I converted the rear section of the garage into a laundry room with a wall newly constructed to divide the laundry from the rest of the garage. This wall needs to be a fire rated wall. I am required to put HVAC register in the laundry since it will be considered habitable space. The air handler is in the garage very close to this wall. It would be a simple matter to run a duct from the air handler through this wall into the laundry. Can I put the duct through the wall and still maintain the fire rating? Any suggestions what I would do if I cannot put a duct through this wall?