A door switch makes using your air curtain easy and efficient. By adding a door switch, your air curtain can turn on and off automatically when your door opens and closes.
The commercial, surface mounted reed switch is known for its sleek design. It comes with a 24V control and adjustable time delay. The time delay will keep your unit running for a configurable period of time, ranging from as little as 1 seconds up to 17 minutes. It is for use with 208 - 230 V Heated Air Curtains only.
Total Home Supply suggests that a switch is purchased with all air curtains.