IRC Chapter 16 addresses Duct Systems for these areas, but getting the installation right, including joints, seams, duct laps, duct lengths and even choosing the correct UL - Listed sealants can be daunting...not to mention potential construction code changes every 3 years! This video will help sort out some details and increase your chances of passing inspection the first time! And below the video, you'll find a code reference cheat sheet.
IRC Chapter 16: Duct Systems
IRC Chapter - 16 Duct Systems pdf