What Does MERV Rating Mean?

Explanation of MERV Rating for Furnace Filters

Minimum Efficiency Reporting Value or MERV is the standard rating the rates of the over-all effectiveness of air filters. High value MERV rating links to finer filtration which means fewer airborne contaminants and dust particles passing through the filters. MERV rating is therefore a means to determine how effective an air filter is. MERV ratings usually range from 1 to 20 wherein the higher the rate on the filter, the fewer dust and airborne particles can pass through.
Some common particles which filters are being tested for include the following:

  • Dust mites
  • Pollen
  • Carpet fibers
  • Textile fibers
  • Dust
  • Carpet fibers
  • Pet dander
  • Tobacco smoke
  • Bacteria
  • Mold spores

Most air systems at home can sufficiently eliminate airborne contaminants with filters rated between MERV rating 8 to 13. MERV 14 to 20 is commonly found in general surgery and hospital settings. If you are thinking on how frequent you must change your filter for ultimate performance, you can make your own research and assessment. You can find useful information online. As you go on researching, you will surely learn that changing the filters often is the key towards your filter’s optimum performance.

When changing filters, keep the following things in mind:

  • Filters with higher Minimum Efficiency Reporting Value ratings must be changed more often preferably at least every 3 months. This is one good way of avoiding restricted airflow which drains the efficiency and can possibly damage your exclusive system.
  • Depending on types of filters used, your filter might need changing as frequent as once every month.

MERV Rating- Helping Individuals Understand the Important Number of their Furnace Filters
Many individuals shopping for furnace filters have probably encountered peculiar question as “what is MERV? Then later on, they will learn that MERV which stands for Minimum Efficiency Reporting Value is utilized to rate the home’s furnace filter’s ability of removing airborne contaminants from the air as these pass through the filters. When it comes to measuring the overall level of efficiency of furnace filters, MERV is the standard method used. This also measures the ability of filters to eliminate particles from 3.0-10 microns in size.

To give individuals idea about the size of a one micron, 100 microns is actually about the same thickness of one piece of paper or human hair. Some examples of the MERV ratings and the particles filtered are as follows:

  • MERV rating 13-this rate signifies that filter is about 89 to 90 percent minimum efficient in terms of capturing the measured particles like tobacco smoke, bacteria and all other particles making you sneeze.
  • MERV rating 11-this rate indicates that filter is about 80 to 85 percent minimum efficient in capturing lead, dust, humidifier dust, auto emissions and other measured particles.
  • MERV rating 8-this rating means that the filter is 60 percent minimum efficient in terms of capturing given measured particles like hair spray, mold spores, dusting aids, pet dander, cement dust and fabric protector.

By learning all these essential MERV ratings, it will become easier for individuals to determine the effectiveness of air filters. If you are looking for high MERV rating furnace filters or high quality furnace filters, buy one online today and replace your old filters!