MERV Filter Ratings Explained

MERV (Minimum Efficiency Reporting Value) ratings are used to rate the effectiveness of air filters in trapping airborne particles. The scale ranges from 1 to 16, with higher ratings indicating better filtration. Here's a general breakdown of MERV ratings and what they filter:

MERV 1-4: These filters capture large particles like pollen, dust mites, carpet fibers, and lint.
MERV 5-8: These filters are capable of capturing smaller particles like mold spores, pet dander, and some bacteria.
MERV 9-12: These filters trap even smaller particles, including fine dust, some allergens, and smoke particles.
MERV 13-16: These filters provide the highest level of filtration, capturing very small particles like bacteria, viruses, and smoke.
It's important to note that while higher MERV ratings indicate better filtration, they can also restrict airflow more than lower-rated filters. So, the choice of filter should balance filtration efficiency with the needs of your HVAC system.

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