Now available in print or digital formats on the Sheet Metal and Air Conditioning Contractors' National Association bookstore website, the SMACNA HVAC Duct Construction Standards Manual, 4th edition, represents the state-of-the-art in sheet metal duct fabrication and installation.
The technical standards and manuals developed by SMACNA contractors have found worldwide acceptance by the construction industry and are an invaluable resource to metal and air conditioning contractors everywhere.
Key Changes to the SMACNA HVAC Duct Standards
One of the significant changes from the third edition is the addition of information on spray and aerosolized duct sealants.
Other changes the new edition of the SMACNA standards and manuals address include:
- Tables for spiral flat oval duct for positive and negative pressure applications
- Options for internal supports for a flat oval duct
- Updated requirements to include non-fiberglass liner types
- Added information for lined round industrial duct construction standards
- Added details for hangers to better illustrate where hangers are required
- Updated requirements for flex duct hanger spacing and hanger width
- Additional information for spiral fittings
Role in commercial building construction and remodeling
These new guidelines reflect the industry’s growing understanding of the major role duct leakage plays in overall building performance.
As a result, it is expected that sealing and HVAC air duct leakage testing will play an increasingly significant role in commercial building construction and remodeling.
