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The following information has been provided by Da-Lite.
The rule of thumb is to fit the projection screen to the audience and not the projector. Da-Lite recommends the following formula for determining projection screens size:
Screen height should be approximately equal to 1/6 the distance from the screen to the last row of seats, allowing text to be read and detail to be seen in the projected image.
The bottom of the screen should be a minimum of 4 feet above the audience floor, allowing those seated toward the rear of the audience to see the screen. This may require additional screen "drop" (material height) for ceiling mounted screens.
Note: Please use this information as a base point from which to choose the right screen height. We generally find that most customers prefer 3 feet off the finished floor to the bottom of the screen, and some screens are not necessarily installed all the way to the ceiling.
Please call us with any questions. We are here to help you choose the right projection screen for your application.
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