Air Filter MERV Ratings

Remember To Look For The MERV Rating For Your Air Filter

MERV in relation to your heating and cooling sytem stands for Minimum Efficiency Reporting Value, a value that lets us know the size of particles an air filter is designed to catch. Higher MERV ratings are better at capturing smaller particles. That’s why hospitals tend to use MERV 16 or higher, to capture the most pollutants possible.


Although lower MERV rated filters are less efficient overall, they permit more air to go through the filter, which can assist the operation of the HVAC system. It’s important to have the appropriate mix of air filter and MERV rating for to meet your home’s needs and your system. Call Limcan Certified Heating and Air Conditioning in Whitby today to see which MERV rating is ideal for your home and family.


The American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE), which created the MERV rating, recommends filters with minimum MERV ratings of 6. The U.S. Department of Energy recommends a minimum of MERV 13. For the best overall solution for most homeowners, purchase an Air Purification System, which comes with a MERV 16 media filter, and you’ll be in good shape for years.


Check out the MERV Ratings breakdown:


  • MERV 1 to 4— <20% of large particles (3 to 10 microns) are captured
  • 5 to 7—Between 20% and 69% of large particles are captured
  • 8 to 10—Approximately 85% of large particles and 50% of small particles (1.0 to 3.0 microns) are captured
  • 11 to 16—More than 90% of large particles and between 70% and 90% of small particles are captured
  • 17 to 20—Even the smallest particles (< 0.3 microns) are captured


The right MERV rating on the right filter could strongly influence impact your indoor air quality, your health and your lifestyle. So selecting the right air filter matters. Call Limcan Certified today at 905-427-2577. We offer a full range of air filtration choices, knowledge and expert service—and we’re here 24 hours a day for Whitby.

Privacy Policy | Careers

© 2018 Limcan Certified Heating and Air Conditioning Canada

All rights reserved.

Facebook icon links to Boonstra's Facebook page.