When it comes to air filtration, there are a variety of systems available on the market. The most effective system depends on the size of the room, the type of particles you are trying to filter, and your budget. One of the most popular air filtration systems is the Blueair HepaSilent technology. This system is designed to filter out 99.97 percent of particles down to 0.1 microns.
In our tests, we found that in Auto mode (similar to medium) it reduced particles by 0.3 microns at 18.0% (ambient) and 26.4% (clean). In Silent mode, it reduced particles by 6.5% (ambient) and 7.2% (clean). And in Dark plus Auto mode, with its primary PECO purification system turned off and its fan at the equivalent of a medium setting, it reduced them by 21.3% (ambient) and 18.0% (clean).The Clean Air Delivery Rate (CADR) is a measure of how quickly an air cleaner can reduce particle levels in a given space. The higher the CADR, the faster and more efficient the air cleaner will be.
Room air purifiers with HEPA filters typically achieve the highest CADR. In our tests, a CADR greater than 240 is rated Excellent; 240 to 180, Very Good; 179 to 120, Good; 119 to 60, Fair; and anyone under 60 scores Poor. For example, if you live with a smoker or use the fireplace regularly, choose an air purifier that has a high CADR for tobacco smoke. That means it is optimized for larger particles in the air, such as pollen and mold spores, rather than for very fine particles such as wildfire smoke. Little field research has been done on the effectiveness of PCO air purifiers, but a laboratory study by researchers at Syracuse University in New York reported that the devices did not effectively eliminate any of the VOCs normally found in indoor air. To get the most out of your air filtration system, it's important to choose one that is appropriate for your space and needs. A larger air purifier for your main living room and a smaller one for your bedroom is a good setup.
To change the filter, unscrew the fan component from the air cleaner, then remove the washable cloth pre-filter cover from the filter. As for coronavirus, air purifiers with HEPA filters are able to capture the droplets that the virus travels through (when people cough, talk or breathe). An air cleaner works by drawing air into your chamber and passing it through a filter that captures germs, dust mites, pollen, and other potentially harmful particles from the air stream.