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Searching for how a high-MERV filter restricts airflow? Check out the risks with high-MERV filters and how you can achieve a good balance in the airflow. 


In some cases, a high-MERV filter increases the risk of restricted airflow. However, we consume modern systems for everything in our daily life, and modern HVAC systems don’t face any problems due to a high-MERV filter. Therefore, homeowners very commonly use high-MERV filters. Though the risk is not high, there are still some factors to be concerned about purchasing a high-MERV filter. 

Why Does a High-MERV Filter Restrict Airflow 

MERV is known as Minimum Efficiency Reporting Value, which determines the number of airborne particles your air filter can trap and control from entering your house. You must understand the scale of MERV rating to know which air filter is the most suitable for your home. The higher the MERV rating your air filter has, the better it is to stop the smallest particles from entering your home. 

You would want the least amount of air contaminants in your house, which is possible if you choose the highest MERV rating. Unfortunately, a high-MERV rating is good for better air quality, but it harms your HVAC unit. This ensures higher resistance to airborne contaminants but less airflow inside the house. 

This way, you look for the least amount of particles in your home; similarly, you must want a comfortable home with flexible airflow. Good airflow is essential for the longevity and performance of your furnace filter. A restricted airflow can’t help you to get a comfortable home. 

Reasons to Choose the Right MERV Ratings

Due to the obvious additional strain it places on the furnace filter, a MERV rating that is too high might expose your system to the risk of experiencing damage. You can choose Merv 1 to Merv 26, but MERV 8 and Merv 11 are more appropriate air filter ratings for residential areas. 

As the rating increases, the maximum amount of particles is captured. However, you shouldn’t choose a MERV rating of 13-17 as they are suitable for hospitals and large commercial buildings. Ratings of greater than 17 on the MERV scale aren’t necessary for residential homes.

The Ways to Minimize Restricted Airflow

Understand the Quality of your Air Filter 

Before deciding about your air filter, ensure you know the filter’s quality well enough. Check out the grade on the filter to learn its quality. The higher the MERV rating of your air filter, the more it can trap the smallest microscopic particles and pollutants. Acknowledge the importance of maintaining such 12x12x1 filters in your environment and make strategic considerations.

Go for Low-efficiency Air Filter

If you have a budget shortage but want to maximize the airflow inside your home, you can purchase low-efficiency furnace filters. However, you must remember that these air filters work less efficiently when purifying indoor air. They can stop large particles and debris, but most can enter the HVAC unit.

Maintain your High-efficiency Air Filter  

Buying a high-efficiency air filter doesn’t mean you can stay relieved for a long time without replacing the filter frequently. A high-efficiency filter can catch the maximum amount of particles and pollutants and clogs faster than usual. Leaving the clogged air filter unchanged for an extended period is the reason for restricted airflow in your house. It is easy to prevent the issue by remembering the importance of replacing the air filter at the right time. 


You should choose the MERV rating depending on the level of filtration you want. For example, it is better to select a high-MERV rating if your family members have asthma, respiratory symptoms, breathing difficulties, allergies, etc. In contrast, choose a low-MERV rating if you want to save your energy bills. If you are having trouble selecting the right filter, ask a Mervfilters professional. 

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