Properlymaintaining the air purification system in your Sub-Zero refrigerator ensures that it will scrub the air of mold, viruses and bacteria — contaminants too small for conventional filters — and lessen the ethylene gas that hastens food spoilage.
Based on NASA Technology, the Sub-Zero refrigerator air purification cartridge scrub the air every 20 minutes to ensure freshness! The old part # was 7007067 and the new part number is 7042798. They are the same unit and will fit the same refrigerators.