The SMACNA HVAC Duct Construction Standards - Metal and Flexible is the definitive, industry-recognized benchmark for the design, fabrication, and installation of commercial and residential metal and flexible air duct systems. Published by the Sheet Metal and Air Conditioning Contractors' National Association (SMACNA), this manual provides detailed engineering performance criteria, construction options, and structural support details across various static pressure classes. It serves as an essential reference for sheet metal contractors, mechanical designers, field installers, and candidates preparing for state trade licensing examinations.
 
Key Features
Duct Fabrication & Materials: Specifications for rectangular, round, and flat oval metal ductwork, including sheet metal gauges, joint connections, seam types, and stiffener spacing.
Pressure & Air Leakage Standards: In-depth tables and structural schedules tailored for positive and negative static pressure classes from -10 to +10 inches water gage (w.g.).
Flexible Duct & Hanger Support: Comprehensive requirements for flexible duct installations, maximum sag allowances, connection details, and hanger spacing/sizing schedules.
Specialized Fittings & Accessories: Architectural-grade details for elbows, transitions, branch connections, access doors, volume dampers, and fire/smoke damper installations.
 
HVAC Duct Construction Standards - Metal and Flexible (SMACNA)  is used on Florida's CMC (Certified Mechanical Contractor) and CAC (Class A & B Certified Air Conditioning Contractor) licensing exams. Brand new mint condition, current editions used on the exam at the time of purchase. Pre-Tabbed options available for Quick Navigation.