MERV Rating Systems

MERV Rating (Minimum Efficiency Reporting Value): As you have already learned, the MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.

See our chart below, AIR FILTER RATINGS EXPLAINED for further information of MERV rating comparisons.

Advantages of 4″ Media Filters

Four inch media, furnace air filters;
Flow Right Replacement, 4-inch air filters are available in most standard, and custom sizes. They provide:
  • Superior Quality, Best Prices Guaranteed
  • High Filtration Efficiency, Move To MERV 11
  • Improve Your Home’s Air Quality By Upgrading Your MERV Rating
  • Changing Your Filters Keeps Energy Costs Down By Up To 15%