At what temperature does it enter the supply trunk and the return?Post created: 2013-03-12 Type of Equipment: Furnace Views: 114
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I am monitoring the plenum temperature as it enters the supply trunk, and the temperature of the return just before it enters the furnace. The salesman said there should not be more that a 50 to 60 degree difference between the two. My question at what temperature does it enters and the temperature of the returns?