Lennox RAVELLE 30 Installation And Operation Instructions Manual page 20

IMPORTANT NOTES:
1. All Ravelle™ 30 fireplace vertically terminated may only use 6-5/8"
x 4" Secure Vent™ direct-vent pipe by Security Chimneys™ or GS
direct-vent pipe by Dura-Vent
2. If the vent passes through a ceiling or floor, a firestop - Security
Chimneys part number SV4BF or Dura-Vent 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 10 for these clearances.
5. A maximum of either two 45-degree elbows or two 90-degree
elbows may be used. See Page 22 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 18 .
20
® .
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
2 FT MIN.
Discharge
Vent
Termination
H*
Storm Collar
Flashing
1 inch (25.4 mm) Minimum
Clearance to Combustibles
Concentric
*H = MINIMUM HEIGHT FROM ROOF TO
Vent Pipe
LOWEST DISCHARGE OPENING OF VENT
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1, 7.6
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
Figure 18
2 FT
Vertical
MIN.
Wall
Lowest
Opening
X
12
Roof Pitch is X/12
* 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