DUCT CONSTRUCTION Clause Samples

DUCT CONSTRUCTION. 1. All ductwork shall be constructed as specified in "HVAC Duct Construction Standards" published by "Sheet Metal and Air Conditioning Contractors National Association, Inc." for positive or negative static pressures that meet the requirements of that portion of the system in which the ductwork is installed. a. All supply ductwork from the fan discharge to VAV Project No. C-0019 ADDENDUM NO. 1 15890-S or fan-powered box shall be constructed for positive pressures of 3" w. b. All branch supply ductwork from terminal unit to room outlet shall be constructed for positive pressures of 1" w.