In a nutshell, the MERV rating system is used to measure the capacity of an air filter to capture airborne particles. A higher rating means that the filter can trap smaller particles. While it may seem that a higher MERV rating always means a better air filter, this is not always the case. The Minimum Efficiency Reporting Value (MERV) indicates the ability of a filter to capture particles ranging from 0.3 to 10 microns (µm).
If you are new to selecting air filters, you may still be unsure which one is the best option, despite the detailed explanation above. This comparison chart helps to highlight the differences between MERV 8 and MERV 11 filters, making it easier for you to decide which one works best. These inexpensive filters will have little impact on air flow, but will also have minimal impact on air quality. Although ASHRAE recommends MERV 13 and MERV 14, it is best to select a filter with the highest possible MERV rating for your specific air conditioning system.
This is especially true for homes with smokers or pets, since MERV 11 air filters are better at eliminating odors. It is important to note that as long as an air filter is installed in the air return, there is no way to prevent a pressure drop. Although a high MERV rating means more particulate matter will be removed from the air, it does not necessarily mean that air filters with the highest MERV rating are the best. In particular, using an air filter with a MERV rating that is too high can damage the compressor, heat exchanger, and air conditioner coil.
If you are trying to choose between a MERV 8 air filter and a MERV 11 air filter, here is what you need to know. Most air filters that can remove common allergens have the word “allergy” or “allergen” on their packaging. Choosing the right MERV rating is an important decision in terms of total cost, air quality, and product durability. Although ASHRAE recommends MERV 13, it may not be the most efficient option for some residential air conditioning systems.
It is best to comply with the furnace manufacturer's recommendations or consult an HVAC professional to determine exactly which MERV rating is best for your specific system. One thing to keep in mind is that the MERV 11 air filter may need to be changed more frequently than the MERV 8 air filter. As an expert in HVAC systems and indoor air quality, I can tell you that selecting an appropriate MERV rating for your home's air conditioning system is essential for ensuring optimal performance and efficiency. The higher the MERV rating, the more effective it will be at trapping airborne particles such as dust mites, pet dander, pollen, mold spores, and other allergens. However, it's important to remember that using an air filter with too high of a MERV rating can cause damage to your system. When choosing between a MERV 8 and a MERV 11, consider factors such as cost, efficiency, and durability.
If you have pets or smokers in your home, then opting for a higher MERV rating may be beneficial in terms of eliminating odors and improving indoor air quality. However, if you are looking for an inexpensive option that won't have much of an impact on airflow or efficiency, then a lower MERV rating may be more suitable. Ultimately, it's important to consult with an HVAC professional or follow your furnace manufacturer's recommendations when selecting an appropriate MERV rating for your home's air conditioning system. Doing so will ensure that you get the most out of your system while avoiding any potential damage.
