Air Flow Switch Paddle Size 2-1/8 in x 6-7/8 In. Full Load Amps @ 115/230V 16.0/8.0 Switch Type SPDT Max Air Velocity 2000 fpm Min Actuation Velocity Horizontal 500 fpm (greater than 50 sq. in duct area) Min Actuation Velocity Vertical 750 fpm (greater than 50 sq. in duct area) Overall Height 4 In. Overall Width 2-3/4 In. Overall Depth 2-5/8 In. Max Ambient Temp 104 Degrees F Mounting Location Top Side or Bottom of a Duct