to protect our lungs from pollutants such as perfumes, building materials, chemicals, pesticides, and allergens.
The Air Purifier Craze
No longer classified as top-secret, HEPA air filters became popular in the 1970s and 1980s as more consumers became concerned about air pollution. With the introduction of dozens of products featuring HEPA filters, new and exciting ways to control allergies and asthma finally became widely available for residential use. Originally, the first HEPA air purifiers were bulky, difficult to operate, and traditionally used only in hospital and pharmaceutical settings and among computer chip manufacturers. Then businesses began to take notice of indoor air quality concerns among residential consumers.
In response to the growing demand for cleaner air, Incen AG, the Hammes brothers’ newly formed company moved to Switzerland and began developing and manufacturing residential air purifiers in 1971. After many years of international success for Incen AG, Frank Hammes, son of Klaus Hammes, began to distribute cabin air filters as add-on accessories for Mercedes-Benz automobiles in 1990. In 1991, Frank Hammes formed IQAir North America, which has promoted the continual growth and success of the air purification industry. In 2002, IQAir air purifiers became the first air cleaners to incorporate H13 class certified HEPA filters, which capture up to 100 times more particles than conventional HEPA filters. H13 class certified HEPA filters, up to that point, had only been used in hospital clean rooms.
In 1991, through the amazing technology of True Medical HEPA and Activated Carbon, Richard Taylor created a filter that addressed the issues of environmental particulate contamination, chemical toxicity, and odors. It was then that he and his wife Joyce founded Austin Air Systems Limited. Based out of Buffalo, NY, Austin Air introduced a pre-filter that ensured a HEPA filter life unequaled to anything in the industry. Austin Air’s 360-degree intake system draws air into all sides of the air cleaner, maximizing efficiency and delivering more clean air faster. With the largest air cleaner manufacturing facility in the world, Austin Air continues to produce all the parts for their fantastic air purifiers.
Established in 1992, AllerAir quickly became a trusted name in air purification. After a family member of AllerAir founder Sam Teitelbaum developed Multiple Chemical Sensitivity (MCS) , Teitelbaum and partner Wayne Martin decided to develop their own air cleaner. Using the combination of true HEPA filters and a MAC-B (mass activated carbon bed) filters, which contain pounds of carbon, AllerAir created an air purifier that safely and effectively removes chemicals, gases, and odors from the air. With offices in the United States, Italy, and Canada, AllerAir air purifiers are used by the Mayo Clinic, IBM, Gucci, Prada, and the U.S. Army. With more than 100 model to choose from, AllerAir air cleaners are efficient, practical, and cost effective.
With headquarters in Stockholm, Sweden, and Chicago, the Blueair air purifier company is committed to creating a healthier environment both indoors and out. Founded in Sweden in 1996, Blueair quickly earned a reputation for high performance, technological innovation, and quality design. A revolutionary combination of mechanical and electrostatic filtration allows Blueair purifiers to capture 99.97% of irritating particles, gases, and odors. With more than five different models, these powerful yet near-silent air cleaners provide a visually-pleasing form and highly effective function.
Now a global leader in the production of specialty products and chemicals and a subsidiary brand of Kaz, Honeywell started as a hot water heater company in 1906 and has a longstanding tradition of supplying safe, reliable, and high-quality products. Acquired by Kaz in July of 2002, Honeywell’s indoor air quality products continually meet and exceed the American Lung Association’s Health House guidelines with meaningful innovations based on consumer research and insights. With the use of permanent, lifetime HEPA filters, Honeywell air cleaners remove 99.97% of all common, household particles such as dust, pollen, tobacco, smoke, and cat dander. The Honeywell glass-fiber HEPA material helps remove airborne particles without the use of expensive ultraviolet bulbs, chemicals, or other treatments. With a diversity of products to fit your needs, Honeywell offers a series of Home Comfort and Indoor Air Quality Solutions.
Although no longer a top-secret government project, air purifiers still hold the secrets to cleaner air and healthier environments for many asthma and allergy sufferers. Today HEPA air purifiers and filters are used in a variety of critical filtration applications in nuclear, electronic, aerospace, pharmaceutical and medical fields, as well as in homes around the world. Compare air purifiers and learn how to choose the best air purifier for your needs. An air purifier could be the secret to better breathing for you and your family.
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Not All Air Cleaners Are Created Equal
Are you ready to take another step towards a healthier life style? Maybe it’s time that you considered how your indoor air affects your health. Statistics show that more than 50 percent of Americans are not aware that poor indoor air quality is one of the top five most urgent environmental risks to public health. If you are thinking of purchasing an air cleaner to solve your air quality problems (whether they be smoke, allergies or even radon), beware of products that may have more marketing power on their side than actual cleaning power.
In order to find an air cleaner that will work for you, first you have to know what pollutants are in your air. There are the obvious indoor offenders like dust, dust mites and dander-but what about the fumes from cleaning products or the effects of airborne bacteria? These common, yet usually overlooked air contaminants have just as much impact on your health as airborne allergens-and many times are a contributing factor to allergic reactions and asthma attacks. Consider the short list of contaminants below to learn more about what may be circulating in the air throughout your house:
Microbes
These are the germs, viruses, bacteria and mold spores that can cause illness or infection in individuals with allergies or asthma, because their immune systems are constantly expending themselves on allergens. Yet, even a completely healthy individual is susceptible to viruses like flu and streptococcus-by using the correct air purifier, these can be eliminated from the air.
