I am in the middle of insulating/air sealing and my garage including drywall as well. The attic space will have it's own O'hagin intake vents and a solar fan for exhaust. Climate = sunny and dry (LA), yet will remain an unconditioned space. Utilities = Two gas appliances (water heater and HVAC), each have their own vent pipe to the roof. Purpose = Will remain a garage where I will store cars and use for hobbies. The home was built in the 60's and has two foundation, aka suicide vents on the bottom and a single gable vent up top (below the new ceiling). My original plan was to seal these three vents, in order to keep the heat/cold out. Kinda pointless to insulate the garage if I keep these vents open. I understand that these might no longer be required by LADBS but now the garage is air sealed and "tight", would it still be in my best interest to close these up? Perhaps just leave the gable vent open? What about the fresh air needed for the gas appliances? Sorry for all the questions, but need to make a fast decision as we are currently in the midst of this renovation.