If I had to guess...what she is referring to as "TUBING" is the dryer exhaust hose (but would this cost $60??), and "the house is oval" is the metal exhaust duct in her wall is oval not round like the exhaust hose.
This connection could be problematic but a good installer would place the hose over the duct and seal it with duct tape.
Houses that have their dryer exhaust rise 12-15 feet and exit on the roof should have this duct work cleaned out every 1-2 years. You would be amazed how much lint accumulates in the metal rise to the roof......Potential fire hazard.
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