A: It depends on how high you want to hang the screen. If you are planning on a high ceiling or in-ceiling installation, use a product with an extra black masking border like E24 (24" drop) or E30 (30" drop) model. Aside from that, our general product lines will accommodate your typical home or commercial presentation room ceiling heights.  All of our manual and electric screens are suitable for wall or ceiling installations  All of our electric wall/ceiling screens have adjustable vertical limit switches to help you achieve the perfect drop setting.