THAN 6 FEET ABOVE THE FLOOR. 8. THE MAXIMUM LENGTH OF A CLOTHES DRYER EXHAUST SHALL NOT EXCEED 25 FEET FROM THE DRYER LOCATION TO THE WALL OR 4. THE WATER SUPPLY RISER FROM THE SHOWER VALVE TO THE WH 30 GALLON WATER HEATER ROOF TERMINATION. THE MAXIMUM LENGTH OF THE DUCT SHALL BE REDUCED 2.5 FEET FOR EACH