When it comes to improving indoor air quality, it's important to consider both MERV 13 and HEPA filters. MERV 13 filters are more affordable and easier to find, and effectively remove a wide range of contaminants. However, they may not be as effective as HEPA filters in removing small particles from the air. On the other hand, HEPA filters are extremely effective at removing contaminants but they are more expensive and can be harder to find.
The purpose of the MERV standard is to allow a comparison between apples of the filtering efficiency of various air filters. MERV 13 filters can remove up to 99.97% of particulates from the air, while HEPA filters can remove up to 99.99% of particulates from the air. In addition, HEPA filters are designed to remove 99.97% of particles that are 0.3 microns or larger; this includes particles such as smoke, bacteria, and viruses. More recently, home and business owners have become increasingly concerned about the quality of air filtration systems and their ability to trap viruses.
The Centers for Disease Control and Prevention (CDC) recommends using an air purifier with a HEPA filter. In the case of an air conditioning system, a MERV 13 filter would lean toward the upper end of the scale and would filter small particles suspended in the air very well. Commercial HVAC systems can be designed to house higher-efficient air filters, including HEPA filters. MERV 13 filters are more efficient at removing large particles from the air, while HEPA filters are more efficient at removing small particles from the air. While any air filter is better than no air filter, you'll find that MERV 11-13 range air filters are perfect for most residential spaces.
Many ventilation systems are not designed for the HEPA system, but these filters are available as portable air purifiers or vacuums and can be used in homes to improve indoor air quality, especially for people with allergies or respiratory problems. In conclusion, HEPA air filters are at least 50% more effective in removing airborne suspended particles of respirable size than any of the ASHRAE air filters previously available on the market. Both MERV 13 and HEPA filters effectively improve indoor air quality, but they have different advantages and disadvantages depending on the configuration and the level of air purity required. Ultimately, it's important to consider your specific needs when choosing an air filter.
