What does MERV or MERV Rating Mean?

MERV stands for Minimum Efficiency Reporting Value.  MERV values vary from 1 to 16-the higher the number, the more efficient the filter in trapping airborne particulates.  Particulates are measured in sizes referred to as "microns"  To help understand the size of a micron, imagine a strand of human hair.  The average width of hair is roughly 60-75 microns in diameter.  Particles with a micron size under 35 are not visible to the naked eye.

Filters are designed to remove most particulates from the air in your home.   Tiny particles and biological contaminants, such as pollen, dirt, mold, bacteria, pet dander, dust mites, and viruses can trigger allergies, asthma, and other respiratory problems.  More often than not, the air in your home is worse than the air outdoors.  Clean, and efficient filters not only keep the air in your home comfortable, but allow for your indoor HVAC equipment to maintain its efficiency.  Dirty air handlers or furnaces decrease the amount of air that is being distributed through your home, while putting dust, pollen, and mold back into your living areas. 

If you have pets, small children, or open the windows on comfortable days, the filters in your home may need to be changed moer frequently.  Typical filters purchased in retail locations last 30-45 days, and may only be a MERV 7-8 rating.  Prior to putting a higher MERV rated filter in your system, please consult Tempo Air to ensure that your current system will work with the new filters.  Thicker filters can mean less air going into your system, which can increase the amount of time your system has to work.