Best Air Purifier for Allergy
Information about the best air purifiers including electronic and HEPA purifiers.
Which air purifier is the best and do you even need one at all ? Certain households gain significant benefits from their use, especially those wherein one or more family members have been diagnosed with asthma, allergies, or other respiratory problems.
Below is a brief description of two kinds of air purifiers to help you choose the best one for yourself, and for your family:
Electronic Air Purifiers
Electronic air cleaners, or purifiers, are designed to eliminate dust and pollen particles from the air in your home. They use electro-static precipitators to attract dust particles, much in the same way that a magnet will attract small iron filings. An electronic air cleaner can capture up to 95% of airborne dust particles, and 99% of pollen particles. It is necessary to clean the filter on a periodic basis.
Cleaning Method
Follow the guidelines in your model’s instructions which usually states to do the following:
- turn off power to the electric air purifier
- soak the collector cells and pre-filters in bathtub filled with hot water and about half a cup of dish soap for at least 30 minutes.
- rinse to remove soap residue and reinstall when completely dry
The downside to the electronic air purifier is that it does not capture all smells or gases, and it is less likely to capture large particles as they fall more quickly to the furniture, walls, and floors.
HEPA Purifiers
Perhaps the most popular kind of air purifier is the HEPA, which stands for High-Efficiency Particulate Air. The disposable HEPA filters are capable of capturing at least 99.97% of airborne particles that are 0.3 micrometers in diameter. Airborne particles of this size have been determined to be most difficult to filter. Particles that are smaller, or even larger, can also be efficiently filtered. The more expensive HEPA air purifiers have been used in certain hospitals to combat the SARS epidemic.
Electronic vs HEPA
Which are the best air purifiers ? While there appears to be a slight advantage with the HEPA filters, the bottom line is that the best air purifier is the one that meets your needs and preferences.
How to determine the best air purifier for your needs ?
- Do you prefer to buy replacement filters as with the HEPA, or do you prefer to periodically have to clean the filter as with the electronic air purifier?
- The HEPA filters retail approximately $16 to $80 each, depending on which system you purchase, but the initial cost of the unit is lower than that of the electronic air cleaner.
- If you suffer from asthma or severe allergies, the HEPA might be best suited for you.
Whatever you choose, improving the air quality of your home is conducive to better health, and therefore a wise investment.
Gary Martin is a freelance writer specializing in health and allergy research for the Mold Removal Unitwebsite.
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Did you know that the quality of the indoor air you breathe has a direct negative impact on your cardiovascular system? Read more about the link between IAQ and cardiovascular disease as well as what you can do to protect yourself and your family.
A recent scientific investigation published in the "American Journal of Respiratory and Critical Care Medicine" found that the IAQ (Indoor Air Quality) inside your home or office (indoor air that is recycled ) has a significant effect on your cardiovascular system - especially if you’re over 50. Although researchers have known for some time that air pollution leads to an increased risk of heart disease (the number one killer in America), this was the first project to study the connection with indoor air. The results will not only surprise you, they’ll point out something you can do right now to help protect yourself and your family.
The Background of the Research
In the study, a team of researchers from Sweden and Denmark looked at the affect of tiny particles on endothelial cells. Endothelial cells line the interior surfaces of all blood vessels as well as the heart, and support blood flow by performing a number of important functions including reducing friction (and thereby reducing the work load on your heart). A reduction in the Microvascular Function (MVF) of endothelial cells through inflammation or other types of stresses can lead to a number of cardiovascular diseases including atherosclerosis.
The study was a randomized, double blind study performed on 21 nonsmoking couples aged 60 to 75. All participants were in good health and all lived near busy roads meaning that they were routinely exposed to road dust as well as auto and diesel exhaust. The couples were studied in their homes and were randomly selected to be exposed to filtered air followed by non-filtered air, or the other way around while the researchers measured the amount and chemical properties of the particles in the air. After every test, the Microvascular Function (MVF) of each individual was measured.
Why study "tiny particles?" Because a significant portion of air pollution is made up of "particulates," tiny particles that are found in auto and diesel exhaust, cigarette or other types of smoke, and industrial stack emissions. These tiny particles are microscopic in size and are easily inhaled into the lungs where they enter the blood stream and contact the endothelial lining.
The Results and Conclusions
Once the investigation was concluded, some of the more significant results showed that:
- Filtering the indoor air improved MVF by more than 8%. This is pretty significant and is something any of us can achieve by following some of the recommendations listed below.
- The diameter of the airborne particles and their mass, had a greater effect than their total number concentration. In other words, the smallest particulates (smaller than 2.5 micrometers) were the biggest hazard, mainly because these particles are too small to be caught by the body’s natural defense systems and can easily enter the lungs and blood stream.
- MVF was also significantly linked to being exposed to airborne particulates containing iron, potassium, copper, zinc, arsenic, and lead. This is important to those of us that happen to live near industrial or manufacturing plants.
