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Innovative Hearth Products
DRT63ST Direct-Vent Gas Fireplaces
VENT TERMINATION
CLEARANCES
These instructions should be used as a guide-
line 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) in the USA or the cur-
rent standards of CAN/CGA-B149.1 in Canada.
Vertical Vent Termination Clearances
Terminate multiple vent terminations accord-
ing to the installation codes listed above. Also
see Figure 3.
Terminate single vent caps relative to building
components as shown in Figure 4.
12"
(305 mm)
minimum
Figure 3 - Multiple Terminations
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
2 FT
MIN.
2 FT MIN.
Lowest
Discharge
Vent
Opening
Termination
H*
Storm Collar
Flashing
1" (25.4 mm) Minimum
Clearance to Combustibles
Concentric
*H = MINIMUM HEIGHT FROM ROOF TO
Vent Pipe
LOWEST DISCHARGE OPENING OF VENT
*H = minimum height from roof to lowest
discharge opening of vent.
Figure 4 - Vertical Vent Termination Clearances
Horizontal Vent Termination Clearances
The horizontal vent termination must have a minimum of 3" (77 mm) clearance to any overhead
combustible projection of 2-1/2" (64 mm) or less (see Figure 5). For projections exceeding 2-1/2"
(64 mm), see Figure 5. For additional vent location restrictions refer to Figure 6 on Page 12.
Combustible
Projection
extending more
than 2-1/2"
24"
(610 mm)
Horizontal Termination Kit
Horizontal Vent Termination Clearances
For recess allowances of horizontal termination into exterior walls,
see Figure 31 on Page 25.
Figure 5
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Vent/air intake termination clearances
above the high side of an angled roof
are listed in the table below.
Vertical
Termination Heights for Vents
Wall
Above Flat or Sloped Roofs
(Ref. NFPA 54 / ANSI Z223.1)
Roof Pitch
Flat to 6/12
6/12 to 7/12
X
7/12 to 8/12
12
Roof Pitch is X/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
Combustible
Projection
extending up
to 2-1/2"
3"
(76 mm)
Side Elevation View
Ventilated or Unventilated Soffit
General Information
900355-01, 01/2020
*Feet
*Meters
1.0
0.3
1.25
0.38
1.5
0.46
2.0
0.61
2.5
0.76
3.25
0.99
4.0
1.22
5.0
1.52
6.0
1.83
7.0
2.13
7.5
2.29
8.0
2.44
11
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