Appendix A. Sizing and capacities of gas piping (IFGS)
Appendix B. Sizing of venting systems serving appliances equipped with draft hoods, category I appliances, and appliances listed for use and type B vents (IFGS)
Appendix C. Exit terminals of mechanical draft and direct-vent venting systems (IFGS)
Appendix D. Recommended procedure for safety inspection of an existing appliance installation (IFGS)
