Ashley BEC95 Installation & Operation Manual - Page 6

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Ashley BEC95 Installation & Operation Manual

There are ﬁ ve allowable ways that a chimney connector can be connected to a masonry chimney by passing

through a combustible wall. NFPA Standard 211 allows the following wall pass-through systems.

This room heater must be connected to a chimney complying with the requirements for Type HT chimneys

in the Standard for Chimneys, Factory-Built, Residential Type and Building Heating Appliance, UL 103,or a

code-approved masonry chimney with a ﬂ ue liner.

1. Use a minimum 3-1/2" thick brick masonry wall framed into the combustible wall. A ﬁ reclay liner (ASTM C315

or equivalent) having a 5/8" minimum wall thickness must be used and it must be at least 12" away from any

material that could catch ﬁ re. The inside diameter of the ﬁ reclay liner shall be sized for the proper snug ﬁ t of a

6" diameter chimney con nector pipe. The ﬁ reclay liner shall run from the outer surface of the brick wall to, but

not beyond, the inner surface of the chimney ﬂ ue and shall be ﬁ rmly cemented in place. S

2. Use a solid insulated listed factory-built chimney length having an inside diameter of 6" and having 1" or more

of solid insulation. There must be at least a 9" air space between the outer wall of the chimney length and

any combustible materials. The inner end of the chimney length shall be ﬂ ush with the inside of the masonry

chimney ﬂ ue shall be sealed to the ﬂ ue and to the brick masonry penetration with nonwater-soluble refractory

cement. Sheet steel supports which are at least 24 gauge(0.024") in thickness shall be securely fastened to wall

surfaces on all sides. Fasteners between supports and the chimney length shall not penetrate the chimney liner.

3. Use a 10" diameter ventilated thimble made of at least 24 gauge(0.024") steel having two 1" air channels. The

ventilated thimble must be separated from combustible materials by a minimum of 6" glass ﬁ ber insulation. The

opening in the combustible wall shall be covered and the thimble supported with sheet steel supports which are

at least 24 gauge (0.024") in thickness. The sheet steel supports shall be securely fastened to wall surfaces

on all sides and shall be sized to ﬁ t and hold the chimney section. Fasteners used to secure chimney sections

shall not penetrate chimney ﬂ ue liner.

4. Use an 8" inside diameter solid insulated listed factory-built chimney length which has 1" or more of solid in-

sulation. The minimum length of this chimney section shall be 12" and will serve as a pass-through for the 6"

diameter chimney connector. There must be at least a 12" air space between the outer wall of the chimney

section and any combustible materials. The chimney section shall be concentric with and spaced 1" away

from the chimney connector by means of sheet steel support plates on both ends of the chimney section. The

opening in the combustible wall shall be covered and the chimney section supported on both sides with sheet

steel supports which are at least 24 gauge (0.024") in thickness. The sheet steel supports shall be securely

fastened to wall surfaces on all sides and shall be sized to ﬁ t and hold the chimney section. Fasteners used

to secure chimney sections shall not penetrate chimney ﬂ ue liner. See Part C of Figure 7.

5. A listed factory-built wall pass-through system may be purchased and installed according to the instructions

packaged with it to provide a safe method of passing the chimney connector through a combustible wall for

connection to a masonry chimney.

Additional requirements pertaining to Figure 5 and the above wall pass-through systems:

Insulation material used as part of wall pass-through system shall be of noncombustible material and shall have a thermal

conductivity of 1.0 Btu • in./ft.² • °F (4.88 kg • cal/hr • m² • °C) or less

All clearances and thicknesses are minimums: larger clearances and thickness are acceptable.

A chimney thimble, as shown for 3" and 4" above (Parts C and D respectively of Figure 7) shall be for types "3" and "4"

connections to facilitate removal of the chimney connector for cleaning. The chimney thimble shall be of ASTM C315

ﬁ reclay with 5/8" minimum wall thickness , or material or equivalent durability. The inside diameter of the thimble shall

be sized for the proper snug ﬁ t of a 6" diameter chimney connector pipe. The thimble shall be installed without damage

to the chimney ﬂ ue. The thimble shall extend through the chimney wall to, but not beyond, the inner surface of the

chimney ﬂ ue and shall be permanently cemented in place with high temperature cement.

A chimney connector to a masonry chimney, except for 2" above (Part B of Figure 7), shall extend through the wall pass-

through system to the inner face of the chimney ﬂ ue, but not beyond. It does not have to be fastened in place so long

as it cannot accidently be pulled out of the chimney or shoved into the chimney ﬂ ue. If fasteners are used to secure the

chimney connector to a masonry chimney, the fasteners shall not penetrate the chimney ﬂ ue liner.

Any material used to close up any opening for the connector shall be noncombustible.

If the chimney connector does not have to pass through a combustible wall to get to a masonry chimney, connect the chimney

connector to the masonry chimney as shown in ﬁ gure 8. The ﬁ reclay liner shown by ﬁ gure 8 should be sized for the proper

snug ﬁ t of a 6" diameter chimney connector pipe. The ﬁ reclay liner should be ﬁ rmly cemented in place as shown. As previ-

ously stated, any metal prefabricated chimney this heater is connected to must be a listed Hi-Temp Type HT Factory Built

Residential Type and Building Heating Appliance Chimney.

When a metal prefabricated chimney is used, the manufacturer's installation instructions must be followed precisely. You

must also purchase (from the same manufacturer) and install the ceiling support package or wall pass through and "T" section

package, ﬁ restops (when needed), insulation shield, roof ﬂ ashing, chimney cap, etc. Maintain the proper clearance to the

structure as recommended by the manufacturer. This clearance is usually a minimum of 2 inches, although it may vary by

manufacturer or for certain components.

EC95