When it comes to air quality, a higher MERV rating is often seen as the best choice. This rating indicates the level of resistance that the filter offers, which can help to reduce the amount of airborne particles entering your home. However, there are some drawbacks to using a filter with a high MERV rating that you should be aware of. The most obvious downside to using a filter with a high MERV rating is that it can reduce airflow.
This is because the filter is designed to block out more particles, making it harder for air to pass through. This can be especially problematic for air conditioning systems, as they rely on good airflow to function properly and last longer. Low airflow can also make your home less comfortable. Another issue with using a filter with a high MERV rating is that it may be too restrictive for your HVAC system. If the MERV index is too high, it can cause the furnace motor or air treatment system fan to struggle, resulting in low airflow.
Additionally, a MERV 12 filter that is only 1 inch thick may be more restrictive than a 4 inch thick MERV 12 filter. It's also important to note that while higher MERV ratings are great for air quality, they may not be necessary for your home. A MERV rating of 13-16 is considered hospital-grade air quality, so you likely don't need anything higher than that. The lowest MERV rating (1-12) will still capture pollen, dust mites, cockroach debris, sanding dust, spray paint dust, textile fibers and carpet fibers. When selecting an air filter for your home, it's important to consider both the advantages and disadvantages of using a higher MERV rated filter. While they offer great air quality benefits, they can also reduce airflow and be too restrictive for your HVAC system.
Make sure to research your options carefully before making a decision.
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