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Page 21
VENTING FIREPLACE - TOP (CONT’D)
Example of possible venting systems using two 90° elbows.
V is listed as minimum vertical dimensions and H1 + H2 is listed
as total of maximum horizontal dimensions. The maximum
vertical and horizontal distances for two 90° elbows as shown in
Figure 33 is 20 feet (6.1 m).
Attention: Refer to Figure 30 for additional venting requirements.
FIRESTOP AT
CEILING LEVEL
SEE GRAPH FOR PERMISSIBLE “H” AND “V” DIMENSIONS
NOTE: H1 AND H2 MUST BE ADDED TOGETHER TO USE CHART
V
H2
H1
figure 33
B
C
A
CENTER OF ELBOW
STRAIGHT OUT
(MINIMUM)
D
C
B
fireplace
series
hard elboW dimensions (inches)
a
b
c
d
dvcd32fP
41-1/2
4-1/2
6-1/2
9-1/8
dvcd36fP
41-1/2
4-1/2
6-1/2
9 1/8
dvcd42fP
43-1/2
4-1/2
6-1/2
9 1/8
fireplace
series
fleX pipe 90 degree bend
dimensions (inches)
a
b
c
d
dvcd32fP
43
4-1/2
6-1/2
9-1/8
dvcd36fP
43
4-1/2
6-1/2
9-1/8
dvcd42fP
45
4-1/2
6-1/2
9-1/8
minimum hole location dimensions for through the wall horizontal
installations with 90 degree elbow off top of fireplace.
figure 34