Efficiency. The more sensitive a person is to allergens, the greater the need for a high-efficiency filtration system. MERV is a good way to help judge the effectiveness of an air filter. 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. In addition, you may not get the air velocity required to reach all parts of your home leaving inconsistencies in temperature. High-efficiency and high-MERV (Minimum Efficiency Reporting Value) rating filters seem beneficial because they filter out very small particulates, such as pollen, dander, and other allergens. They also found that air flow in the high-MERV filters dropped by 7% and 11% in the two HVAC systems compared to the low-MERV filters. MERV ratings classify filters on a scale on 1 to 20, and the higher the rating, the more particles the filter is able to capture. This chart also shows that as the efficiency of the media increases, the resistance also increases. An air filter’s minimum efficiency reporting value (MERV) rating measures how effectively the filter stops dust and other contaminants from passing through the filter and into the air stream. 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 high-MERV filter traps more particles, but not all systems are equipped to handle them. Yet these types of filters have some negative consequences too. Since I have an infinity controller, I will make note of static pressure before and after replacing it. If the pressure drop seems acceptable, I will stick to MERV 11. These filters can remove particles as small as 0.3 microns and other debris like microorganisms and bacteria. Filters with higher MERV ratings trap small particles more effectively than filters with lower MERV ratings. Periodic changes to the filter design can add to the price. 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. 2) Being too much of a health nut. So the low-MERV filter is hitting the ACCA design pressure drop. Here are some benefits and drawbacks of high-efficiency and high-MERV rating filters. 01-23-2009, 06:22 PM #15 A MERV 11 would be considered an “allergy” filter that does a good job of removing particles in all size ranges. Some homeowners want cleaner air, so they buy an HVAC filter with a high "MERV rating." I will order MERV 11 filters. Another reason you would want to get a MERV 13 filter is if there is a smoker in your home. Iam not a fan of 1" filters. Is MERV 13 too restrictive? They capture nearly all of the largest particles, as well as most of the smallest ones. In some cases, using an air filter that is too restrictive for your system may cause low air flow problems as well.MERV 13 is the highest MERV value safe for residential furnaces; the higher ratings are used primarily in … 5-8 MERV – Air filters with MERV ratings of 5-8 last longer than their less expensive counterparts. Because high-MERV filters can trap more particles, they are likely to clog faster than low-MERV filters. MERV 8 rated filters are high quality filters. one of those 4" thick ones flows alot more than a 12x20x1" Reactions: 2strokeNorthstar, RitcheyRch and JLawrence08648. MERV 11-13 air filters are somewhat of a middle ground between the cheap ones and the more expensive ones. It will filter out … The compressor head pressure will go up, causing higher electricity use. But this isn’t necessarily so. Two to five inch thick versions of these filters fit in box-like housings mounted onto the air handler and can last up to one year. Is MERV 11 too high? There is a battle among pleated HVAC filter manufacturers – MERV-8, MERV-9, and MERV-10 Which is “best” for your facility and how different are these prodcuts really, seeing as not too long ago they were all MERV-6 or 7? Or in English, “how effective is your air filter?” MERV ratings range from 1-16. The other two systems were created by "3M" (MPR) and "The Home Depot" (FPR) to differentiate their offerings. The scaling of MERV is not linear; the difference between a MERV 6 and a MERV 8 is nearly double in the percentage of particles captured. High-efficiency pleated; MERV Rating 11-16 Made from 4-5 inches of cotton or similar material makes these types of filters have the highest MERV rating. MERV 11 to 13 are high-efficiency filters that come in a variety of configurations. V. vweosdriver. Regular Joe Shmoes living in a regular house in a regular environment don’t need to spend the money on a higher price tag for MERV 13, 14, 15, or 16. Filters with high MERV ratings may remove more harmful contaminates from your home, but they may actually reduce the quality of the air you breath if you select a filter with a MERV rating that’s too high for your HVAC system. MERV 11 to 13 are high-efficiency filters that come in a variety of configurations. High-MERV (11) 0.32 i.w.c. Disposable pleated high MERV filters (11 to 13 MERV): High-efficiency filters can trap 0.3 micron particles like bacteria and some viruses. You’ll also have to change these filters more frequently than filters with a lower MERV rating. Is MERV 13 too restrictive? 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. These filters can remove particles as small as 0.3 microns and other debris like microorganisms and bacteria. IIRC merv 11 is abit high but possibly not too high. It is high efficiency furnace (92%) that had a MERV 8 1 inch pleated filter installed just outside the blower cabinet in the return duct. MERV is a good way to help judge the effectiveness of an air filter. A MERV rating between eight and 11 is adequate for most homes. 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. However, homeowners should also be wary of climbing too high up the MERV rating scale. MERV 8 filters remove basically the same particulates as a MERV 6, but they are more efficient; with a dust spot efficiency of 30-35%, they are 20 times more efficient than regular fiberglass filters. If the MERV rating on your filter is too high, it may force your furnace to work too hard and become vulnerable to damages. The MERV filter rating is the domestic and international industry standard rating system established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers. Choosing the right furnace filter is like the story of Goldilocks and the Three Bears. Look for cleaners with MERV ratings of 10 or higher, as this indicates a more efficient filter. MERV 11 to 13 are high-efficiency filters that come in a variety of configurations. Messages 28 Location Near Mobile. MERV (Minimum Efficiency Reporting Value) is a measure of the efficiency with which filters remove particles of specific sizes. 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. This means more energy is used, which will increase your utility bill. This can be pet allergies, pollen allergies, or even allergies to mold and dust. Unless you’re working in a clean room, medical facility or lab, anything higher than MERV 11 is overkill. Given the restricted air flow of some installed systems, even a 4” or 5” deep high efficiency filter cannot be used. MERV is a good way to help judge the effectiveness of an air filter. 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 you need the highest quality furnace filter with the cleanest air than this is the type to get. You need to find the rating that is not too high, not too low, but just right. *****PLEASE CALL WITH QUESTIONS REGARDING AVAILABILITY ON MERV 11 & MERV 13 FILTERS***** ... You may think that selecting high MERV rating filters will remove more of the harmful particles from your home, but too high of a MERV rating could actually reduce the air quality of the air you breathe in your home. If you have pets and dander is an issue, a MERV 11-13 will be much more effective at cleaning your indoor air. But for most households, a MERV 7 or 8 filter might be the sweet spot between performance and cost. Efficiency is based on the size of the particles captured by an air filter. 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. Low-efficiency filters typically lie within MERV 1-4 and high-efficiency filters are MERV 13 and beyond. MERV stands for Minimum Efficiency Reporting Value. Eventually, the fan motor can burn out, resulting in overheating and failure of the entire system. Once the filter dirt catching capacity is at the end that will cause the air flow to be restricted which will cause numerous problems. One of the issues with the furnace is that 1 inch MERV 8 pleated filter I installed is being bent toward the blower like a sail when the blower runs. These filters can remove particles as small as 0.3 microns and other debris like microorganisms and bacteria. Be aware that as the MERV rating increases, the filter gets more restrictive and it will take more pressure and energy to push air through. This rating, which ranges from 1-20, represents how well filter can catch smaller airborne particles ("1" meaning it can only catch large airborne particles, "20" meaning it can catch very small airborne particles.) In most households, a MERV 11 filter provides enough purification to keep the home healthy. MERV is a good way to help judge the effectiveness of an air filter. The mid-MERV is twice as much and the high-MERV is three times as much. 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. 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