Hvac Duct Construction Standards Pdf

For all ducts between the supply fan and variable volume control boxes and 1 250 pa w g.

Hvac duct construction standards pdf.

A comprehensive duct layout indicating sizes design airflows pressure class and routing of the duct system. Information required for duct construction. Most air conditioning and heating systems require some form of duct work to channel or direct the. The types of fittings to be used based on the designer s calculations of fitting losses i e square versus 45 entry taps conical versus straight taps etc.

10 9 standard duct sizes 32 11 0. If the designer does not designate pressure class for duct construction on the contract drawings the basis of compliance with the smacna hvac duct construction standards is as follows. T 25a 31 42 24 56 t d c. The types of fittings to be used based on the designer s calculations of fitting.

Duct construction reinforcement 20 9 1 duct sheet metal thickness 20 9 2 duct hanger spacing 21. Hvac duct construction standards metal and flexible third edition iii foreword this third edition of the smacna commercial metal and flexible duct construction standards is another in a long line dating from the 1950s. Event objectives gain solid understanding of how to construct duct in a resource efficient and sustainable manner that is compliant with smacna s hvac duct construction standard. This is the final session in a three part series.

Webinars hvac duct construction standards 103 round and oval duct hangers and casing construction. Ductwork design considerations 33. Information required for duct construction 1. 2 500 pa w g.

Smacna hvac duct construction standards metal and flexible third edition 2005. A quick overview of the changes is provided in the front of this manual. Hvac duct construction standards metal and flexible.