Using an air filter with a MERV rating of approximately 5 to 8 is an appropriate choice for most residential homes. MERV 5-8 filters provide good filtration and can remove most pollen, mold spores, and dust mites. These filters are slightly more restrictive than MERV 1-4 filters and have the ability to trap mold spores and some pet dander along with dust and pollen. A filter with a MERV rating between 1 and 6 can remove particles between 0.3 and 10 microns with an efficiency of 20%.The MERV rating system was designed by the American Society of Heating, Refrigeration and Air Conditioning Engineers in 1987 to provide a more accurate picture of an air filter's capabilities.
A MERV 5 filter will trap up to 34%, a MERV 6 will stop 35-49%, a MERV 7 will prevent up to 69%, and a MERV 8 will capture up to 85% of the particles. It's important to note that higher MERV ratings don't always mean better air quality. If you choose a filter with a rating that is too low, even with regular filter changes, indoor air quality won't improve. It's best to comply with the oven manufacturer's recommendations or consult an HVAC professional to determine exactly which MERV rating is best for your specific system. This way, you can ensure that you are using the right filter for your home and family.
Rest assured that there is a MERV air filter especially suitable to work with your HVAC system to protect it from dirt buildup and promote higher indoor air quality, while providing enough air for the equipment to work well.