20
VENTING
7.0 VENTING
7.1 Approved 5” x 8” Vent Systems
Vent Manufacturer Direct Vent System
Termination
American Metal
Products
Ameri-Vent
Horizontal & Vertical
BDM
Pro-Form
Horizontal & Vertical
ICC
EXCELDirect
Horizontal & Vertical
Metal Fab
Direct Vent Chimney
Horizontal & Vertical
Security
Direct Vent Chimney
Horizontal & Vertical
Selkirk
Direct Temp
Horizontal & Vertical
Simpson DuraVent DirectVent Pro
Horizontal & Vertical
RLH Industries
Direct Vent Chimney
Horizontal & Vertical
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.
7.2.1 Vent Section Clearances
Table 7.1, Vertical Pipe Section Clearances
Surface
Sides
All Approved Venting
1 in (25 mm)
Table 7.2, Horizontal Pipe Section Clearances
Surface
Top
Bottom
Sides
All Approved Venting
3 in (76 mm)
1 in (25 mm)
1 in (25 mm)
7.2.2 Wall Pass-Through
Kozy Heat’s #800-WPT series, or wall thimble products that
comply with the required 3 in (76 mm) top clearance to
combustibles, must be installed for all horizontal 5” x 8” 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.
Wall Thickness ......................................................... Part Number
4½ in (114 mm) to 6½ in (165 mm) ................................ #800-WPT
6½ in (165 mm) to 12½ in (318 mm) ............................#800-WPT2
7½ in (191 mm) to 12 in (305 mm) ...............................#800-WPT3
7.3 Use of Elbows
• For each additional 90° elbow used after the first elbow, 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.
7.4 Restrictor Assembly and Installation
A restrictor (included in components packet) may be used to
achieve desired flame appearance on any venting configuration
with 6 ft (1.83 m) of vertical pipe or more. Section 12.2.2 Restrictor
on page 25 outlines restrictor recommendations depending on
burner flame appearance, and instructions on installation after
venting is completed.
SLIDE RESTRICTOR INTO EXHAUST PIPE
ON TOP OF FIREPLACE WITH TABS FACING
TOWARDS YOU PRIOR TO ATTACHING VENTING
Figure 7.1, Restrictor Assembly and Installation
RESTRICTOR PLATE
BEND TABS TO APPROXIMATELY 80° ANGLES TO CREATE TENSION
TO HOLD ITSELF IN PLACE WHEN INSTALLED
REMOVE CIRCLE TO
CREATE LESS RESTRICTON
