22
VENTING
SLIDE RESTRICTOR INTO EXHAUST PIPE ON TOP OF FIREPLACE WITH
TABS POINTING TOWARDS YOU PRIOR TO ATTACHING VENTING
Figure 7.1, Restrictor Assembly and Installation
RESTRICTOR
REMOVE CIRCLE TO
CREATE LESS RESTRICTON
BEND TABS TO APPROXIMATELY 80° ANGLES TO CREATE TENSION TO
HOLD ITSELF IN PLACE WHEN INSTALLED
7.2 Venting Requirements
Consult the local and national installation codes to assure
adequate combustion and ventilation air is available. Venting
requirements apply to both natural gas and LP gas.
• Flame height and appearance will vary depending upon
venting configuration and the type of fuel used.
• Refer to the vent manufacturer’s installation manual for
complete installation instructions. Vent installation must
conform with venting requirements and restrictions as
outlined in this manual.
• Provide a means for visually checking the vent connection to
the appliance after the fireplace is installed.
7.3 Approved 4” x 6⅝” Vent Systems
.
Vent Manufacturer Direct Vent System
Termination
American Metal
Products
Ameri-Vent
Horizontal & Vertical
BDM
Pro-Form
EXCEPT Snorkel
94040614
Horizontal & Vertical
ICC
EXCELDirect
Horizontal & Vertical
Kozy Heat
700 Series Flexible Vent
System
#923-F adapter required
Horizontal Only
Metal Fab
Direct Vent Chimney
Horizontal & Vertical
Selkirk
Direct Temp
Horizontal & Vertical
Simpson DuraVent DirectVent Pro
EXCEPT
Snorkel 46DVASNK14
Horizontal & Vertical
7.4 Vent Clearances
NOTE: Wall thimble products that comply with the required 1
in (25 mm) clearance to combustibles must be installed for all
horizontal vent runs that pass through interior or exterior walls.
These wall thimble products may be insulated using unfaced
insulation products listed as noncombustible per ASTM E 136.
NOTE: Attic insulation shields may be insulated using unfaced
insulation products listed as noncombustible per ASTM E 136.
Table 7.1, Horizontal Pipe Section Clearances
Surface
Top
Bottom
Sides
All Approved Venting
1 in (25 mm)
1 in (25 mm)
1 in (25 mm)
Table 7.2, Vertical Pipe Section Clearances
Surface
Sides
All Approved Venting
1 in (25 mm)
7.5 Use of Elbows
• MAXIMUM NUMBER OF 90° ELBOWS: 5
• For each 90° elbow used, 3 ft (91.4 cm) must be subtracted
from maximum venting allowed.
• For each 45° elbow used, 1½ ft (457 mm) must be
subtracted from maximum venting allowed.
• (2) 45° degree elbows may be used in place of (1) 90°
elbow.
7.6 Restrictor Assembly and Installation
A restrictor (included in components packet) may be used to
achieve desired flame appearance on any top venting configuration
with 6 ft (1.83 m) of vertical pipe or more. Section 11.2.3 Restrictor,
on page 36, outlines restrictor recommendations depending
on burner flame appearance, and instructions on installation after
venting is completed.
