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Originally Posted by Bird  Jim, I guess it's possible that there's a leak in the ductwork, but I don't see how that could have happened since no one has been up there except me or that service man and I was there watching what he did. This house has the round flexible type ducts in the attic, and very deep (a foot or more) insulation up there. I go up once a month and put just a little bleach in the condensation drain, and yes, it's hotter'n hades up there. |
I was thinking of the flex-ducts not being insulated enough when it gets really hot. The air at 59 degrees might only be 75 degrees by the time it reaches the register in your rooms. If that is not the case, then the ducting is probably just fine. Don't your ducts run above the attic insulation? Or are they covered in addition to having internal insulation? That's the kind of thing you would see on a really hot day like the ones we have been having. Thermal gain/cooling loss due to insufficient insulation in the ducting is a remote possibility. It also should be easily measurable with a thermometer check near the evaporator and another at the farthest point of the duct or where the air enters the room. Just a thought. . . .