HVAC For New Home with Theater Room
We are in the process of cleaning up the HVAC in the basement before the drywall etc go up. One part of the basement is going to be the theater room. It will be 18ft long by 12'7" wide roughly. There will be no windows in it, and one door leading to the rest of the basement. We are doing some things to keep the sound in the room like putting roxul in the walls and the ceiling, and using the hat channel and clips on the ceiling and wall connecting to the rest of the basement, and using 5/8" drywall. The HVAC guy said that we can only use duct insulation and dampening material in the cold air return, the circular heating vents we can't. So then the talk came up do we need heat or cold air return in that room. We live in Canada and the theater room is going to be in the basement, the other part of the basement will have a gas or electric fireplace to do the heating plus the usual registers.
The only equipment in the theater room will be the projector and subwoofer and speakers, the audio is a rack on the other side of the basement.
I am concerned that it might be too hot or cold or stuffy. The door will normally be open when the room is not in use.
What are people's thoughts ?