National Fuel Gas Code Handbook
In addition to the complete NFPA 54, this hardback beauty includes formal interpretations, and commentary, printed in blue. The commentary provides history and background for specific paragraphs in the code. In other words, it explains the reason behind the requirements. A very USER-FRIENDLY code book at last! Part Two includes five supplements dealing with CSST, procedures to estimate infiltration rates, development of revised venting guidelines and more. Important changes include: new limits on the use of alternative methods for sizing chimneys and gas vents, new requirements for combustion air, revised requirements for pressure testing, new exception dealing with altitude derating, and more. I've got some serious reading ahead of me now. Get your hands on one of these ASAP." And I couldn't agree more!