Kitchen Exhaust Cleaning and Swap Pillow Cleaning KEC 9x per year - System 1 April/May/June/July/August/September/October/December/March KEC 9x per year - System 2 April/May/June/July/August/September/October/December/March SWAPP 9x per year - Replace (2) Small Pillows April/May/June/July/August/September/October/December/March