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 quick overview of the changes is provided in the front of this manual. 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. Information required for duct construction 1.

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. The types of fittings to be used based on the designer s calculations of fitting. A comprehensive duct layout indicating sizes design airflows pressure class and routing of the duct system. T 25a 31 42 24 56 t d c.

Ductwork design considerations 33. Information required for duct construction. 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. Webinars hvac duct construction standards 103 round and oval duct hangers and casing construction.

Hvac duct construction standards metal and flexible. 10 9 standard duct sizes 32 11 0. Duct construction reinforcement 20 9 1 duct sheet metal thickness 20 9 2 duct hanger spacing 21. This is the final session in a three part series.

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. Duct size duct gauge joint length wide side connector narrow side connector 0 12 26 59 flat slip t 6 24 ga flat drive t 1 24 ga 13 18 26 59 standing slip t 11 26 ga flat drive t 1 24 ga 19 30 26 56 t d c. A comprehensive duct layout indicating sizes design airflows pressure class and routing of the duct system.