Odors
Smells can have an effect on your overall well-being– many people experience headaches because of certain odors from smoking, cooking, pets, etc.
Gases and Chemical Fumes
These are also called “volatile organic compounds” (VOC’s) that are found in everyday cleaners, aerosol sprays, cigarette smoke, adhesives used to make furniture and cabinetry, nail products, etc.
Particulates
Allergens are usually large enough to be considered particles, but still are small enough to fit thousands on the period at the end of this sentence. Another common source of particles is the visible cloud of smoke from cigarettes, cigars and pipes.
Below is a list of methods utilized by different air purifiers to remove contaminants– by understanding how each air purifier works, you will be able to target you air quality problem:
HEPA Air Filters
High efficiency particulate air filters remove at least 99.97% of particles 0.3 micrometers in diameter. The filters are comprised of sporadically placed fibers that collect particles in air that passes through it. Air cleaners with HEPA filters will need to have the filter replaced when it becomes full. This type of air cleaner is very effective for those with allergies and asthma (and is endorsed by the American Academy of Allergy Asthma and Immunology) and are safe for individuals suffering from impaired lung function. HEPA is also able to remove the visible clouds of smoke from the air, though it does not address the fumes or odors (usually HEPA is part of a two step technology to remove smoke).
Ozone Makers
Ozone is a reactive oxidant that is able to neutralize different chemicals and bacteria in the air and is very effective at eliminating odors. These machines rely on ozone to clean the air. It is usualy not recommended to purchase these units because of the danger of ozone build-up within a room. If you have one of these machines, it is suggested to keep these sorts of machines running on their lowest setting because too much ozone can irritate delicate lungs. If needed, you can turn up an ozone making air purifier to remove lingering smells while people are out of the house. These machines are best avoided by inviduals with asthma, COPD or any other condition that effects the lungs.
Carbon Air Purifiers
Because of the porous nature of carbon, it is one of the most effective methods of capturing fumes and chemicals. Impurities are passed through pores in the carbon, where they are adsorbed and actually bond with the carbon. Most carbon filters, like Dynamic, will also have a HEPA filter, giving a complete and highly effective air cleaning system. At some point the carbon will have adsorbed enough to become saturated and needs to be replaced. Depending on the amount of carbon used, the life-span of the filter will vary. Dynamic air filters typically need to be replaced every 3 months on average-when used to remove smoke from an office or other room, it is recommended that they be changed every 1-2 months, depending on the amount of contaminates produced. (Dynamic filters also use ionization-described below– to give maximum results.)
Ionizers
These filters do not have a cloth filter, but create a positive or negative charge to “ionize” contaminants in the air so that they will be attracted to collection grids. This charge also causes individual particles to cling to one another, forming larger particles that are easily caught on a second pass through the machine if they were too small to be collected on the first. Some ionizers do not have collection plates, but create a charge so that smaller particles will attach to each other until they are large enough to fall out of the air altogether (but be careful of these units, sometimes they simply cause particles to stick to your clothing, furniture, etc).
Ultraviolet Light
Ultraviolet (UV) light sterilizes the air, eliminating microorganisms like bacteria, viruses, germs and mold. After passing through this type of filter and being exposed to UV light, these microbes can no longer reproduce or grow. It is important that the right amount of UV be used, and that each contaminate has a sufficient amount of UV exposure time (a fan that pushes air through to quickly will not be the most efficient at sterilizing the air). Also, keep in mind that you need to make sure that the UV purifier’s power is appropriate for the size of the area you need it for– a by-product of UV is trace amounts of ozone. Whereas with the HEPA filters, more power is completely safe and effective, you don’t want to oversize your UV purifier– only buy the suggested power for your square footage.
Hydroxyl Radicals
These cleansing agents naturally occur in the Earth’s atmosphere are capable of neutralizing mold, bacteria and viruses very effectively. When oxygen atoms pull a hydrogen atom from water vapor, this radical is produced. Hydroxyl radicals are 1,000,000 times more potent at destroying airborne pollutants that ozone. When used in conjunction with ionizers or ultra violet, the only thing this air purifier won’t remove from the air is particulate, but if used with a HEPA filter, this is no longer a problem. Biozone makes several different models of air purifiers using this technology.
What’s the suggested air purifier for your home or office?
For Allergies to Dust, Dust Mites, Animal Dander, and Pollen:
You will need a filter such as a HEPA to remove the offensive particles from the air. Using ozone makers or ionizers alone will not remove allergens, and the ozone can irritate the delicate lungs of asthmatics. Example brands: Dynamic, AllerAir, BlueAir, etc. — HEPA and carbon
For Smoke Removal:
You will need a two-step approach to solve this problem, because smoke consists of two forms of air pollutants– particles (visible smoke) and gases (airborne chemicals and odor). A HEPA or carbon filter will remove the particles from the air– but to eliminate the heavy scent, you may want to also use a hydroxl radical cleaner or appropriately-sized UV air purifier. For example: Dynamic, Pollution Research, Biozone or Air Oasis In-Ducts, etc. — HEPA and carbon/UV
For Mold, Musty Smells and Mold Allergies:
Either a UV or a hydroxl radical air purifier will neutralize the odors and sterilize spores. If the spores are no longer active, they cannot sprout into new mold or irritate the lungs. Over a short period of time, these air purifiers will help eliminate mold inside your house. For example: Air Oasis, Biozone, etc. — UV or Hydroxl Radical
For Asthma or Other Lung Conditions (in children and adults):
A HEPA, Carbon or even an Ionizing air filter will give the best results without any additional lung irritation. For example: Dynamic, AllerAir, BlueAir, etc. — HEPA and carbon and/or Ionization
Before you finish reading: remember to stay clear of “cure-all” air cleaner that promise to do everything but fold your socks! Most of the time, these aren’t going to work simply because they won’t have enough power for the amount of space you need to have cleaned. Determine how many square feet need air purification and ask an indoor air quality professional for a recommendation based on your measurements.
