of filter means 34 39 is comprised of alternating triangular areas 100 and 102 the areas 100 are open and areas 102 are solid i e closed this insures that all air entering filter chamber 44 39 must pass through a filter element 48 39 before it can be drawn upward by the exhaust system like filter means 34 filter means 34 39 is mounted on wheels for easy changing of the filter elements 48 39 merely by rolling away one filter means 34 39 and rolling in another the booth 10 can be used for painting a new color there is no need to remove each individual filter element 48 39 and replace with a new one or one of another color the roll away filter means 34 39 has a back wall 56 39 and end walls 58 39 and 60 39 the roll away filter means 34 39 is sized so that it just fits into the booth 10 the distance between side walls 12 being just slightly greater than the width of the filter means from end wall 58 39 to 60 39 in order to insure that the top end of the filter elements 48 39 are in close proximity to the bottom end 42 of the velocity stacks 40 a pivoted and cammed lever arm 88 is provided the lever arm 88 is positioned to be accessible from the front side of the filter means 34 39 because access to the back and ends of the filter means 34 39 is severely restricted because of its close fitting relationship to booth 10 lever arm.