Key takeaways
- Higher MERV catches finer particles
- Very high ratings can restrict airflow
- Thicker filters can be both good and easy on the blower
- Change intervals depend on the home
What MERV means
MERV rates how well a filter captures particles of different sizes. Low ratings catch large dust and lint. Mid-range ratings catch pollen, mold spores and pet dander. High ratings catch finer particles but add resistance.
Most homes do well in the middle of the range.
Match it to the system
A dense filter in a system built for a thin one can reduce airflow, strain the blower and freeze a coil. A deeper media filter has more surface area and lower resistance at the same rating.
If you want better filtration, a media cabinet is the way.
Change it on time
Even the best filter does nothing when clogged. Check monthly and change by the manufacturer's guidance and the home's needs.
Our Filter Finder suggests a grade and interval.
Related services
Quick answers
Is MERV 13 too much for my system?
It depends. In a media cabinet it is often fine, and in a thin slot filter it may restrict airflow. We can measure.
Do filters remove viruses?
Filters capture some particles but are not a cure-all. We are careful not to make health claims.
Ready to talk it through? Get a free estimate or call 615-431-3789.