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AllerAir 5000 EXEC Replacement Carbon Filter
AllerAir 5000 EXEC Replacement Carbon Filter Aller Air: The Aller Air 5000 EXEC and VOCARB models offer the same superior air cleaning capabilities as the 4000 model but with the added capacity of an 18 lb. mass activated carbon (MAC-B) filter, cleaning the air in your home or office in an area up to 1500 sq. ft. The VOCARB model has the same features as the 5000 EXEC with the addition of enhanced impregnated activated carbon filtration for greater adsorption of volatile organic compounds such as: Formaldehyde-Ammonia-Sulfur dioxide-Mold toxins Methylene chloride-Toluene-Tobacco smoke Specifications: HEPA filter-laser tested to remove 99.97% of 0.3 Micron particulates and larger. 18 lb Mass Activated Carbon (MAC-B ) filter 2 anti microbial filters Effective up to 1500 sq. ft. 400 CFM (cubic feet per minute) 3 speed fan Low electricity consumption. (average 80 watts) Changes the air every 30 minutes. Quiet, excellent on low for overnight use (35db) 5 year
More Information
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How Do Air Purifiers Work?
Although they may seem like a new innovation, air purifiers have been around for more than 200 years. Beginning as protective masks for fireman, air purifiers have now evolved the ability to protect you and your family from airborne pollutants.
As allergies and asthma now affect more than 50 million Americans, the concern for safe indoor air quality has rapidly increased. Now more than ever, Americans are looking for ways to improve their indoor air quality. Air purifiers lead the pack in advancements for cleaner air.
Allergens like smoke, mold spores, pollen, bacteria, viruses, pet dander, and other pollutants damage your lungs and immune system. Unfortunately, most of these irritants cannot be seen by the naked eye. Air purifiers filter allergens and pollutants seen or unseen by the human eye. To remove these objects, air purifiers typically use filters, electrical attraction, or ozone.
Air filters utilize fine sieves that filter particles from circulating air. As air flows into the air purifier, the finer the sieve used, the smaller the particles it traps. The accepted benchmark for air filters has been set by the High Efficiency Particulate Air (HEPA) filters, which are guaranteed to trap 99.97% of airborne particles larger than 0.3 microns. Microns are the standard unit used for measuring air particles. Each micron is equivalent to 1/25,400 of an inch. The naked eye cannot see anything this small, so pollutants like bacteria and viruses escape detection. Room air conditioner filters only capture particles 10 microns or larger. HEPA filters remove smaller allergens like dust, smoke, chemicals, asbestos, pollen, and pet dander.
The more times the air passes through the HEPA filter, the cleaner the air becomes. The room capacity of a HEPA air purifier will determine whether the air cleaner can handle your air purifying needs. Top-of-the-line brands like Austin Air purifiers will provide approximately 15 air exchanges per hour in an average room and contain an average of 15 lbs of activated carbon/zeolite blends, which adsorb chemicals and odors.
In addition to the HEPA filter, brands like AllerAir and IQAir offer an optional medical grade ultra-violet (UV) light system, used to quickly kill viruses, bacteria, and fungi upon entry into the air purifier. UV light also protects the HEPA filter from biological and viral contamination.
Electrical attraction is another technology utilized by air purifiers to trap particles. Three types of air cleaners work using electrical attraction: electrostatic precipitating cleaners, electret filters, and negative ion generators.
Electrostatic precipitating cleaners, or electronic air purifiers, draw particles in by fan and charge them with a series of high-voltage wires. Several plates (precipitating cells) carry the opposite electrical charge and attract the contaminants as they pass by the plates. Electronic air purifiers are perfect for individuals who don’t want to worry about the costly replacements of HEPA filters. Friedrich electrostatic air purifiers remove approximately 95% of all airborne particles and carry low energy costs for you.
Electret filters in air purifiers use synthetic fibers that create static charges to attract particles. Electret filters are offered in a variety of types including plain, pleated, disposable or reusable. Depending on the type of filter you need, will determine how often the filter requires replacement.
Some brands like Blueair combine the HEPA technology with their own electrostatic media filter technology, which charges the incoming particles instead of the filter. By marrying the two unique purification systems together, Blueair created a more effective air cleaner.
Negative ion generators or ionic air purifiers use tiny, charged wires or needles to create gas molecules with negative charges or ions that adhere to the airborne particles and collect in the filter. However, many ions end up back in the air, sticking to furnishings and other surfaces that may be stained by them.
Ionic air purifiers only remove certain types of particles and aren’t always effective against gases, chemicals, or odors. Some ionic air purifiers have been shown to re-circulate the same dirty particles that they draw in, making them much less effective than traditional air purifiers using HEPA filtration.
