Originally Posted by johnbomb
Don't be the least bit sorry- this is the perfect place for this topic. In fact, I'm considering building something similar to what you have in mind.
When you say "exhausting from the theater into adjacent room", how does the air ultimately get back to the rec room, which is the air supply room for the HT, right? If it doesn't, or if you don't somehow "close the loop", then you will have a pressure imbalance...