Intake and exhaust ducting (exhaust line runs inside of the larger diameter intake duct), wrapped in cloth insulation, must be 3' or less. Mine is probably about 2.75 ft at this location.
Intake and exhaust ducting (exhaust line runs inside of the larger diameter intake duct), wrapped in cloth insulation, must be 3' or less. Mine is probably about 2.75 ft at this location.