Instead of using filters to trap particles, ozone generators use high voltage electrical currents to convert oxygen to ozone, which acts as a powerful oxidant and breaks down molecules and microorganisms in the air. Several tests have proved that ozone generators are not very effective at removing indoor allergens.
Ozone, in fact, can be hazardous to your health, and both ozone generators and ionic air cleaners emit ozone. In nature, lightning creates ozone when it cuts through oxygen molecules in the air. In the atmosphere, ozone helps protect us from harmful UV rays; however, on the ground level, ozone is a powerful lung irritant. When created artificially, ozone can actually aggravate allergies and asthma, damaging the lining of nasal passages and lungs, causing coughing, throat irritation, chest pain, and shortness of breath. The Environmental Protection Agency and the American Lung Association advise against using ozone generators.
Asbestos and radon are growing problems in homes today. Heating devices produce carbon monoxide and other dangerous gases, and chemicals like formaldehyde and ammonia are increasing in the home environment. Since most Americans stay indoors an average of 90% of the time, providing fresher and cleaner air has never been more important.
Finding an environmentally-friendly solution has become much easier. Learn about air purifiers today. The right air purifier will provide asthma and allergy sufferers with air free of airborne pollutants and establish healthy indoor air quality for you and your family.
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Air Purifiers For Mold Allergy Relief
Mold – the microscopic fungi that invades your home to expose you and your family to severe health risks. Although mold comprises the “blue” of bleu cheese, it is neither tasty nor inviting when it’s invading your home. Now more than ever, allergy and asthma sufferers (and even those who aren’t allergic to mold) are looking for a solution to their mold troubles.
Are air purifiers the answer to mold problems?
Inside the home, molds like Alternaria, Aspergillus Chaetomium, Cladosporium, Fusarium, Mucor, Penicillium and Stachybotrys grow frequently in places that are warm, damp, and dark. However, mold itself does not trigger allergic or asthmatic reactions. Instead, the microscopic mold spores (seeds) floating through the air cause coughing, wheezing, stuffy and runny noses in those who are allergic. These awful mold spores make indoor and outdoor air quality unbearable for some. As tiny mold spores float in the air and evade the protective mechanisms of your respiratory system, you’ll find comfort in the fact that there are effective ways to reduce and eliminate mold in your home.
Most air purifiers combat the multiplying presence of mold using a very powerful weapon: the HEPA air filter. HEPA (High Efficiency Particulate Air) filters excel at trapping microscopic particles. True HEPA filters must meet strict standards of efficiency, capturing a minimum of 99.97% of pollutants at 0.3 microns.
As mold spores range between one and five microns in size, HEPA filters are certified and proven to remove virtually all airborne mold spores. Thus, air purifiers provide mold allergy relief. Ensure that your air purifier contains a HEPA filter by looking on the package. Each HEPA filter is marked accordingly and represents the strict guidelines for which HEPA certification requires.
HEPA filters eliminate mold spores by filtering the airborne spores from the air and trapping them within the HEPA filter. To effectively filter mold spores, place the air purifier where mold is frequently found: basements, bathrooms, kitchens, and rooms with upholstered furniture. Replace your HEPA filter frequently, as advised on the packaging, to ensure that your air purifier will continue to provide air free and clear of mold spores.
Austin Air Allergy Machine air purifiers include HEPA filters which consistently rank as #1 in the world. Also included in the Austin Air Allergy Machine air purifiers is a special patented HEGA (High Efficiency Gas Adsorber) filter which eliminates not only airborne contaminants like pollen, mold spores, and pet dander, but also odors, gases, and smoke. This innovative combination provides fresher, cleaner air for you and your family.
For industrial strength protection against airborne contaminants, the AllerAir 6000 series air purifiers come with effective HEPA filters as well as two antimicrobial filters to eliminate mold, viruses, and bacteria. AllerAir air purifiers also come with an activated carbon filter which eliminates Volatile Organic Compounds (VOCs), chemicals, gases, and odors.
However, nothing can top the air cleaning abilities of the NQ Clarifier air purifiers. The NQ Clarifier air purifier is the only air purifier that provides five stages of unmatched filtration. Within the NQ Clarifier’s five stages of air purification are: a Polyester Pre-filter, a True HEPA filter, a carbon filter, a carbon post-filter, and two ultraviolet lamps that efficiently kill airborne microorganisms. The NQ Clarifier air purifier offers hospital-grade filtration that will guard against chemicals, VOCs, odors, pollen, bacteria, viruses, and of course, mold spores.
Also, to ensure that your home remains mold-free, use hygrometers and humidity gauges to monitor and manage the humidity levels in your home. Mold loves humidity and thrives in areas that are damp and dark. After testing your home’s humidity levels, use dehumidifiers to lower the humidity if necessary, and place HEPA air purifiers in problem areas.
Air purifiers offer the perfect solution to filter out airborne mold spores. But don’t forget to vacuum! Vacuum cleaners with HEPA filters will eliminate mold spores on your carpet and rugs. Vacuum regularly with your HEPA vacuum cleaner to ensure that your rugs and carpets remain clean of mold colonies.
And for the nasty black spots and smears of mold colonies on countertops and shower heads, use special cleaners like M-1 House Wash, M-1 Sure Cote, or MoldZyme.
