Smacna Duct Construction Standards Table 4 1

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.

Smacna duct construction standards table 4 1.

Duct over 120 inches. A comprehensive duct layout indicating. Duct over 120 inches. For all ducts between the supply fan and variable volume control boxes and 1 250 pa w g.

The research also led to the development of the smacna hvac air duct leakage test manual 1st edition. For all other ducts of any application. 2 500 pa w g. The scenarios for the app are limited to joint lengths of 4 5 and 6 feet.

Example 4 duct is 140 x 70 inches at negative 2 in. 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. Use standard tables for sizes 120 in. 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.

Hvac duct construction standards metal and flexible. The app will provide smacna compliant options for rectangular duct with dimensions from 1 inch to 120 inches for applications from negative to positive ten inch water gage. Smacna members will receive an email shortly with instructions on how to receive their gratis copy. The revised round industrial duct construction standards 3rd edition 2013 an american national standard ansi smacna 005 2013 is now available.

Smacna cad standard second edition v notice to users of this publication 1. Information required for duct construction.