MERV stands for the "Minimum Efficiency Reporting Value", and it's numerically rated from 1 to 16 based on the level of pollutants they are capable of trapping. You'd think that you'd always just opt for the highest MERV rated filter to minimize pollutants in your home, but the higher the MERV rating the more dense the filter, which will reduce air flow from your HVAC system causing units to overwork themselves in order to heat/cool your home. So it's important to know what the rating levels are capable of and to determine what's best for your home, especially if you or your family members suffer from allergies or sensitivity to other pollutants such as dust or pet dander.
The air filters typically found at a home improvement store are MERV 1 to 4. These ratings are appropriate for typical household use. Filters at these ratings trap most pollens, dust mites, spray paint dusts, carpet fibers and more basic pollutants.
But maybe you use a few aerosols in your home such as hair spray or fabric protector, in which case you may want to opt for a MERV 6 or 7 filter to handle the particles before they compromise your indoor air quality.
If you've got pets or your smoking inside, a MERV 8 to 11 may be what you need to keep animal dander and tobacco from affecting your air quality.
Anything 12 and higher can trap the most minuscule of particles. Only people who must maintain the most hygienic of environments typically opt for filters of this level. For example, hospitals utilize between MERV 13 and 16 rated filters, which can trap even a sneeze from circulating.
It's up to you to decide what's best for your home, but we can help! Give us a call today for all your HVAC needs.
