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// CODE SNIPPET

Section 2112 Masonry Heaters

Building Code 2021 of Illinois > 21 Masonry > 2112 Masonry Heaters
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2112.1 Definition

A masonry heater is a heating appliance constructed of concrete or solid masonry, hereinafter referred to as "masonry," which is designed to absorb and store heat from a solid fuel fire built in the firebox by routing the exhaust gases through internal heat exchange channels in which the flow path downstream of the firebox includes flow in either a horizontal or downward direction before entering the chimney and which delivers heat by radiation from the masonry surface of the heater.

2112.2 Installation

Masonry heaters shall be installed in accordance with this section and comply with one of the following:
  1. Masonry heaters shall comply with the requirements of ASTM E1602.
  2. Masonry heaters shall be listed and labeled in accordance with UL 1482 or EN 15250 and installed in accordance with the manufacturer's instructions.

2112.3 Footings and Foundation

The firebox floor of a masonry heater shall be a minimum thickness of 4 inches (102 mm) of noncombustible material and be supported on a noncombustible footing and foundation in accordance with Section 2113.2.

2112.4 Seismic Reinforcing

In structures assigned to Seismic Design Category D, E or F, masonry heaters shall be anchored to the masonry foundation in accordance with Section 2113.3. Seismic reinforcing shall not be required within the body of a masonry heater with a height that is equal to or less than 3.5 times its body width and where the masonry chimney serving the heater is not supported by the body of the heater. Where the masonry chimney shares a common wall with the facing of the masonry heater, the chimney portion of the structure shall be reinforced in accordance with Section 2113.

2112.5 Masonry Heater Clearance

Combustible materials shall not be placed within 36 inches (914 mm) or the distance of the allowed reduction method from the outside surface of a masonry heater in accordance with NFPA 211, Section 12.6, 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. Where the masonry heater wall thickness is not less than 8 inches (203 mm) of solid masonry and the wall thickness of the heat exchange channels is not less than 5 inches (127 mm) of solid masonry, combustible materials shall not be placed within 4 inches (102 mm) of the outside surface of a masonry heater. A clearance of not less than 8 inches (203 mm) 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 or EN 15250 and installed in accordance with the manufacturer's instructions.

Related Code Sections


Section 2112 Masonry, Masonry Heaters
A masonry heater is a heating appliance constructed of concrete or solid masonry , hereinafter referred to as "masonry," which is designed to absorb ...
Building Code 2021 of Illinois > 21 Masonry > 2112 Masonry Heaters
Section 2112 Masonry, Masonry Heaters
A masonry heater is a heating appliance constructed of concrete or solid masonry, hereinafter referred to as "masonry," which is designed to absorb ...
Building Code 2018 of Illinois > 21 Masonry > 2112 Masonry Heaters
2112.2 Masonry, Installation
Masonry heaters shall be installed in accordance with this section and comply with one of the following: Masonry heaters shall comply ...
Building Code 2018 of Illinois > 21 Masonry > 2112 Masonry Heaters > 2112.2 Installation
2112.3 Masonry, Footings and Foundation
The firebox floor of a masonry heater shall be a minimum thickness of 4 inches (102 mm) of noncombustible material and be supported ...
Building Code 2021 of Illinois > 21 Masonry > 2112 Masonry Heaters > 2112.3 Footings and Foundation
2112.3 Masonry, Footings and Foundation
The firebox floor of a masonry heater shall be a minimum thickness of 4 inches (102 mm) of noncombustible material and be supported ...
Building Code 2018 of Illinois > 21 Masonry > 2112 Masonry Heaters > 2112.3 Footings and Foundation
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