8
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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, and the current (USA)
National Fuel Gas Code ANSI-Z223.1 / NFPA
54, or (Canada) CAN/CGA-B149.1 standards.
Horizontal Vent Termination Clearances
The horizontal vent termination must have
a minimum of 3" (76 mm) clearance to any
overhead combustible projection of 2-1/2" (64
mm) or less (see
Figure 3
)
.
For projections
exceeding 2-1/2" (64 mm), see
Figure 3
. For
additional vent location restrictions refer to
Figure 4 on Page 9
.
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1
Roof Pitch
* Feet
* Meters
Flat to 6/12
1.0
0.3
6/12 to 7/12
1.25
0.38
7/12 to 8/12
1.5
0.46
8/12 to 9/12
2.0
0.61
9/12 to 10/12
2.5
0.76
10/12 to 11/12
3.25
0.99
11/12 to 12/12
4.0
1.22
12/12 to 14/12
5.0
1.52
14/12 to 16/12
6.0
1.83
16/12 to 18/12
7.0
2.13
18/12 to 20/12
7.5
2.29
20/12 to 21/12
8.0
2.44
The vent / air intake termination clearances
above the high side of an angled roof is as
shown in the following chart:
12
X
Roof Pitch is X/12
2 FT
MIN.
2 FT MIN.
Lowest
Discharge
Opening
H*
*H = MINIMUM HEIGHT FROM ROOF TO
LOWEST DISCHARGE OPENING OF VENT
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
Vertical
Wall
Vent
Termination
Storm Collar
Concentric
Vent Pipe
Flashing
1” (25.4 mm) Minimum
Clearance to Combustibles
Vertical Vent Termination Clearances
Figure 4
INNOVATIVE HEARTH PRODUCTS • POWER VENT DV GAS FIREPLACES (DRT6340/45TYN) • INSTALLATION INSTRUCTIONS
See Figure 19 on Page 19 for the re-
cess allowances, into exterior walls,
of the power vent terminations.
Combustible Projection
2-1/2" or less in length
Combustible Projection
Greater than 2-1/2" in length
Ventilated or
Unventilated Soffit
3".
(76 mm)
24"
(610 mm)
Power Vent Termination
Side Elevation View
Figure 3 - Horizontal Vent Termination Clearances
Combustible
18"
(457 mm)
