Accumulair Carbon Odor Block 4-Inch Filter

• Carbon impregnated disposable pleated panel filters.
• Each filter lasts up to 3 months.
• Ideal applications include odors from cooking, new paint, new carpet, bathroom smells, cigarette smoke odor, pet odors.
• Can be installed in virtually any HVAC system without modifications.

Since my system is 18 years old and this size filter is no longer available at big box stores like Lowes, This was fast and easy to find and seems to be 100%.