What is the maximum length of exhaust duct I can use for this dryer?
The maximum length of 4-inch diameter rigid metal duct is 65 feet (19.8 m) with zero 90-degree elbows, or 55 feet (16.8 m) with one 90-degree elbow. If the duct is too long, it must be repaired or vented elsewhere. Exceeding these lengths can result in poor dryer performance. (Page 2)
From the official Kenmore 796.79278010 Dryer manual, page 2
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