When it comes to air filters, there are two main types: HEPA (High-Efficiency Particulate Air) and MERV (Minimum Efficiency Reporting Value). Both of these filters are designed to capture particles from the air, but they have different levels of efficiency. MERV 13 filters are more effective at removing large particles, while HEPA filters are better at trapping small particles. A HEPA filter with a MERV 17 rating can capture up to 99.99% of particles from the air, including those as small as 0.3 microns.
This is much higher than a MERV 13 filter, which can only remove up to 99.97% of particles from the air. In addition, a HEPA filter can capture an even greater percentage of particles that are larger or smaller than 0.3 microns. The cost of a HEPA filter is usually higher than a MERV filter, but it is worth it for certain applications such as construction zones, medical facilities, and educational facilities. For most residential spaces, a MERV 11-13 filter is sufficient.
However, it is important to be aware that some air filters are more efficient than others, so it is best to do your research before purchasing one. When looking for the best home air filter, you should also consider the energy consumption of the filter. Trapping particles in the filter can reduce the amount of harmful particles in the air, but it also requires the fan in your air conditioning equipment to work harder and consume more energy. The table below lists some of the air contaminants that air filters can capture based on their MERV classification:
| MERV Rating | Particle Size |
|---|---|
| MERV 8 | 3-10 microns |
| MERV 11 | 1-3 microns |
| MERV 13 | 0.3-1 micron |
