Vent Termination Clearances - Superior DRT3535 Series Installation And Operation Instructions Manual

Innovative Hearth Products
Superior DRT/DRC3500 Series Direct-Vent Gas Fireplaces
TM

VENT TERMINATION CLEARANCES

These instructions should be used as a guideline and do not supersede local codes in any way. Install venting
according to local codes, these instructions, the current National Fuel Gas Code (ANSI Z223.1/NFPA 54) in the USA or
the current standards of CAN/CGA-B149.1 in Canada.
Vertical Vent Termination Clearances
Terminate multiple vent terminations according to the installation codes listed above and Figure 4.
Figure 3: 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 minimum
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 4: Horizontal Vent Termination Clearances
12"
(305 mm)
minimum
2 ft Vertical
minimum
wall
Lowest
discharge
opening
H*
X
12
Roof pitch is X/12
1" (25.4 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
Ventilated
Unventilated
soffit - 18"
soffit - 12"
(457 mm)
(305 mm)
6
*
(152)
Termination kit
6"
(153 mm)
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
Termination kit**
900298-00, 10/2014
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)
6"
**Use 6.5"
from center of
termination for
all horzontal
terminations
applicable
Installation
13