You are viewing an archived code
The maximum length of a clothes dryer exhaust duct shall not exceed 25 feet (7620 mm) from the dryer location to the outlet terminal. 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
Exceptions:
1. Where the make and model of the clothes dryer to be installed is known and the manufacturer's installation instructions for such dryer are provided to the Building Commissioner, the maximum length of the exhaust duct may exceed 25 feet, including any transition duct, provided it is in accordance with the dryer manufacturer's installation instructions.
2. Where a central engineered exhaust dryer system is used.