I am doing my research before I talk to HVAC contractors.
As you can see from the image above, I have a furnace and a hot water boiler at one end of the unfinished basement area. It has exterior walls on all the three sides. I would like to have the home theater in the tan colored area. I plan to use a classic room-within-room construct as much as possible for sound management. The problem is that this means that air flow/ventilation to the furnnace and the boiler is now obstructed as they are in a sealed room.
I read that it is really not a good idea to feed exterior air to the furnaces. (I am in the northeast USA). So, I am contemplating running an additional duct (colored in yellow in the diagram) from the adjoining laundry room to the furnace room. I read that I need 1 sq inch of ventilation per 1000 BTU. I may be able to do that. Is this a good idea ? Are there any other options for me ?
Another thing, to allow for maintenance and access, I plan to have a 36x80 solid core access door on the screen wall. Is that going to be sufficient ? Any critiques of my plan ? Suggestions on what should I be asking the HVAC guys ?