Are high MERV filters bad for AC?

While the highest MERV ratings are the most effective for air quality, they can harm your HVAC system. A higher MERV rating means a higher resistance, which means less airflow. When researching HVAC systems, airflow will come up a lot.

Do higher for filters restrict airflow?

Generally, a filter with a higher MERV rating will reduce airflow. However, there are many other factors at play such as the size of the filter and the type of blower motor in your HVAC system. Filters for central HVAC systems are usually the primary form of particle removal for residential and commercial buildings.

Can I use higher MERV rating restrict airflow?

Using an air filter with a MERV rating that’s too high is just as bad as using one that’s too low. Air filters with higher MERV ratings can filter more, but the thickness of the filter material can restrict airflow.

Do Filtrete air filters restrict air flow?

Most Filtrete™ Filters (those above MPR 300) have fibers with a permanent electrostatic charge. That charge lets filter media fibers capture teeny-tiny particles much more efficiently—without restricting airflow.

Does MERV 13 filters restrict air flow?

MERV 13 air filters are the highest-rated air filters for home use. Any air filter with a rating higher than 13 will restrict air flow to the point of which could cause damage to your HVAC system, resulting in an added expense to fix it.

What if my air filter is too big?

Air Filter Problems with Poor Fit If you purchase a filter that’s too large, it won’t slide into the slot correctly. If the filter is too small, it won’t cover the entire space and may allow dust and dirt to flow past.

What MERV rating is best for air flow?

If your unit is older and/or very sensitive with airflow, use a filter that ranks from MERV 1 up to possibly MERV 6. If you want your air to at least be cleaned and handle dust, mold, pollen, and bacteria, then a MERV 8 will do the job.