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Old 01-08-2019, 09:13 PM   #9
MARK A
Montana Master
 
Join Date: Jan 2016
Location: STAYTON
Posts: 1,118
M.O.C. #18157
The return grates under the stairs aren’t ducted to the furnace in any way manner or form. They are only there to let air out of the trailer when the furnace is running. Otherwise the furnace would pressurize the cabin and the furnace would stop moving air.

Mark
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