Originally Posted by bqmeister
While the answer today certainly depends on what size screen he has and more importantly what projector he gets, he's looking to do wiring once. The projector he buys now will most likely not be the projector he's using in 5 years. And the projector he buys in 5 years will most likely not be used in 10 years.
IMO, it's crazy to install a ceiling outlet for a specific projector's throw distance as the next projector's throw distance could be completely different.
What I did in my situation is install one outlet 10 feet back and another outlet 15 feet back. I figured with this setup, I could easily install any projector with a throw distance of anywhere from 7 feet to 18 feet with at most a 3 foot cord run on the ceiling. I really doubt the panny ax100 I have today will be the same projector I'm running 3 years from now. Probably even within 2 years I'll have upgraded. I fully expect to continue using my outlet at 15 feet back, but if I find a great projector with a really short throw, I'm ready.
bqmeister is of course correct. However, the trend is definitely towards
more flexibility in installations with larger zoom ranges. Moreover, the size of screen you want will be important in where you put the outlets. If you go
with a recessed screen (electric or pulldown) you won't likely want to change it often. Given the size of your room, if the budget allows for a 1080p pj ($3K-6K provides lots of choice) then you could easily go with a 120" + screen which would work well with you seating. Any of the main contenders could be placed from 15' to 20' from the screen and this will almost surely be true of many future pj's. If you want a smaller screen such as a 92" you will want to move everything closer. There are many 720p pj's that could also work for this size if you are not
too sensitive to screen door effect.
You mention that this is not a dedicated space. Will it have good light control?
This will also impact the size (and type) of screen you get.
You don't have to know the exact pj and screen you want before
doing the wiring but it would help to have a ballpark idea.
Remember, you also have to plan on getting video to the pj so this
should also be done while you have access.