MERV Ratings: Getting Your Numbers Straight
One simple way to enhance the air quality in your home is to choose HVAC filters with higher MERV ratings. Filters for cooling and heating appliances normally are assigned a MERV, or Minimum Efficiency Reporting Value. The numbers range from 1 to 16 for residential systems, and the higher the number, the smaller the particles the filter will capture before your home’s air enters the A/C or furnace.