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MERV Ratings: The Difference Between Each Level

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The MERV rating on an air filter shows how efficient it is for removing particles from the air. The ratings start at 1 and go up to 16, with 1 being the least efficient and 16 representing the highest MERV rating, or most efficient. It’s important to know what MERV stands for and the differences between MERV ratings. MERV is an acronym for Minimum Efficiency Reporting Value. It’s a rating system developed to give consumers a way to identify how efficient a filter is. In general, you can group MERV filters into four categories.

MERV 1-4

The lowest rated filters can remove pollen, dust mites, and other particles. They are often used to keep dust from entering your heating or cooling systems. This dust can reduce the efficiency of the system and damage the coils. These are the least expensive options if you are on a budget.

MERV 5-8

Filters in this category provide better filtration than MERV 1-4, effectively removing mold spores and dust from the air. When comparing MERV 5 vs MERV 8, you’ll find that while both options improve air quality, MERV 8 filters offer a higher level of filtration. These filters remain budget-friendly, making them an excellent choice for enhancing indoor air quality without breaking the bank.

MERV 9-12

If you have allergies or asthma, a filter rated between 9 and 12 is best for you. It can remove a lot of substances that cause allergic reactions. This can include pet dander and auto emissions. These filters can also help extend the life of the HVAC system by keeping the inside dust free. The price of these is higher than lower rated filters.

MERV 13-16

Filters rated between 13 and 16 have the highest efficiency when it comes to home air filtration. The only thing higher is HEPA filtration. You will often find these in hospitals, labs, and government facilities. These MERV filters can get bacteria, mold, dust, dust, and viruses. They are best for people who have severe allergies or a compromised immune system.

Understanding the difference between MERV 12 and MERV 13 is crucial, as MERV 13 filters provide better filtration efficiency, capturing smaller particles that MERV 12 filters may miss.

Choosing the Right Filter

There’s one thing to consider before you go out to buy a MERV 16 filter. The higher the MERV rating on a filter, the more air resistance it causes due to the finer mesh. This higher air resistance causes the HVAC air handler to work harder to pull air into the system. Older systems may not be able to handle the highest MERV rated filters.

Your best solution is to talk with an HVAC professional first. Call Cahill Heating, Cooling, Electric, Plumbing & Sewer, Air Conditioning, and Electric today. We are happy to help you find which MERV rating would be best for you and your air quality needs.

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