Talk:Sheet Metal and Air Conditioning Contractors' National Association

Latest comment: 15 years ago by 219.91.185.180 in topic Ducting standards

Ducting standards edit

give the detail regarding SMACNA standard for ducting. What is the sizes and guage and joint combination?— Preceding unsigned comment added by ‎219.91.185.180 (talk) 00:21, 14 July 2008 (UTC)Reply