According to a report by the World Health Organization, one in ten asthmatics lives in India. Another Global Asthma Network report suggests that of the 1.31 billion people in India, six percent of children and about two percent of adults have been officially diagnosed with asthma. The actual number of sick people is likely to be much higher.
Because of fast urbanization live close to natural and clean environment in a metropolitan area, it has become almost impossible to get some fresh air. In such a scenario, air purifiers have become a necessity for many people especially if they suffer from asthma. This problem is exacerbated in winter, but it’s certainly not limited to just one season. Air pollution and breathing toxic air has become a year-round problem.
Currently, air purifiers are the most viable option to get some respite by breathing toxic air. But with so many brands and variants on the market, and so many different technologies being implemented, choosing the right one seems like a Herculean task. We take a look at the qualities to look for in an ideal air purifier.
First and foremost, an air purifier should be able to block or filter out dust particles and dander from the air. This becomes even more necessary if you live in an area with ongoing construction or an open dust field. If you have pets and they tend to shed a lot, you need an air purifier with powerful pre-filters.
Now, there are various filters that remove allergens and pollutants, but the best option is to go for a true HEPA (High-Efficiency Particulate Air) filter. They are non-ozone based and easy to maintain. In addition, they capture 99.95 percent of particles as small as 0.1 microns, such as B. various allergens, bacteria, certain viruses, pollen and mold spores, highly effective. Remember that there are different qualities of HEPA filters; The higher the quality, the better the filter. Also, try to opt for air purifiers that use HEPA filters made of polypropylene or PTFE membranes instead of fiberglass.
Air filter without ozone
Avoid ozone-based air filters that use ionizers. Ionizers work by emitting a stream of charged ions to attract dust and allergens. Although fairly popular, it is important to note that ionizers can produce ozone at ground level. This ozone can irritate your lungs. Plus, they’re bad for the environment too.
activated carbon filter
Activated carbon filters remove the pollutants and elements that cause odors. Usually, such pollutants make people sick and can cause some serious diseases. Ideally, people who live in or near industrial areas should get an air purifier that uses both HEPA filters and activated carbon filters.
Photocatalytic oxidation (PCO) filters.
PCO filters use a metal plate coated with titanium oxide, which along with UV light, oxidizes and breaks down chemicals during the filtration process. Again, this is a great feature, especially if you live in an area that is very polluted, particularly from car exhaust fumes.
Air change rate of an air purifier
The ACH (or air change rate per hour) of an air purifier is the measure of how many times the air purifier filters all air in the room in one hour. Although there is no standard unit that says a specific ACH value is good for a specific situation, an ACH value of 6 or higher is usually better. An ACH level of 6 typically means that the air in a room is changed every 10 minutes, reducing the risk of airborne disease spreading.
CADR or POLAR ratings
CADR or Clean Air Delivery Rate is the measure of how much cleaned air is delivered by an air purifier at its maximum speed setting. It is used for both the amount of airflow and the efficiency of particle removal. CADR testing is performed in small chambers with a ceiling fan and a sensor, which some manufacturers say is not the ideal way of testing as it does not replicate a real-world scenario. Dyson, for example, uses a much larger room, no fans, and multiple sensors spread throughout the test room to provide more comprehensive results. They called their method POLAR or Point Loading Auto Response Test. Ideally you should aim for a value of more than 100 CADR for dust.
Finally, one should also consider how frequently one uses the various filters of the air purifier and whether or not some of these filters can be recycled. Ideally, you should change your filters every 12-18 months of daily use. Also consider the price of the filter sets as they can be a bit pricey depending on their sophistication and efficiency.
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