Smacna Hvac Duct Construction Standards Table 5 1

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.

Smacna hvac duct construction standards table 5 1.

Duct over 120 inches. Hvac duct construction standards metal and flexible. Example 4 duct is 140 x 70 inches at negative 2 in. Duct over 120 inches.

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. 1966 3 rd edition 2005 396 pages. 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. A comprehensive duct layout indicating sizes design airflows pressure class and routing of the duct system.

A quick overview of the changes is provided in the front of this manual. The third edition of the hvac duct construction standards metal and flexible is intended primarily for commercial and institutional duct construction. For all ducts between the supply fan and variable volume control boxes and 1 250 pa w g. A comprehensive duct layout indicating.

The third edition of the hvac duct construction standards metal and flexible is intended primarily for commercial and institutional duct construction. For all other ducts of any application. Information required for duct construction 1. 2 500 pa w g.

This american national standard ansi smacna 006 2006 contains tables and details for constructing ductwork for to 10 wg positive and negative pressures. This edition improves upon the second edition with expanded pressure class tables.