Duracraft AC-818 Humidifier Filter Pad

The AC-818, also known as the HC-818 and BestAir D19-C, is available in a convenient 3-pack. These filters provide superior performance and offer a high output of moisture. The honeycomb filtration design traps mineral pollutants, preventing them from entering your air. Approximate size is 8" x 9" x 2". Recommended change is at the beginning of the season or every two (2) months, depending on usage.