by arearcher » Thu Jul 27, 2017 6:16 pm
Take my comments with a grain of salt since I failed...but:
1. Can your rigid duct go over the return air grille you have drawn in the conference room?
4. Take a look at the NCARB example in the exam guide. They're got their diffusers and return grilles intermixed and not at opposite ends of the room like you've got shown. I'm not sure if that's ok.
Edit: Removed two comments I made that were incorrect. Sorry.