retain the grease filters 34 36 the grease filters 34 36 include removable grease troughs 40 at a lower end adjacent the interior walls 26 28 and a handle 42 for aiding installation and removal preferably the grease filters 34 36 are ten inch ul listed baffle filters the lower bracket 48 includes the removable grease trough 40 which has a downwardly depending arm 64 mounting a u shaped channel 66 including an exterior face 68 extending at the same angle as the interior walls 26 28 below the removable grease troughs 40 extends a grease drain 90 which is a channel angled downwardly and including an end disposed above a grease cup 92 removably supported by the rear panel 14 thus as grease is removed by the filters 34 36 it drains from the filters to the removable grease troughs 40 which channel the grease to the grease drain 90 which lies below an end of the grease trough in turn the grease drain 90 channels the grease to the grease cup 92 which can be emptied by simply removing it from the rear panel 14 the grease troughs 40 may preferably be open at each of their ends and the grease drain 90 and the removable grease cup 92.