Don’t let mold take over your home. Breathe easier with a HEPA air purifier.
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How to Select the Best Air Purifier For Your Needs
Indoor air pollution is a serious problem. According to the Environmental Protection Agency (EPA), air pollution levels are two to five times higher indoors. In some buildings with a lack of proper ventilation, the indoor air may be 100 times more polluted than the air outside! This is because modern buildings are constructed with energy efficiency in mind. However, the tight seals that make a home energy-efficient also trap pollutants inside. On top of that, the average American takes nine out of ten breaths indoors, so it’s imperative to make sure that your indoor air is free of allergens and other impurities.
Air purifiers eliminate allergens, toxic chemicals, and other dangerous pollutants. This article explains why people use air purifiers, how they work, which air purifiers you should avoid, and how to select the best air purifier for your needs.
Common Indoor Air Pollutants
What is the source of indoor air pollution? In terms of organic pollutants, mold and dust mites are everywhere – and they are the two most common causes of year-round allergic rhinitis (hay fever). Pollen is also a pervasive allergen that always finds its way into your home since it is so small and sticky. If you have pets, they will surely spread their dander to every nook and cranny of your home. Many viruses and bacteria are also airborne.
Even though they are not organic allergens, Volatile Organic Compounds (VOCs) cause many people to experience allergic reactions and other health problems. VOCs include formaldehyde, fragrances, pesticides, solvents, and cleaning agents. VOCs can enter the air through chemical off-gassing from furniture, new carpets, adhesives, plastics, and various building materials. Furthermore, many VOCs are known carcinogens (cancer-causing agents).
Environmental contaminants like cigarette smoke, carbon dioxide, carbon monoxide, and nitrogen dioxide may also be present in your indoor air, as well as toxic heavy metals like airborne lead, mercury vapor, and radon.
How Air Purifiers Work
HEPA air purifiers use a HEPA air filter, which was developed by the Atomic Energy Commission in the 1940s as a way to filter radioactive contaminants. HEPA filters set the standard for air purifiers: to be classified as HEPA, a filter must capture a minimum of 99.97% of pollutants at 0.3 microns or larger. Top-selling HEPA air purifiers include the Austin Air purifier, available with a HEGA (High Efficiency Gas Adsoprtion) filter, along with air purifiers from IQAir, Allerair, Blueair, and Honeywell.
Activated carbon filters remove gases, odors, and chemical toxins. The carbon is “activated” when it is treated with oxygen, which opens up millions of tiny pores to attract and adsorb chemicals. Impregnated carbon filters have been treated with an additional chemical, normally either potassium iodide or potassium permanganate; these chemicals, known as chemisorbents, improve the carbon filter’s ability to trap VOCs and other chemically reactive gases.
Electrostatic filters use an electrostatic charge to attract pollutants and trap them on collector plates. These filters are great for people who don’t want to have to worry about changing HEPA filters, but if the collection plates are not cleaned frequently, they quickly lose efficiency. Also, beware that some electrostatic filters emit ozone, which is known to be a powerful lung irritant and can be very irritating to some people with asthma or allergies. The Friedrich air purifier is, by far, the best electrostatic air purifier, as well as the overall top-ranked air purifier in previous Consumer Reports rankings.
Charged media filters give pollutants an electrostatic charge before collecting them in a traditional filter. Charged media filters are typically quite effective, but like electrostatic filters, they lose efficiency rapidly-and they may require frequent and expensive filter changes. Some charged media air filter units also emit ozone. The advantage of charged media filters is that they are quieter and more energy-efficient than HEPA air purifiers. The Blueair air purifier is the best charged media filter, and it does not emit ozone.
Where and How to Use an Air Purifier
If you suffer from allergies (especially if you’re allergic to dust mite allergen), then the best place for an air purifier is your bedroom. It’s essential to have clean air in your bedroom because you spend about a third of your life there. If you’re allergic to animal dander and have pets, then you may want to place an air purifier in the room where your pets spend most of their time-and keep the pets out of your bedroom! Also, you should not place an air purifier in the corner of a room; it should be at least a couple of feet away from the walls for maximum air flow.
You should run your air purifier continuously for optimum performance. Most air purifiers have high and low settings. Even if you go on vacation, we recommend that you keep your air purifier running on low. Otherwise, you’ll return to a house full of polluted air! If you are concerned about your electric bill, find out how much energy an air purifier uses before buying it. Typical HEPA air purifiers can use anywhere from 50 watts on low to 200 watts on high. For comparison, a typical lamp uses about 60 watts, while a typical computer uses about 365 watts.
Air Purifiers to Avoid
Avoid ozone generators and ionizing air cleaners. These air purifiers create ions that attract pollutants; however, many of the pollutants are released back into the air, often times leading to dirty spots on nearby walls. Besides the fact that they don’t do a good job of cleaning the air, ozone generators and ionizing cleaners also emit ozone. Ozone, a main component of smog, could potentially lead to a serious asthma attack.
Moreover, David Peden, researcher at the Center of Environmental Medicine and Lung Biology at the University of North Carolina, has examined how ozone exposure might exacerbate the allergic response of people who are allergic to dust mites, and his results suggest that ozone worsens the asthmatic response. The EPA has warned consumers against using ozone generators, and Consumer Reports recommends against the newest Ionic Breeze Quadra, despite the addition of OzoneGuard, a device meant to eliminate some of the dangerous ozone emitted by the Ionic Breeze.
