As with all of NZXT"s cases, Lexa S is designed for enhanced airflow with capability for 5 fans including 120mm fans on the front, side, and exhaust with a 140 mm fan on top. NZXT includes the side, rear, top, and front fans along with a fan controller that controls dual intakes and exhausts independently and effectively optimizes your computers performance based on your preference for pure power or whisper quiet operation