If you want your air to be clean and handle dust, mold, pollen, and bacteria, then a Merv 8 filter will do the job. But is a Merv 11 filter too tall for your needs? MERV 5 to 8 filters are disposable pleated media filters. They cost around four times more than MERV 1-4 spun glass fiber filters, but they have much better contaminant removal capabilities. Generally, a filter with a higher Merv rating will reduce airflow.
However, other factors such as the size of the filter and the type of fan motor in your HVAC system also play a role. We recommend this MERV rating for people with pets, children, or those looking for better indoor air quality. A filter with a MERV rating of 10 to 12 is sufficient to remove most allergy-causing particles from the air in your home. E1, E2, and E3 particles are particle range sizes used in air filter tests to determine a MERV rating.
Each air filter has its advantages and disadvantages, but both MERV 8 air filters and MERV 11 air filters are suitable for residential use. They can remove particles as small as 0.3 microns and other debris such as microorganisms and bacteria. A dirty, clogged filter reduces the efficiency of your home's HVAC system by making it more difficult to push air throughout your home. Use a MERV 8-13 filter depending on your family's needs and environment, and start using an indoor air quality monitor to help you determine if a separate air purification system is needed.
A better Merv filter should be used on the recommendation of your HVAC system supplier and professionals. Every time you use your air conditioner or oven, the air filter will become dirty as dust and particles flow through the system and accumulate in the filter. This may not seem like a significant difference compared to the MERV 8 filter, but a MERV 11 is also better able to capture between 65% and 79% of the smallest particles. You can clearly see how the air filter reduces total external static pressure by increasing the pressure drop. Using the filter with the highest Merv rating in your home would restrict that airflow, making it difficult for your HVAC to function properly. In conclusion, it is important to consider all factors when deciding which Merv rating is best for your home's air quality needs.
A higher Merv rating may be necessary if you have pets or allergies, but it is important to consult with an HVAC professional before making any decisions.