The plenum and ceiling walls of the air handler are assembled. A connection to the new duct system is shown. This duct acts as another passage way to the existing systems. Instead of building a larger panel and plenum system this will suffice. It is a value engineered judgment to tie in to the existing system.
Shown here is the 100 by 46 inch duct work. Its acts as a extended plenum, it is hung with half inch all thread and 2x2x1/25 inch angle iron. It has been fabricated in the shop in 4ft joints. They are connected together by a ductmate gasket system. It will hold 8inches wg for pressure testing.
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