Sheet metal & Air Conditioning Contractors’ National Association


HVAC Duct Construction Standards, Metal and Flexible 4th Edition 45-Day ANSI Review

The 45-Day ANSI Review draft of the HVAC-DCS, Fourth Edition, is available. The standard contains prescriptive application tables for the fabrication and installation of rectangular, round, oval, and flexible duct for positive or negative pressures up to 10 inches water gage (2500 Pa). The standard also includes requirements for duct liner, hangers, tie rods, joints, leakage & seal classes, and accessories. 

To request a copy of the draft, please complete this form.

Note: Single copy price is $100.00

Comment Deadline: October 15, 2018