Kitchen Exhaust Cleaning, Swap Pillow, and KEC Hinge Kit Cleaning KEC Quarterly - System 1 - Main KEC Semi-Annual - System 2 - Prep Left KEC Semi-Annual - System 3 - Prep Right SWAPP Quarterly - Replace (1) Small GC Pillow - Main System KECHK One Time - Install (2) Super QF 18 Hinge Kits (Prep Systems - Left & Right)