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Innovative Hearth Products
DRL6500 Linear Direct-Vent Gas Fireplaces
VENT TERMINATION CLEARANCES
The following vent termination figures and charts should be used. Any installation must conform with local codes or,
in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane
Installation Code, CAN/CGA-B149.1.
Vertical Vent Termination Clearances
Terminate multiple vent terminations according to the installation codes listed above and Figure 4.
Figure 4 - Multiple Terminations
Terminate single vent caps relative to building components according to Table 6 and Figure 4.
Table 6 - Termination Heights for Vents above Flat or Sloped Roofs (NFPA 54 / ANSI Z223.1)—Gas Vent Rule
Horizontal Overhang
2 FT MIN.
Vent
Termination
Storm Collar
Flashing
Concentric
Vent Pipe
Horizontal Vent Termination Clearances
The horizontal vent termination must have a minimum of 6" (152 mm) clearance to any overhead combustible
projection of 2-1/2" (64 mm) or less (Figure 5). For projections exceeding 2-1/2" (64 mm) (Figure 5). For additional
vent location restrictions refer to Table 7.
All horizontal terminations may be located as close as 6" (152mm) to any (non-combustible and combustible)
exterior sidewall. This distance may be decreased to 2" (51mm) for noncombustible exterior sidewalls with all
approved terminations (Table 21).
Figure 5 - Horizontal Vent Termination Clearances
Ventilated
(457 mm)
12"
(305 mm)
minimum
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
2 FT
Vertical
MIN.
Wall
Lowest
Discharge
Opening
H*
X
12
Roof Pitch is X/12
1" (26 mm) Minimum
Clearance to Combustibles
*H = MINIMUM HEIGHT FROM ROOF TO
LOWEST DISCHARGE OPENING OF VENT
Combustible projection
2-1/2" or less in length
Combustible projection
greater than 2-1/2" in length
soffit Unventilated
soffit
6
(152)
18"
12"
(305 mm)
Termination kit
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Roof Pitch
Flat to 6/12
6/12 to 7/12
7/12 to 8/12
8/12 to 9/12
9/12 to 10/12
10/12 to 11/12
11/12 to 12/12
12/12 to 14/12
14/12 to 16/12
16/12 to 18/12
18/12 to 20/12
20/12 to 21/12
6"
Termination kit
General Information
900077-00, 01/2018
Termination Height *
1.0 ft (0.3 m)
1.25 ft (0.38 m)
1.5 ft (0.46 m)
2.0 ft (0.61 m)
2.5 ft (0.76 m)
3.25 ft (0.99 m)
4.0 ft (1.22 m)
5.0 ft (1.52 m)
6.0 ft (1.83 m)
7.0 ft (2.13 m)
7.5 ft (2.29 m)
8.0 ft (2.44 m)
NOTE: See Figure 26 on
Page 32 for exterior wall
recess allowances for
horizontal termination.
13
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