Minimum duct temperature

Hi. Can anyone tell me the ballpark minimum duct discharge temperature to avoid draughts in a ducted air system?
thanks
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That would be room temperature. The temperature of the room the ducts are suspended.
Its always like that, until the air gets moving. Gravity flow would best best in this respect.
I think yo meant minimum furnace discharge temperature !!!! Thats set set by the computer or thermostat.
Sorry, there is always drafts.
To get more of what your trying ask, there is probably some chart to use for CFM vs Temp comfort zone.
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