When it comes to air filters, the higher the MERV rating, the better the filtration.
Merv 8
filters are effective at removing most particles larger than 3 microns, such as lint, dust, pollen, mold spores, dust mites and their debris.Merv 10
to Merv 12 filters can remove particles between 1.0 to 3.0 microns and larger. Generally, a MERV 8 filter is considered superior to lower MERV ratings.But is filtration enough? If you are concerned about outdoor air pollution, family members with respiratory problems, or pets in the house, then a higher MERV rating might be a good idea. The table below shows the different MERV classifications, their typical uses, and the materials and shapes from which they are made. Keep in mind that if you use a higher MERV rating that traps more particles, you may need to change the filter more often. Mathematically speaking, if you want the best air quality you should buy a filter in the MERV 13-16 category. The MERV rating system is designed to determine the filter's ability to remove particles from the air.
A filter with a MERV rating of 1 to 6 is the lowest range of MERV ratings and can trap mold and pet dander spores along with dust and pollen. A MERV 8 air filter is a complete option that is quite affordable. However, if you want to trap smaller particles such as bacteria, tobacco smoke and burnt wood, then you should opt for a filter with a MERV rating of 13-16. This type of filter is more restrictive and can cause damage to your compressor, heat exchanger and air conditioner coil if used incorrectly. In conclusion, if you are looking for an affordable option that can remove most allergy-causing particles from your home's air, then a filter with a MERV rating of 10-12 should suffice.
However, if you want to trap smaller particles such as bacteria and tobacco smoke, then you should opt for a filter with a MERV rating of 13-16.
