Monessen Hearth KHLDV400 - Manual (Page 18)

18 73D0024
KHLDV Series Gas Fireplace VentInG InStaLLatIOn
FP1183
max height
40' Maximum Height
12' Minimum Height
10'
Maximum
Support Straps
Every 3'
24" Min.
FP1183
VertIcaL (tHrOuGH-tHe-rOOF)
appLIcatIOnS
This gas fireplace has been approved for,
• Vertical installations up to 40' (12 m) in height. Up to a 10'
(3 m) horizontal vent run can be installed within the vent
system using a maximum of two 90° elbows. Figure 18
Figure 18 -
Support Straps for Horizontal Runs
• Up to two 45° elbows may be used within the horizontal
run. For each 45° elbow used on the horizontal plane, the
maximum horizontal length must be reduced by 18" (450
mm).
Example: Maximum horizontal length
No elbows = 10’ (3 m)
1x45° elbows = 8.5’ (2.6 m)
2x45° elbows = 7’ (2.1 m)
• A minimum of an 8' (2.5 m) vertical rise is required.
• Two sets of 45°elbows offsets may be used within the vertical
sections. From 0 to a maximum of 8' (2.5 m) of vent pipe
can be used between elbows. Figure 19
• The maximum angular variation allowed in the system is
270°. Figure 19
• The minimum height of the vent above the highest point of
penetration through the roof is 2' (610 mm).
example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
nOte: Horizontal sections of this vent system require a
minimum of 3" clearances to combustibles at the top of the
flue and 1" clearance at the sides and bottom until the flue
penetrates the outside wall. A minimum 1" clearance all around
the flue is acceptable at this point of penetration.
Vertical sections of this vent system require a minimum of 1"
clearance to combustibles on all sides of the pipe.
24" Min.
1
2
3
4
1
2
3
4
FP1179
max bends
Figure 19 -
Maximum Elbow Usage
FP1179