ORDINANCE NO.  8287

 

AN ORDINANCE OF THE CITY OF LAWRENCE, KANSAS AMENDING CHAPTER V, ARTICLES 3 AND 6 OF THE CODE OF THE CITY OF LAWRENCE, KANSAS, 2008 EDITION, AND AMENDMENTS THERETO, CONCERNING DOMESTIC CLOTHES DRYER VENTING.  

 

BE IT ORDAINED BY THE GOVERNING BODY OF THE CITY OF LAWRENCE, KANSAS:

 

Section 1.  Chapter V, Article 6, Section 5-604.5 of the Code of the City of Lawrence, Kansas, 2008 Edition, and amendments thereto, is hereby amended to read as follows:

 

5-604.5 Section 504.6 of the International Mechanical Code and the indicated subsections are amended to read as follows:

           

            504.6 Domestic clothes dryer ducts. Exhaust ducts for domestic clothes dryers shall be constructed of metal and shall have a smooth interior finish. The exhaust duct shall be a minimum nominal size of 4 inches (102 mm) in diameter. The entire exhaust system shall be supported and secured in place. The male end of the duct at overlapped duct joints shall extend in the direction of airflow. Clothes dryer transition ducts used to connect the appliance to the exhaust duct system shall be limited to single lengths not to exceed 8 feet (2438 mm) and shall be listed and labeled for the application. Transition ducts shall not be concealed within construction.

504.6.1 Maximum length. 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˝ 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.

                        Exception: In multi-family dwellings 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 code official, the maximum length of the exhaust duct, including any transition duct, shall be permitted to be in accordance with the dryer manufacturer’s installation instructions.  A placard shall be permanently affixed in the dryer area stating the length of the venting and number of bends.  Included on the placard shall be the following:  Warning: Any dryer installed must be installed in accordance with the dryer manufacturer’s installation instructions and be acceptable for the vent length indicated above.

 

Section 2.  Chapter V, Article 3, Section 5-313 of the Code of the City of Lawrence, Kansas, 2008 Edition, and amendments thereto, is hereby enacted to read as follows:

 

5-313.5 Section M1502.6 of the International Residential Code is hereby amended to read as follows:

 

M1502.6 Duct length.

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 (0.8 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 the dryer are provided to the building official, the maximum length of the exhaust duct, including   any transition duct, shall be permitted to be in accordance with the dryer    manufacturer’s installation instructions.

2.         Where large-radius 45-degree (0.8 rad) and 90-degree (1.6 rad) bends        are installed, determination of the equivalent length of clothes dryer       exhaust duct for each bend by engineering calculation in accordance             with the ASHRAE Fundamentals Handbook shall be permitted.

 

Section 3.  If any provision, clause, sentence or paragraph of this ordinance is found to unconstitutional or is otherwise held invalid by any court of competent jurisdiction, it shall not affect the validity of any remaining parts of this ordinance. 

 

Section 4.  This ordinance shall be in full force and take effect on and after its publication as provided by law.

 

 

 

                  Passed by the Governing Body this_____day of ____________, 2008

 

                                                                                    _________________

                                                                                    Michael Dever, Mayor

 

ATTEST:

 

____________________

Frank S. Reeb, City Clerk

 

Approved as to form and legality:

 

___________________________________

Toni Ramirez Wheeler, Director of Legal Services