LHAD-36: 36" air curtain with electric heat. Air Curtains > LHAD Series (With Electric Heat) > LHAD-36 Air Curtain Model Supply Voltage Heater Watts (kW) Amps Total Unit Control Box Location* Slave Control Box Unit Wt. (lbs) Sound Power (dBA) LHAD-36 208V/60Hz/1ph 240V/60Hz/1ph 480V/60Hz/3ph 4.5, 6....