that bay contained the chase for the ductwork for the gas burner. here it gets a little different, it seems the bay was used as the duct, as only 2 sheets of metal ductwork were found after the backdraft. Talking to contractors, it wasnt uncommon to use the wood ceiling joists to act as the channel or ductwork. they blocked off the end of 2 bays with sheetmetal pieces to direct it upstairs. they put 2 sheets the length of the bay on the bottom to act as the 4th side.
That system was common years ago for the return duct for a hot air system only.
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Posted · Edited by xfirefighter484x
That system was common years ago for the return duct for a hot air system only.