What does MERV 13 mean on a furnace filter?
minimum efficiency reporting value
MERV stands “minimum efficiency reporting value” and a filter receives a MERV rating as determined by the American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE). A MERV 13 will trap less than 75% of air particles that are 0.3-1.0 micron in size (the coronavirus is 0.1 microns).
How often should I change my MERV 13 furnace filter?
For Merv 8, 11 and 13 filters, we recommend that you change your filter at least every 3 months, however changing your filter every 2 months provides better filtration which provides healthier and cleaner air in your home.
What does MERV 12 mean on a furnace filter?
A filter with a MERV rating of nine to 12 captures particles greater than one micrometer. This includes most dust and common pollutants. Hospital laboratories and superior residential air conditioners fall within this range. A filter with a MERV rating of 13 to 16 captures particles greater than 0.3 micrometers.
Will MERV 11 stop viruses?
Minimum Efficiency Reporting Values, or MERV, reports a filter’s ability to capture particles. Filters with MERV-13 or higher ratings can trap smaller particles, including viruses.
Can I replace MERV 11 with MERV 12?
In general no. In order to use a Merv 12 to replace a Merv 11, you need to know if you system can handle the extra pressure drop caused by the higher efficiency Merv 12. My heat pump/ ventilation system cannot support the pressure drop of a Merv 12. Compressors operated above design limit will die sooner than normal.
Can I use MERV 12 instead of 11?
MERV 12 filters trap 80 to 89 percent of average particles of 1.0 to 3.0 microns, with an average particle size efficiency of 90 percent or better. As you can see, they’re pretty close. That’s why you’re just as good going with a MERV 11 as with a MERV 12. You will get decent results from either.