WHEN THE DOOR IS OPEN

Control apparatus, namely, a programmable electronic controller for controlling operation of an air control apparatus, such as an air door or air curtain for use at an entrance doorway of a refrigerated, air conditioned and/or heated room and/or building; downloadable software in the nature of a mobile application for controlling an air control apparatus, such as an air door or air curtain for use at an entrance doorway of a refrigerated, air conditioned and/or heated room and/or building

Air doors and air curtains for use at an entrance doorway of a refrigerated, air conditioned and/or heated room and/or building