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LENNOX HEARTH PRODUCTS • MONTEBELLO
VENT FIGURES
Notes:
• Secure Vent™ components (rigid vent pipe and terminal) are shown in the Figures.
• Two 45 degree elbows may be used in place of one 90 degree elbow.
• SV4.5VF (Secure Vent) firestop/spacer must be used anytime vent pipe passes through a combustible floor or ceiling. SV4.5HF (Secure Vent)
firestop/spacer must be used anytime vent pipe passes through a combustible wall.
• It is very important that the horizontal/inclined run be maintained in a straight (no dips), slightly elevated plane. The recommended incline
is approximately 1/4" per foot (20 mm per meter) horizontal, in a direction away from the fireplace. The rise per foot run ratios that are smaller
are acceptable all the way down to at or near level.
Power Vent
Termination
SV4.5L 6 / 12 / 24 / 36 / 48
Exterior
Wall
Figure 16 - Typical Power Vent Routing
POWER VENT VENTING ChART
Maximum Number Of Elbows
Maximum Feet Of Run
Minimum horizontal Run
Minimum Vertical Run
Maximum Vertical Rise
MINIMUM CLEARANCES TO COMBUSTIBLES
Vertical Vent Pipe
horizontal Vent Pipe
Figure 17
POWER VENT DV GAS FIREPLACES (LSM40/45EN-PV) • INSTALLATION INSTRUCTIONS
®
horizontal / Inclined Run
Vent Sections
Maximum horizontal
-
6
A + B
110 feet
B
10 feet
Adaptor Plus 4 Feet Vertical
A
Vent (Min.) and 90° Elbow
66 feet
A
1.0 in. (25.4 mm)
Top - 3.0 in. (76.2 mm)
Sides - 1.0 in. (25.4 mm)
Bottom - 1.0 in. (25.4 mm)
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Support
Brackets
Ceiling
Firestop / Spacer
Probe Adaptor
(required)
Venting 110 Feet.
Up to 6 Elbows
Floor
A
(See Chart)
Building
Support
Framing
SV4.5E90
Elbow
Minimum
Vent Run
horizontal
10 Feet
Vertical Rise
66 Feet Max.
4 Feet Min.
Probe Adaptor
(required)
Fireplace
B
Probe Adaptor
(Required)
Exterior
Wall
Power Vent
Termination
15
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