Consumer Reports points out: “Our air-cleaning tests show that the Ionic Breeze with OzoneGuard does a poor job of removing smoke, dust and pollen particles from the air when new and after 500 hours of continuous use” and “the Ionic Breeze with OzoneGuard still adds ozone to the air.”
How to Buy the Best Air Purifier
The air purifier market is vast and riddled with confusing and often misleading advertising schemes. If you’re shopping for an air purifier, then you should first consider what kind of pollutants you’re trying to eliminate. For example, if you have problems with cigarette smoke, then you’ll want to make sure your air purifier has the ability to eliminate fumes, VOCs, and other gases.
You may also want to consider the following factors before buying an air purifier: the area coverage (make sure the square footage listed for the air purifier is about the same or slightly greater than the square footage of the room where you intend to use it); the ACH rating (Air Changes Per Hour-this number lets you know how frequently the air purifier can exchange all the air in a given room); the CADR (the Clean Air Delivery Rate tells you how much air is purified and how well it is purified); the price; how often you have to replace the filters and how much they cost; the noise level of the air purifier; energy usage; whether it emits ozone; extra features (like a filter change indicator light); the manufacturer’s reputation; and the warranty.
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Why Indoor Air Quality is Essential For Good Health
Indoor air quality is a major health concern. According to the Environmental Protection Agency (EPA), pollutant levels are two to five times higher inside the home than out. These pollutants include airborne particles and particulate matter such as allergens, lung irritants, gases, toxic chemicals, and volatile organic compounds (VOCs).
Indoor air pollution contaminates the air we breathe every day. Since you draw about 9 out of 10 breaths indoors, it’s easy to see why indoor air quality is a top health concern. You typically inhale about two tablespoons of airborne particles a day.
These pollutants put stress on your immune system, which can lead to other health problems. The effects of poor indoor air quality on an individual can vary greatly based on age and relative health. However, in general, poor indoor air quality leads to allergy symptoms, respiratory problems, and weakened immune systems. Children are especially susceptible to the health risks of polluted indoor air since their lungs are smaller and they have to take more breaths throughout the day. If you experience allergy symptoms or asthma attacks in your home, you may have poor indoor air quality. Other sources of IAQ problems may include poor ventilation, lingering odors, environmental changes like recent construction, new furniture, water damage, or a new pet.
Solutions to Indoor Air Pollution
The EPA suggests three basic methods for improving indoor air quality:
1. Control the source of air pollution.
2. Improve ventilation.
3. Purchase an air purifier.
Your first step should be an attempt to control the source of air pollution. If the pollution stems from something like mold, smoke, or chemical off-gassing, it may be possible to remove it from your home; this is most effective and lasting method of improving indoor air quality. However, some indoor air pollutants, such as dust and pollen, are too pervasive, and you can’t always get rid of the sources.
Better ventilation will improve your indoor air quality if the offending pollutant is a chemical or gas. In this case, bringing fresh air into the home can be very helpful. However, many indoor air pollutants originate outdoors, so opening a window on a high pollen-count day or in a smoggy city may not be the best idea.
The third step suggested by the EPA is to purchase an air purifier. With so many types and brands of air purifiers on the market, it’s pretty easy to find one that is well-suited to your home’s particular situation. Quality air purifiers can work wonders on IAQ. However, some popular air cleaners on the market are not very effective, and many air cleaners actually exacerbate some of the very problems they are meant to cure.
Common Indoor Air Pollutants
Thousands of different chemicals and proteins may be polluting your air. The most common complaints for allergy sufferers involve airborne particles like pet allergens, pollen, dust, mold, etc. These common allergens range in size from 0.3 to 100 microns, and they are small enough to be inhaled, but they’re too large to be easily exhaled. HEPA air purifiers represent the best method of removing common allergens.
Many other common indoor pollutants are simply household odors and gases. These pollutants include things like cooking smells, tobacco smoke, pet litter, and indoor pesticides. Such chemicals and odors can aggravate allergies and asthma.
Chemically reactive gases and VOCs are also responsible for poor indoor air quality. They are found in common household products like paints, cleaning supplies, disinfectants, and new carpets. They are especially harmful for the young, the elderly, and the chemically sensitive, and they can be hazardous to your health if they are present at high enough levels, or if your home is poorly ventilated. VOCs can cause symptoms like headaches, nausea, and throat irritation, and many VOCs are known carcinogens.
How Air Purifiers Improve Your Health
A good air purifier will rid your air of allergens, odors, chemicals, and many airborne disease-causing agents. Even if you’re not sick now, if you continue to breathe polluted air, you will experience detrimental health effects in the future. Many VOCs, for example, are known carcinogens that are likely to cause cancer after continuous exposure. When you purchase a quality air purifier, you will notice the difference. The air will smell fresher, and you will breathe better and sleep better.
Air Purification Technologies
HEPA Air Filters
HEPA stands for High Efficiency Particulate Air. A HEPA filter removes airborne particles like pet dander, mold spores, and dust, capturing 99.97% of all particles 0.3 microns and larger. Out of every 10,000 particles that pass through the HEPA filter, only 3 can escape if the filter is certified HEPA. The U.S. Department of Homeland Security recommends HEPA air purifiers because they’re highest current standard in air filtration. If you suffer from allergies, a HEPA filter is a necessary requirement for an air purifier. When looking at a HEPA filter, consider aspects like the size and quality of the filter medium. Top HEPA filter brands include Austin Air, Allerair, Blueair, Honeywell, IQAir, NQ Clarifier and Amaircare.
