Smacna Duct Construction Standards Table 4 1

A comprehensive duct layout indicating.

Smacna duct construction standards table 4 1.

Information required for duct construction. 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. Example 4 duct is 140 x 70 inches at negative 2 in. A comprehensive duct layout indicating sizes design airflows pressure class and routing of the duct system.

The research also led to the development of the smacna hvac air duct leakage test manual 1st edition. Disclaimer of warranties a the sheet metal and air conditioning contractor s national association smacna provides its product for informational. Smacna members will receive an email shortly with instructions on how to receive their gratis copy. Smacna cad standard second edition v notice to users of this publication 1.

For all ducts between the supply fan and variable volume control boxes and 1 250 pa w g. Duct over 120 inches. Hvac duct construction standards metal and flexible. 2 hvac duct construction standards metal and flexible 1st edition 1985 hvac duct construction standard metal and flexible 2nd edition 1995 and the current smacna duct construction standard hvac duct construction standards metal and flexible 3rd edition 2005.

Information required for duct construction 1. For all other ducts of any application. Use standard tables for sizes 120 in. The revised round industrial duct construction standards 3rd edition 2013 an american national standard ansi smacna 005 2013 is now available.

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. The scenarios for the app are limited to joint lengths of 4 5 and 6 feet.