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Re: dryer vent
Jeff,
Your over you limit on length here, not to mention the downward sloped part.
03 IRC:
M1501.3 Length limitation.
The maximum length of a clothes dryer exhaust duct shall not exceed 25 feet (7620 mm) from the dryer location to the wall or roof termination. The maximum length of the duct shall be reduced 2.5 feet (762 mm) for each 45-degree (0.79 rad) bend and 5 feet (1524 mm) for each 90-degree (1.6 rad) bend. The maximum length of the exhaust duct does not include the transition duct.
I count 26 feet with two 90's which would reduce your total length to 16 feet.
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