A: Hello - Thank you for asking. The FPR rating system was established by The Home Depot and stands for Filter Performance Rating. As this product is sold through Target, there is not a FPR rating. For more information about the performance of this filter, visit https://www.filtrete.com/3M/en_US/p/d/b10218021/. If you have any additional questions or concerns, please connect with our team directly at 1-800-388-3458 Mo-Fri 8am-4:30pm CT.

A: That phone number they keep handing out just rings and rings. No one ever answers, they just hang up eventually.

A: Hello - Thank you for asking. Our Allergen Defense filters are made in Mexico. If you have any additional questions or concerns, please connect with our team directly at 1-800-3M-HELPS Mo-Fri 8am-4:30pm CT.

A: Hello. The higher the MPR number, the more filtration that filter will offer. If you have any additional questions or concerns, please connect with us directly at 1-800-388-3458 M-F 8am-4:30pm CT.

A: Hello - thank you for asking. These filters are designed for use up to 3 months.

A: Hello. Due to the technical nature of your question, please contact our team directly at 1-800-388-3458 M-F 8am-5pm CT so we can better assist you. Thank you.

A: Thank you for asking. This filter is a MERV 11.

A: This package contains two of the 14x30x1 inch filters.