MERV ratings are a standard measure of how effectively air filters can trap particles from 0.3 to 10 microns (10-6 m). The Minimum Efficiency Value (MERV) rating for an air filter ranges from 1 to 16, with higher MERV indices trapping small particles more effectively than filters with lower MERV indices. In short, MERV 8 filters are 90 percent efficient on particles from 3 to 10 micrometers in size. Filters with a MERV rating of 1 to 4 are effective for controlling larger particles, while those with a rating of 5 to 8 are effective for controlling mold spores, hairspray and dust.
These filters are applicable to most commercial buildings, residences, industrial workplaces and paint booths. If someone has an allergy or respiratory problem, it is recommended to choose a MERV 11 air filter or even a MERV 13 air filter. Although the ratings don't exceed those of the MERV 16, high-efficiency particulate air (HEPA) filters trap the smallest particles at a faster rate than even the MERV 16 and are typically used in surgical operating rooms, clean rooms, and other contexts that require absolute cleaning. When comparing a MERV 8 air filter and a MERV 11 air filter, it is important to note that the MERV 11 air filter can filter a large percentage of fine particles that the MERV 8 air filter cannot.
This comparison chart helps highlight the differences between the two filters to make it easier to decide which one works best. One thing to keep in mind is that the MERV 11 air filter may need to be changed a little more frequently than the MERV 8 air filter. If applicable, it is strongly recommended to use MERV 12 filters instead of MERV 16 to protect the oven. Raising only three MERV classification levels can be a smart decision that makes the air cleaner or a harmful option for the entire air conditioning system considering the air flow capacity of the MERV 8 versus the MERV 11. In conclusion, if you're trying to choose between a MERV 8 air filter and a MERV 11 air filter, it is important to consider your needs and preferences. If you're concerned about the effects of inhaling fine air particles, that's another reason to choose a MERV 11 air filter over a MERV 8 air filter.