15
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
IMPORTANT NOTES:
1) All Ravelle™ 30 fireplace vertically terminated vent installations use 6-
5/8” x 4” Security™ Secure Vent™ or Simpson Dura-Vent GS pipe.
2) If the vent passes through a ceiling or floor, a firestop - Security part
number SV4BF or Simpson part number 963 – is required.
3) If the vent passes through the roof, a roof flashing and storm collar
are required.
4) Allowable clearances from the vent pipe to combustible materials must
be maintained. See
Page 6
for these clearances.
5) A maximum of either two 45-degree elbows or two 90-degree elbows
may be used. See
Page 17
for allowable offsets.
6) The maximum system height is 30 feet (9.1M) and the minimum is
10 feet (3M).
Vertical Vent Termination Clearances
The vent / air intake termination clearances above the high side of an
angled roof is as shown in the
Figure 17
.
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z3.1, 7.6
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
1
X
Roof Pitch is X/1
FT
MIN.
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 inch (5.4 mm) Minimum
Clearance to Combustibles
Figure 17
