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LENNOX HEARTH PRODUCTS • MONTEBELLO
VENT FIGURES
Notes:
• Secure Vent
components (rigid vent pipe and terminal) are shown.
®
• Two 45° elbows may be used in place of one 90° 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.
• Maintain the horizontal/inclined run in a straight, slightly elevated plane—approximately 1/4 in. per foot (20 mm per meter)—in a direction
away from the fireplace. Smaller rise per foot run ratios are acceptable, down to at or near level. Use a carpenter's level to measure from a
constant surface and adjust the support straps as necessary.
Power Vent
Termination
SV4.5L 6 / 12 / 24 / 36 / 48
Exterior
Wall
Figure 16: Typical Power Vent Routing
Maximum Number Of Elbows
Maximum Feet Of Run
Minimum Horizontal Run
Minimum Vertical Run
Maximum Vertical Rise
Table 15: Power Venting
Vertical Vent Pipe
Horizontal Vent Pipe
Table 16: Minimum Clearance to Combustibles
DLX POWER VENT DV GAS FIREPLACES (MDLX40/45IN-PV) • INSTALLATION INSTRUCTIONS
®
Horizontal / Inclined Run
Vent Sections
Maximum Horizontal
Venting Can Run Up To
3 ft Below Unit
—
6
A + B
110 ft
B
10 ft
Adaptor Plus 4 ft Vertical Vent
A
(min.) and 90° Elbow
A
66 ft
1.0 in. (25.4 mm)
Top—3 in. (76.2 mm)
Sides—1 in. (25.4 mm)
Bottom—1 in. (25.4 mm)
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Support
Brackets
Ceiling
Firestop / Spacer
Probe Adaptor
(required)
Venting 110 ft
Up to 6 Elbows
Floor
A
(See Chart)
Figure 17: Power Vent Routing with Probe Adaptor
Building
Support
Framing
SV4.5E90
Elbow
Minimum
Vent Run
Horizontal
10 ft
Vertical Rise
66 ft max.
4 ft min.
Probe Adaptor
(required)
Fireplace
B
Probe Adaptor
(Required)
Exterior
Wall
Power Vent
Termination
15
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