It does not have a Clean Air Delivery Rate (CADR) which is the standard for measuring the effectiveness of air cleaners. An air filter’s MERV rating is a scale from 1-16 that describes the minimum efficiency of the air filter. At LakeAir, we recommend MERV 10 filters as our “good” air filter. The LakeAir HEPA Air Purifiers are rated MERV 16 or better. A MERV 5 filter was selected as a com-parative filter. One thing we need to make clear – this device is not a HEPA air purifier. MERV 13 filters capture airborne viruses and bacteria from coughs and sneezes. While there's no guarantee a strong air filter will protect you from the coronavirus, clean air helps keep your immune system strong. Four types of residential HVAC filters were investigated in this study. 2. Our Media Air purifiers use MERV 11 filters. MERV 15 filters are not recommended for residential application. MERV stands for Minimum Efficiency Reporting Value. Pre filters are rated MERV 2. One final way to assist with flu and coronavirus prevention is to install a MERV 13 rated air or furnace filter in your home or business. Some filters may need to be changed more often and others less often. MERV 13 filters are in short supply in some places. MERV 10, 11, & 13 filters should be changed annually; however, if you run your fan 24/7, check the filters at 6 months. Please consult with a HVAC professional to find out what MERV rating your system is equipped to handle. He recommends all schools have at least a MERV-13 filter in place in their mechanical filtration systems. Run … We do not have enough information to confirm that a MERV 15 will remove coronavirus. Similarly, if a building's HVAC system can't handle an extremely efficient filter like a HEPA or a MERV 13, then install the best filter that the system can handle. All MERV 16, 213CBN, 413CBN, and 513CBN filters should be changed every 6 months. Our Recommendations. PEF to Cuomo: Install COVID-blocking air filters for all state workers ... and buildings owned and managed by the Office of General Services are already using MERV-13 rated filters… If you can’t find a MERV 13 filter, then it’s okay to use whatever one is available to you (eg, a MERV 11 or a MERV 9 filter) It does increase the noise level in the room, so if you need to shut it off to hear, that’s okay. These are just recommendations. The good news is that researchers believe the coronavirus is pretty easy to trap in existing high-performance mechanical filters. The MERV rating system is intended to be used to determine the filter’s ability to remove particulates from the air. Because our intention was to focus this study on high-efficiency HVAC filters, i.e., MERV 12 and higher, we selected MERV 12, MERV 13 and MERV 14 fil-ters because these high-efficiency filters are commonly used in homes. The “Box Fan with a MERV 13 Filter” should be a useful tool in the fight against Covid-19. 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