This is due to the fact that, if a MERV rating is too high, it can cause your entire unit to be put under too much pressure. MERV is a good way to help judge the effectiveness of an air filter. But this isn’t necessarily so. Other Rating Systems. Using an air filter with too high of a MERV for your system can have a similar effect of a clogged air filter, if a filter becomes clogged, airflow will be reduced, which causes the fan motor to work harder. Disposable pleated high MERV filters (11 to 13 MERV): High-efficiency filters can trap 0.3 micron particles like bacteria and some viruses. Messages 28 Location Near Mobile. Some are five inches thick, others range up to 12 inches thick, and some of these filters are designed to last up to a full year. A common mistake residential customers make is to install a filter that has too high of a MERV rating for their system and/or use it for too long. If the pressure drop seems acceptable, I will stick to MERV 11. I may even be temped to go to MERV … However, if someone in your home suffers from allergies, you probably want to go with a MERV 13. They are used in both residential and commercial applications and they can improve your home’s indoor air quality by removing harmful contaminants such as mold spores, hair spray fumes, and smaller dust particles. Is MERV 11 too high? 2) Being too much of a health nut. The test protocol for determining MERV ratings is described in the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) Standard 52.2-2007, Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size. Yet these types of filters have some negative consequences too. Merv 11 in 1" will remove the same particulate as a Merv 11 in 2" the difference is that the 1" will plug up faster then a 2" and be more restrictive. A MERV rating between eight and 11 is adequate for most homes. These filters can remove particles as small as 0.3 microns and other debris like microorganisms and bacteria. one of those 4" thick ones flows alot more than a 12x20x1" Reactions: 2strokeNorthstar, RitcheyRch and JLawrence08648. Once you know what the different MERV ratings mean, you can pick out the rating that will improve your air quality without choking your furnace in the process. If your family has health or allergy issues, then you may want to look for a high-efficiency filter that’s MERV 11 or higher. These filters can remove particles as small as 0.3 microns and other debris like microorganisms and bacteria. The best way to clean the air in your home, and keep it clean, is with a whole-home filtration solution with a high MERV rating, which works with your heating and cooling system to distribute healthier, filtered air throughout your entire home. V. vweosdriver. High-MERV (11) 0.32 i.w.c. Choosing filters with deeper pleats (e.g., four-inch pleats) will increase the surface area of the filter and potentially reduce the pressure drop while increasing or maintaining a high MERV rating. However, homeowners should also be wary of climbing too high up the MERV rating scale. MERV 8 rated filters are high quality filters. Choosing the right furnace filter is like the story of Goldilocks and the Three Bears. MERV 11 to 13 are high-efficiency filters that come in a variety of configurations. It will filter out … Another reason you would want to get a MERV 13 filter is if there is a smoker in your home. MERV 11-13 air filters are somewhat of a middle ground between the cheap ones and the more expensive ones. Look for cleaners with MERV ratings of 10 or higher, as this indicates a more efficient filter. You’ll also have to change these filters more frequently than filters with a lower MERV rating. This means more energy is used, which will increase your utility bill. 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