can a 140 sq inc duct be installed at the filter on a 70000 but oil furnace

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Old 12-09-19, 11:00 AM
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can a 140 sq inc duct be installed at the filter on a 70000 but oil furnace

international comfort product. model -NOMF155E19B
 
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Old 12-09-19, 12:57 PM
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Only if you have two of them.
 
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Old 12-09-19, 09:21 PM
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Welcome to the forums.

A very vague title and question.
Do you mean a return duct ?
 
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