Activated Carbon Filters
Activated carbon removes gases, odors, and toxic chemicals. Carbon is “activated” by treating it with oxygen, which opens up millions of tiny pores, creating a surprisingly large surface area. (One pound of activated carbon can have a surface area of 60-150 acres!) Chemicals, gases, and odors stick to the carbon and are adsorbed by its huge surface area, bonding to the surface through chemical attraction. The more carbon there is, the more gases and chemicals it can adsorb. Impregnated carbon has been treated with an additional chemical, typically potassium iodide or potassium permanganate. These chemicals are known as chemisorbents, and they improve the carbon’s ability to handle VOCs and chemically reactive gases.
Electrostatic Filters
Electrostatic filters use some kind of electrostatic charge to attract pollutants. Electrostatic precipitators are air cleaners which charge particles as they pass over an electronic cell and trap the particles on oppositely charged collector plates. The advantage of electrostatic filters is that there are no filters to replace; the disadvantage is that the effectiveness of the air cleaner decreases very rapidly as the collector plates fill up with particles. Unless you are willing to wash them frequently, electrostatic filters may quickly become ineffective. Also, some electrostatic filters may generate unsafe levels of ozone, a powerful lung irritant. The Friedrich air purifier, previously ranked as the top air purifier by Consumer Reports, uses an extremely efficient electrostatic filter.
Charged Media Filters
Another type of filter which relies on electrostatic charge is the charged media filter. Charged media filters charge particles before collecting them in a traditional filter. They can trap very small particles, since they combine a filter and a charge. They can also run more quietly and economically, since the fan does not have to work as hard to draw the particles through the filter. However, like the example above, the charged-media filters lose their efficiency pretty rapidly, and some require frequent and expensive filter changes. These types of units can emit ozone, but the better ones on the market do not. If you are going to purchase this type of air purifier, make sure that it does not emit ozone. The best air purifier in this category is the ultra-quiet Blueair air purifier – and Blueair air purifiers do not emit ozone.
Ionic Air Cleaners and Ozone Generators
Ionic air cleaners operate by drawing in particles and ionizing them (giving them a negative charge). Then the particles are released into the room, where they are attracted to positively charged surfaces like walls and furniture. Since the particles are never really collected by a filter, they stick to surfaces and make your house dirty; moreover, the particles can be dislodged and re-enter the air by simple movements like walking or sitting. Most ionizing air cleaners generate ozone, which is a documented health hazard and lung irritant.
Another type of machine sold as an air cleaner is an ozone generator. Obviously, these types of machines are not recommended. The EPA has published several documents discouraging the use of ozone generators as air cleaners. Not only do they create a health hazard by emitting high levels of ozone, but they are also ineffective at cleaning the air.
Conclusion
Most homes contain a variety of indoor air pollutants, including airborne particulates, allergens, household chemicals, and odors. At achooallergy.com we recommend air purifiers that combine a HEPA filter with some type of activated carbon filter; this combination will remove the widest variety of indoor air pollutants.
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Are Ultraviolet Air Purifiers Right For You? Review These Five Issues Before Buying
Are ultraviolet air purifiers the right choice for you and your family? The promise of germ free air that saves you from unwanted illness seems too good to pass up. But is a UV air cleaner a good investment in your health? Before you buy, why not take the time now to see if these five issues are successfully addressed by your air purifier?
Five Issues Affecting Performance and Your Satisfaction
Is the UV light strong enough?
Are germs exposed long enough?
Do you sacrifice either particle removal or sterilization in HEPA filter UV air purifiers?
Is UV sterilization necessary or just an extra expense?
Can UV light damage the HEPA filter, causing premature failure?
If you prefer including UV sterilization with air purification and want a system that balances these concerns then I’ve included a few models you might like at the end of this article.
Two Keys to UV Effectiveness – Dosage and Exposure
Ultraviolet light is proven to sterilize microorganisms like bacteria, mold and viruses. Of course, this is under controlled conditions. First, a contaminated surface is directly exposed to UV light with enough intensity – the dosage. Second, the light irradiates the surface for a long enough time – the exposure.
Is it possible to get the same results inside an air purifier? With microorganisms speeding through it at a rather high rate, you have to wonder whether they are exposed to UV light long enough to be sterilized.
Obviously more sterilization will occur at lower fan speeds but that reduces the volume of air being treated. Ideally, you want an air cleaner with sufficiently strong UV light (high dosage) to achieve sterilization at the top air flow rate.
Combining HEPA Filters And UV Sterilization
If you are trying to remove particulates while sterilizing germs then HEPA filter UV air purifiers are the way to go. However, getting enough dosage and exposure raises it’s head again. Not all HEPA air purifiers with UV light supply the dosage necessary to sterilize microorganisms.
Reducing fan speed in these air purifiers may increase sterilization but lowers the air cleaning capacity of the machine. The difficulty of balancing high performance particle filtration and sterilization is why some top quality manufacturers do not offer an ultraviolet option.
In these high performing units separate sterilization is not considered necessary since the HEPA filter can trap particles down to 0.01 micron, the size of viruses. If microorganisms are being filtered out of the air why add sterilization?
