The LG 21.8 cu. ft. French Door Refrigerator features the Smart Cooling system, which reacts quickly to temperature fluctuations and maintain superior conditions. The Linear Compressor works to stabilize temperatures when there are fluctuations. This refrigerator includes 4 split SpillProtector Glass shelves, 2 humidity controlled drawers and a glide n' serve drawer that stores wide items easily. Fresher is better. Smart Cooling® system is designed to maintain superior conditions within the refrigerator. The Linear Compressor reacts quickly to temperature fluctuations and helps keep your food fresher, longer. Meanwhile, strategically-placed vents in every section surround your food with cool air no matter where you put it. Peace of Mind When you buy a refrigerator, you don't want to worry that it won't last. Because the Linear Compressor uses fewer moving parts and operates more efficiently, LG confidently backs the Linear Compressor with a 10-year limited warranty. Get wise If you ever experience an issue with your LG refrigerator, you don't have to worry. The SmartDiagnosis™ feature helps the service center diagnose problems over the phone, or with a simple app on your smart phone, helping you minimize costly, inconvenient service calls. Save money. Save energy. This refrigerator uses at least 15% less energy than required by federal standards making it our most energy efficient fridge and a positive impact on your energy bill and your energy consumption.