MERV 11 oven filters have a particle arrest rate of just over 90%, while MERV 13 HVAC filters boast a particle arrest rate of around 98%. This makes the latter significantly more efficient. But what is a Merv rating? It is a measure of the filter's ability to stop dust particles and other contaminants from passing through. The MERV 13 air filters provide superior filtration power against fine particles compared to MERV 11 filters.
They are also effective at filtering smoke, airborne viruses, and smog, making them ideal for heavily polluted areas, areas affected by wildfires, or to help prevent the spread of disease. However, higher MERV ratings come with an associated price difference and airflow resistance. Ultimately, there is no price for peace of mind. If you feel that a high MERV filter would provide it, then go for it - just remember to replace dirty filters often enough, which can be a week or two depending on the MERV rating, the effective area of the filter, and the amount of particles entering your home.
A MERV 8 filter 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. A MERV 13 filter is likely to help if the goal is to prevent droplets from passing through. ASHRAE recommends MERV 13 and 14 filters for optimal performance.
However, it's best to select a filter with the highest possible MERV rating for your specific HVAC system. A MERV 11 filter traps all of that plus pet dander, smoke, smog, and air from coughs and sneezes. If you are washing fabrics with alcohol or other chemicals, then a high activated carbon filter could be your best option. Finally, surgeries and HVAC systems don't use fiberglass filters - they use Merv filters.MERV 11 filters are slightly more expensive than lower rated ones but can improve indoor air quality to help relieve people with respiratory problems.
By investing in a higher quality filter you can ensure that your home is free from pollutants and contaminants.