Heated 11 In.H 48 In.W 17.5 In.D Stel Air Curtain, For Frame Opening Width 4 ft, Mounting Height for Temperature Control 12 ft, Overall Depth 17 1/2 in, Overall Height 10 5/8 in, Overall Width 48 in, Profile Type Standard Profile, Heated/Not Heated Heated, Maximum Air Velocity 3,855 fpm, Mounting Height for Insect Control 10 ft, Maximum Air Volume 1,442 cfm, Nameplate Voltage 208V AC, Air Temperature Rise 33 Degrees F, Sound Level @ 10 ft 66 dBA, Housing Color Black, Phase 1