GeneralAire 12758 - 17" x 28" x 6" RESERVEPro (#4001) Expandable Air Filter, MERV 11, OEM filter.

This GeneralAire air filter has MERV 11 filtration and traps airborne particles as small as 1.0 micron. This replacement filter is for the GeneralAire AC21 and AC22 Air Cleaners.

GeneralAire recommends you replace this air filter every 12 months to achieve the best results.

• MERV 11 
• Fits: GeneralAire® AC1, AC22
• Fits: Bryant 902BX; Carrier 31MF020, 31MF120; Source 1 S1-MAC11202506, S1-FM11202506
• Micro Fiber
• Expandable

If you have any questions regarding this product please feel free to email Sales@DiscountFurnaceFilter.com or call 1-888-623-4678 and one of our knowledgeable Customer Service Representatives will be happy to help.