Can a MERV 8 Filter Catch Mold?

Mold is a common problem in many homes and commercial buildings, but the right air filter can help reduce the presence of mold particles. MERV 5 to 8 filters are effective for controlling mold, hairspray and dust spores. These filters are commonly used in residences, industrial workplaces, commercial buildings and paint booths. MERV 8 filters are 90 percent efficient on particles from 3 to 10 micrometers in size. It's important to understand what MERV ratings mean.

On a scale from 1 to 16, the higher the MERV rating, the better the filter will be at capturing contaminants and pollutants. A MERV 8 filter is capable of capturing 20% or more of particles from 1.0 to 3.0 microns in size and 70% or more of particles from 3.0 to 10.0 microns in size. Commercial properties often require a filter with a higher MERV rating due to strict building codes and increased foot traffic. The MERV rating you need depends on several factors, such as your specific concerns about indoor air quality, the compatibility of HVAC systems, and professional recommendations. For homes where allergies and asthma are a priority, choosing between a MERV 11 or pleated filters that are MERV 8 to 13, as opposed to fiberglass, can effectively filter out small particles and reduce pressure drops. So does a MERV 8 filter catch mold? The answer is yes! A MERV 8 filter can trap mold particles suspended in the air, so there will be less of them in the air in your home.

However, some particles can still pass through them. To ensure maximum protection against mold, it's best to use an air filter with a MERV 6, MERV 8 or MERV 11 rating in your heating and cooling system. Choose a MERV 8 to 13 filter depending on your family's needs and environment, and start using an indoor air quality monitor to help you determine if a separate air purification system is needed. With the right air filter, you can breathe fresh, clean air and reduce the presence of mold in your home.