Feng Shui is the Chinese art of aesthetic furniture and room arrangements, and has, as a primary focus, the aesthetic purpose and utility of a room. When making your TV viewing room, you should focus on several aspects of the space itself to determine the proper height and positioning of your flat screen TV.
Viewing Angle and Height
Viewing distance, per Crutchfield Electronics, is one-and-a-half to two-and-a-half times the diagonal dimension of your television set. Thus, for a 36-inch TV, you'll want the couch anywhere from 54 inches to 90 inches back from the screen. The optimum viewing angle should be measured from the eye height of the person sitting on the couch; by and large, you want the television set at a height where the middle of the vertical field of view is at the eye height of the person on the couch. For typical couches with a seat height between 24 and 30 inches, this usually means a TV height where the top of the screen is at about five to six feet from the floor, but this is fairly subjective.
Mounting Hardware and Other Concerns
When setting up your TV, especially the larger models, mount them on the wall – use a stud-finder to locate the wall studs before putting the mounting brackets in. For platform or stand-based TVs, try to set them on furniture that gives the visual height recommended earlier, and make sure that the furniture can support the weight.