A The best way to do it is to make sure the screen's diagonal size matches the distance to you first row of seating.  There is not set standard size for a room, just consider the seating location of you and your guests.  Your material should allow everyone to comfortably sit and watch without craning their necks back or shifting their eyes from side to side. 

A Despite its good looks, a curved projection screen plays a valuable role in today’s home theaters. Residential cinemas are more commonly featuring the same wide “Cinemascope” screen format as one would watch when actually at a movie theater.  It has an aesthetic appeal that draws in the viewer by enhancing a sense of immersion while enhancing resolution and brightness. The curved screen, together with the anamorphic accessories will increase brightness and enhance resolution by up to 30%.The curve design ensures that light travels the same distance to reach any point of the screen thus creating a properly proportioned image. 

A Tubular motors run faster and have a greater lift capacity. Synchronous motors are slower but are also quieter and more energy efficient.  Since synchronous motors are smaller, they also have less torque, so we only use them in our smaller standard priced models. Synchronized motor or tubular motor for choose, the biggest size of Synchronized motor is 150".