A Merv 11 air filter has a higher efficiency rating than standard filters, meaning it can capture finer particles and remove more pollutants from the air. But is this filter too tall for your needs? The short answer is yes, but it's not really a problem, except in extreme circumstances. Most modern HVAC systems are designed to work with taller MERV filters, so millions of homeowners depend on them without any issues. The main risk of high-efficiency air filters comes from not changing them regularly.
If you keep up with changing your filter, you won't experience any problems with your HVAC system. Although the American Society of Heating, Cooling and Air Conditioning Engineers (ASHRAE) suggests MERV 13, it may not be the most efficient option for some residential HVAC systems. In fact, MERV 11 may even be too restrictive. It's best to follow the manufacturer's recommendations or consult an HVAC professional to determine the best MERV rating for your specific system.
Using an oven filter with a MERV rating higher than necessary can have adverse effects. The thickness of the filter material in a MERV filter 11, for example, is greater than that of a MERV filter 8.Therefore, in order for sufficient air to pass through the filter, more energy is consumed. This can cause more wear and tear on your oven, so be sure to maintain it regularly. However, MERV 11 filters are not considered too tall for residential use.
Anything higher than a MERV 11 is designed for commercial or domestic homes with family members suffering from respiratory problems. Generally, a filter with a higher MERV rating will reduce airflow. However, there are many other factors at play, such as the size of the filter and the type of fan motor in your HVAC system. Since the MERV rating system is standard, it makes it easier to compare filters with different ratings.
If your family has health problems or allergies, then you may want to look for a high-efficiency filter that is MERV 11 or higher. Low-efficiency filters are generally within MERV 1-4 and high-efficiency filters are MERV 13 and later. MERV 11 air filters are more expensive than standard filters, but paying a few dollars more per filter is generally worth the extra efficiency. While ASHRAE recommends MERV 13 and 14, it's best to select a filter with the highest possible MERV rating for your specific HVAC system.A MERV 8 is considered superior filtration compared to air filters with a lower MERV rating.
This applies to homes with smokers or pets as well, as MERV 11 air filters better eliminate odors. While MERV 8 is known to be effective at filtering contaminants such as pollen, dust mites, sawdust, mold spores, and lint from the air, higher MERV ratings will clean the air even more.