Sub-Zero's all new Integration refrigeration lineup offers the most-advanced food-preservation features and the widest range of sizes of any brand. The Sub-Zero IC-24R (the first 24" all-refrigerator column from Sub-Zero) provides 12.9 cubic feet of storage, with a built-in antimicrobial air-purification system based on technology developed by NASA. This system scrubs the air of ethylene gas - an organic compound emitted by produce that hastens food spoilage - as well as mold, viruses and bacteria every 20 minutes. Another advanced food-preservation feature is the high-humidity, lower-temperature crisper drawers, which provide the perfect conditions for storing fresh produce. A patented door-seal system efficiently locks in cold air, while touchscreen technology allows you to precisely control temperatures and provides more access to more settings.