Its county seat is San Antonio, the second-most populous city in Texas and the seventh-largest city in the United States. Bexar County is included in the San Antonio-New Braunfels, TX metropolitan statistical area. Bexar county includes Government Canyon state natural area in northwestern part of the county.
If the screen width is 7 feet and the projector's throw ratio is 2.0 - 2.4:1 (because projectors have zoom lenses, they also have a range of throw ratios) then you can place your projector anywhere from 14 to 16.8 feet away from the screen.
Hereâs a quick rule of thumb: expect a low-frequency EMF from a source within your house to extend 3 feet in all directions, unless you know otherwise. (Donât forget, this radiation goes through walls too.). So keep three feet away from electrical wiring and appliances, where possible. (It is not always possible.