When it comes to air filters, the MERV rating is a measure of how effectively the filter removes materials from the air flowing through it. A MERV 8 filter is considered superior filtration compared to air filters with a lower MERV rating, as it can capture between 65% and 79% of the smallest particles. However, if you are looking for even better air quality than what the MERV 8 can offer, then a MERV 11 filter might be a good choice. This type of filter is more efficient than MERV 8 filters because they can capture smaller particles, such as pet dander, dust mites, automatic emissions and dust that damages the lungs.
When selecting an air filter, it is important to consider the MERV rating as well as the type of HVAC system you have. A higher MERV rating often means lower airflow, which can cause the system to work harder and use more energy to do its job. The American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) suggests a MERV 13 rating, but this may not be the most efficient option for some residential HVAC systems. If someone in your home has an allergy or respiratory problem, then using a MERV 11 air filter or even a MERV 13 air filter might be a good idea.
It is also important to keep in mind that as the MERV rating increases, the filter becomes more restrictive and more pressure and energy will be needed to push air through it. This means that when the air filter is dirty, less air can pass through the HVAC system, increasing operating times and reducing efficiency. Therefore, when removing the old filter, be sure to pay attention to the direction in which the arrows point to the filter to know which direction the air filter enters. In conclusion, if you are looking for superior filtration and better air quality in your home, then choosing a higher MERV rating might be a good idea.
However, it is important to consider both the type of HVAC system you have and how often you will need to change your filter when selecting an air filter with a higher MERV rating.