Some have concerns that HEPA filters are a breeding ground for trapped microorganisms, but this hasn’t proven a problem in over sixty years of commercial and industrial use. In any case, you’ll find top quality air purifier manufacturers treat their HEPA filters with antimicrobial agents.
Certain manufacturers that offer UV as an option bathe the HEPA filter with UV light. This kills microorganisms trapped by the filter and thus alleviates consumer concerns about breeding germs in the filter.
However, there is concern about what UV light will do to the HEPA filter. HEPA material can become brittle and break up over time when exposed to UV light. This can shorten the life of the HEPA filter and require more regular filter changes.
In short, when considering HEPA filter ultraviolet air purifiers you want a high enough dosage to deliver sterilizing/killing power at the reduced exposure time of the top air flow rate. You also want the filter to be either protected from damage by the UV light by concealing it away from the light or by being constructed of materials relatively immune to UV damage.
A Few Good Ultraviolet Air Purifiers
Here are a few examples of air cleaners I’m confident will work for you wherever microorganism control is needed:
Alen A375UV Ultra HEPA
Allerair (almost all models are available with UV option)
NQ Clarifier
Airfree Air Sterilizers
Germ Guardian Hygia 6.0
Germ Guardian UV-C Air Sanitizer
Secure Air 1200 Tabletop UV Air Sanitizer
Some of these are UV sterilizers only with no other filtration and some are HEPA air purifiers with UV added. Two excellent resources where you can learn more about these UV air purifiers are AllergyBuyersClub.com and achoo!Allergy.com.
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Air Purifier Efficiency – Are You Getting What You Expect?
For far too long the air purifier industry has sold products without fully disclosing those products’ real capabilities. I’m sorry to say, there are many air cleaners that are not worth buying. This is due to failure in the single most important quality measurement, total air purifier efficiency.
Consider an illustration. A small town depends upon a levee to hold back a rain-swollen river. What if the levee is not tall enough? What if it does not extend far enough? What if it has a breach somewhere? In any of these cases the town is not protected and any confidence they have is misplaced.
Many have been led to put confidence in this or that air cleaner. Is that confidence well placed? Or are there inadequacies that the marketing didn’t reveal?
Let’s consider the air purifier efficiency of some of the most popular types of air cleaners.
Air Purifier Efficiency in Ionic Air Cleaners
Late night infomercials have made ionic air cleaners seemingly indispensable. How miraculously they clear the smoke from a sealed chamber! Everyone just has to have one. But what are you really getting?
Ionic air purifier efficiency is affected by several factors. The intensity of the electrostatic charge, the speed of the airflow passing by the collection plates, the degree of soiling already on the plates all play a role.
The fact is that even the best electrostatic precipitators under the best of circumstances are only about 80% efficient. On any given pass, only 80% of the particles in the air are removed. This can quickly degrade due to plate loading. Studies have shown that in as few as three days ionic air purifier efficiency can degrade to only 20%.
This means almost daily maintenance cleaning to ensure top performance. Given the inadequacy of even top performance, I would recommend that you simply install a high efficiency HVAC filter. A MERV 13 Filtrete filter can easily do as much air cleaning and allergen removal as many ionic air cleaners. Plus you get the added benefit of much less cost and only changing them once every three months.
Air Purifier Efficiency in Ozone Generators
This one is considered only because they are so prevalent not because they have any merit. Scientific evidence indicates that home ozone generators are all but zero percent capable of cleaning the air.
Ozone does not attack and neutralize pollutants as claimed. As long ago as the 1930′s studies showed that ozone didn’t reduce particle concentrations in air or eliminate chemicals and odors.
The claim that highly reactive ozone reacts with pollutants can be said to be accurate. That it fully decomposes pollutants is a lie. The truth is these reactions more times than not result in additional pollutants as the partially decomposed byproducts remain in the air. Ozone also reacts with everything else in the room; construction materials, furnishings, textiles, etc. resulting in even more pollutants, not less.
Add to this the fact that ozone is itself a pollutant, aggravating respiratory problems and inflaming lung tissues, you could say that air purifier efficiency in ozone generators is less than zero.
Air Purifier Efficiency in HEPA Air Cleaners
The gold standard of air purification is HEPA filter efficiency. You will see HEPA air cleaners proudly marketed with that 99.97% efficient at 0.3 micron rating. This is at once true and misleading.
That efficiency rating is for the HEPA filter material itself, not the air purifier that uses it. In some HEPA based air cleaners as much as 40% to 50% of air entering the cleaner may actually bypass the filter. Reasons range from poor sealing of the filter in the housing, cracks in the filter media and even deliberate design to reduce backpressure on an inferior motor.
It is agreed that HEPA filter air cleaners do provide the best overall air purification. However, it is absolutely essential to understand that the term HEPA should not equate to immediate trust of the purifier using it. You must examine any air purifier you are considering with a more critical eye.
Certain air purifier manufacturers have built their reputation on supplying only the highest quality air purifiers. My personal favorites are IQAir, Allerair, BlueAir and Austin Air.
Of all air purifier manufacturers, IQAir has especially set itself apart. IQAir will provide you with certification of their air purifier efficiency as a complete system. This means you can know exactly how clean the air is that exits the air purifier. I hope that one day consumer pressure or regulation results in all manufacturers doing the same. Only then can any of us be certain we are getting what we are paying for.
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