The MERV rating is a standard that rates the overall effectiveness of air filters. Higher MERV ratings provide finer filtration, meaning fewer dust particles and airborne contaminants pass through the filter. MERV ratings range from 1 to 16, with ratings above 12 commonly used in settings that require very clean air such as hospitals or laboratories.
/mɜːrv ˈreɪtɪŋ/
The MERV rating is a standard that rates the overall effectiveness of air filters. Higher MERV ratings provide finer filtration, meaning fewer dust particles and airborne contaminants pass through the filter. MERV ratings range from 1 to 16, with ratings above 12 commonly used in settings that require very clean air such as hospitals or laboratories.
What does a higher MERV rating mean?
It means the filter captures smaller particles, improving air cleanliness but potentially increasing airflow resistance.
Source: The Cooling Company
Higher MERV ratings capture smaller particles.
Homeowners and businesses use MERV ratings to choose filters that match their needs. For example, a family with allergies may choose a higher MERV filter to reduce indoor allergens.
Replace air filters on schedule to maintain indoor air quality and HVAC performance.
“Replace air filters on schedule to maintain indoor air quality and HVAC performance.”
The MERV rating system was developed by ASHRAE to standardize filter performance.
What MERV rating should I use at home?
Most homes do well with MERV 8–13, depending on allergies, pets, and system capacity.
Can a filter with too high a MERV rating cause problems?
Yes. Excessive airflow resistance can strain the system and reduce efficiency.
How often should I replace my air filter?
Typically every 1–3 months, depending on use, filter type, and indoor conditions.
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