York S1-MAC11202506. Also for Generalaire AC22, AC1, AC3, Carrier 31MF and Bryant 902BX Replacement Filter. Package of 2 Size 14x25x1 X8790 MERV 16 Size 20

X8790 MERV 16 Size 20 X 21 X 5

Used to determine when to change furnace filter by measuring airflow resistance

MERV 14 or 15 Rated (depending on shipment)

Actual Size of one Post-Filter is 20" x 12 1/2" x 3/8"

Failure to do so could result in serious injury from electrical shock and voids warranty due to possible product misapplication

York S1-MAC11202506. Also for Generalaire AC22, AC1, AC3, Carrier 31MF and Bryant 902BX Replacement Filter. Package of 2 Size 14x25x1 X8790 MERV 16 Size 20York Source1 Part # S1 MAC11202506 Replacement Media Filter For Generalaire AC22, AC1, AC3, Carrier 31MF and Bryant 902BX Package of 2