Kitchen Exhaust Cleaning and Swap Pillow Cleaning KEC Every Other Month - System 1 - Main Left KEC Every Other Month - System 2 - Main Right SWAPP Every Other Month - Replace (2) Small GC Pillows Deficiency: needs hinge kit base of fan 28 by 28inch top of duct is 26 by 32 1/2inch Deficiency: need hinge kit fan base is 28 by 28inch top of duct is 26 by 26 inch Deficiency: needs new hinge kit current hinge not strong enough for fan base bends