Based on their results, the researchers concluded that, "Reduction of particle exposure by filtration of recirculated indoor air for only 48 hours improved MVF in healthy elderly citizens, suggesting that this may be a feasible way of reducing the risk of cardiovascular disease."
The Limits of the Study
It’s significant to note some of the limits of the study in order to get a more balanced view of the results. First, note that all of the participants were in an age group (60 to 75) that is particularly susceptible to respiratory and cardiovascular disease to begin with. However, this does not mean that everyone else is immune.
According to the US EPA, the people that are most at risk from particles, mold, or other respirable hazards include:
1. Young children and babies (their respiratory and immune system is still developing)
2. The elderly (their respiratory and immune system is not as efficient as it used to be)
3. The sick or immune compromised (their respiratory and immune system is already under attack)
4. People with underlying respiratory disease such as asthma or severe allergies.
Secondly, this study only looked at the effect of airborne particles on the cardiovascular system so it was a very narrow study. The study did not include other common factors that also affect Indoor Air Quality such as allergens, dust, pet dander, dust mites, mold, temperature and humidity, to name a few.
What You Can Do
Although it’s true that this particular investigation focused on the elderly (aged 60 to 75), I personally believe that the results apply to all of us to some extent or another. The extent that you are affected by airborne particles is going to depend on your age, your genetic makeup, your over all health and fitness level, your work and living conditions, and so on. Most of these you can’t do anything about. However, there is one factor you have some degree of control over: the amount of particulates in your home. Fortunately, there are a number of easy ways to reduce the amount of particles floating around in your indoor air.
Reducing Airborne Particles in Your Home
A couple of easy ways to reduce the amount of particles in your indoor air include:
1. Reduce airborne particles by cleaning often. Purchase or make sure you have a vacuum with a HEPA filter on the exhaust. "HEPA" is a type of filter (not a brand name) and it stands for "High Efficiency Particulate Air." A HEPA filter will filter out a minimum of 99.97% of all particles 0.3 micros or larger. If you use a vacuum without a HEPA filter, all you’re doing is recirculating small particles in the air instead of actually removing them.
2. Change and/or Upgrade the filters on your HVAC. Your HVAC filters are your front-line defense in removing particles from the air inside your home. The US EPA recommends using a filter with at least a MERV 8 rating. "MERV’ stands for "Minimum Efficiency Reporting Value" as determined by the American Society of Heating, Refrigeration and Air Conditioning Engineers. I personally recommend filters with a MERV 11 but only if you have a relatively new HVAC unit (less than 10 years old). You’ll pay more but they’ll remove smaller particles from the air. If you have an older or less powerful HVAC unit, then a MERV 8 should suffice. In either case, change the filters according to the manufacturers recommendations (or more frequently if you live in a dusty area).
3. Consider reducing the amount of installed carpeting in your home and replacing it with wood or tile flooring. In the Indoor Air Quality business, installed carpeting is known as a "pollutant sink." The carpet fibers trap all kinds of dirt and gunk which it then releases back into the air every time it’s disturbed. If you’ve ever pulled up old carpet, you were probably surprised (and disgusted) at how much dirt was underneath - even though you vacuum on a regular basis. Wood or tile floors are much easier to keep clean and you can still use the occasional throw rug.
4. Purchase an air purifier for the bedroom(s). Where do you spend 7 to 9 hours of your time per night? In the bedroom. Consider purchasing a high quality air purifier for your bedroom(s). I recommend (and own) the purifiers distributed by Nikken, Inc. A word of warning though, they’re pretty expensive but they’re the best I’ve found. They’re only sold by "Wellness Consultants" (email me for the one I use). Regardless of where or what kind of air purifier you buy, make absolutely sure that it does not produce ozone. Ozone is a toxic gas that can cause a number of health problems (see EPA warning at the EPA website listed below). You’re trying to reduce indoor pollutants, not add to them.
Finally, remember that there is no "magic bullet" when it comes to improving Indoor Air Quality. However, the steps mentioned here will go a long ways towards reducing the number of particles in your home or office and reducing your risk of cardiovascular disease.
Sources
For the full article, see "Indoor Particles Affect Vascular Function in the Aged: An Air Filtration-based Intervention Study" by Elvira Vaclavik Bruner, Lykke Forchhammer, Peter Mller, Lars Barregard, Lars Gunnarsen, Alireza Afshari, Peter Whlin, Marianne Glasius, Lars Ove Dragsted, Samar Basu, Ole Raaschou-Nielsen, and Steffen Loft. Published in the "American Journal of Respiratory and Critical Care Medicine," Vol 177. pp. 419-425, (2008).
See also the US EPA web page, "The Inside Story: A Guide to Indoor Air Quality" at http://www.epa.gov/iaq/pubs/insidest.html and their warnings on ozone at http://www.epa.gov/iaq/pubs/ozonegen.html
About the Author
Hiram Perez is a fitness author and life-long martial arts practitioner. Get balanced and commonsense health information at his blog.
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