Fan Speed Control, With Programmable Timer, Voltage 120, Max Amps 2.5, Max Wattage 300, Height 2 1/2 In, Width 1 3/4 In, Depth 1 In, Fits Standard Single Gang Electrical Box, For Use With Fantech Fans to Meet Whole-house Ventilation Requirement Per ASHRAE Standard 62.2, Includes Selectable Minutes Per Hour on Time and Slide Speed Control Adjustment with 20 Minute Overide Centrifugal In-Line Duct FansPrewired fans have lower sound levels than comparable surface-mounted fans. Max. temp.: 140 F. Mounting bracket included.All are UL and C-UL Listed.Mount: horizontally or vertically Bearings: ball Speed controls, designer grilles, and dampers sold separately, this pageFan ControlsProgrammable 300W Fan Speed Control 2GKG4 provides 0 to 60 min./hr. run time at any speed from 0 to 100%. Auxiliary Fan Control 2GKG5 is used with 2GKG4 to control ventilation from up to 3 additional locations. Each has a 20-min. speed boost and 20-min. override, and fits a standard single-gang electrical box. For Fantech fans only.Meet ASHRAE Standard 62.2. CSA Certified to U.S. Standards.