I have a attic/central air conditioner that is not sending cold air to
one ceiling vent. I checked all of the vents with the thermometer and
the temperature ranges from 62 F - 70 F. The temperature reads 80 at
the problem vent. There is a strong flow of air out of this vent, as
strong as the others. It is insulated in a similar way to the other
pipes that service the vents, only it is just a couple of feet longer
than the rest. I detect no air leakage.in the system. I opened up
the "box" that all of the pipes connect to and although it is dirty in
there, the air is 60 F and is flowing to all of the pipes. The inside
air filter is new.
Why is one vent performing worse than the rest?
Because it is picking up more heat somewhere along the line. This can
happen if the air flow is slower (less total volume of air per cross area of
I suspect that in fact it is not as well insulated as it should be. In
fact I suspect the others are not as well insulated as they should be as
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