What grades of filters do you offer? Boostopia November 01, 2021 17:07 Updated Follow Our filters are offered in three grades: Essential (MERV 8) Essential+ (MERV 10) Health Shield (MERV 13) CLICK HERE FOR MORE DETAILS Related articles How do your filters compare to my current filters? How do I contact Second Nature? How much do your filters cost? What is MERV? Is It the same as MPR and FPR? Does Second Nature supply refills for electronic (powered) filters? Comments 0 comments Article is closed for comments.