NH is no longer pending adoption of the 2015 NFPA 54. Stay tuned for announcement as to what code book may become law. The PVC venting amendment has also “sunsetted” into history and is no longer in effect. Licensed installers are now required to consult the NFPA-54 and manufacturer’s installation instructions. On the heels of recent decisions in Massachusetts, NH mechanical board continues to ponder the fate of PVC used as a gas appliance venting material.