Old Suburban Furnace had an exchanger that was leaking Cabon Monoxide. (Made the sensor scream)
This is an upside down view of the furnace plenum. There is a rectangular takeoff on either side. The ducting is connected through adaptors. This allows for a snug fit in the galley cabinet and the ducts to run below the drawers, and shelves. The ducts also run under the couch.
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