Section 408.30437. Masonry heater clearance.

Rule 437.  Section 2112.5 of the code is amended to read as follows:

2112.5. Masonry heater clearance. Combustible materials shall not be placed within 36 inches (914 mm) of the outside surface of a masonry heater in accordance with NFPA 211-2010 chapter 12, paragraph 12.6 (clearances for solid-fuel-burning appliances), and the required space between the heater and combustible material shall be fully vented to permit the free flow of air around all heater surfaces.

Exceptions:

1.        When the masonry heater wall thickness is at least 8 inches thick of solid masonry and the wall thickness of the heat exchange channels is at least 5 inches thick of solid masonry, combustible materials shall not be placed within 4 inches of the outside surface of a masonry heater. A clearance of at least 8 inches shall be provided between the gas-tight capping slab of the heater and a combustible ceiling.

2.     Masonry heaters listed and labeled in accordance with UL 1482 and installed in accordance with the manufacturer’s instructions.

History:   1988 AACS; 1992 AACS; 1995 AACS; 2001 AACS; 2004 AACS; 2008 AACS; 2010