United States Stove BEC95 Manual Do Utilizador

6 

EC95

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.

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.

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2.
3.

4.

5.

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.