I leave in Florida. Need to condition a room nd the only practical way is to run a duct from the garage wall (separating the living room) to the room in question. I know that that wall is a fire wall and need protection. But can the Florida Mechanical Code allow for a duct to run thru the garage?
Call a reputable local HVAC company to do the work, and file for permits to make sure you are meeting the applicable local codes and safety requirements. Anything else is basically just a guess at what your local requirements are and the propper way to complete the work.
Of course I do for krist sake. That was an assummed statement that if you have on on the entrance, you have one on the exit.
But one will be lucky to find a 26 gauge duct if at all. I am lucky to find drywall separations up here. Only on new construction do I see it.
I would also like to see a smoke activated damper if that were used anyways.
Doubt if I will ever see one.
Considering the duct insulation, the framing, drywall, fire taping. Yes cheaper to have a damper activated by a heat detector since the smoke detector would not work due to car exhaust.