Smacna Hvac Duct Construction Standards Table 5 1

Example 4 duct is 140 x 70 inches at negative 2 in.

Smacna hvac duct construction standards table 5 1.

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

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 sizes design airflows pressure class and routing of the duct system. Duct over 120 inches.

Information required for duct construction 1. Duct over 120 inches. 2 500 pa w g. 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.

A comprehensive duct layout indicating. For all other ducts of any application. Figure 2 13 in hvac dcs use standard tables for sizes 120 in. The third edition of the hvac duct construction standards metal and flexible is intended primarily for commercial and institutional duct construction.

Information required for duct construction. This american national standard ansi smacna 006 2006 contains tables and details for constructing ductwork for to 10 wg positive and negative pressures.