Empire Comfort Systems INTERMITTENT PILOT DVCD36FP70 Installation Instructions Manual page 21

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.
H1
FIRESTOP AT
CEILING LEVEL
SEE GRAPH FOR PERMISSIBLE "H" AND "V" DIMENSIONS
NOTE: H1 AND H2 MUST BE ADDED TOGETHER TO USE CHART
38712-2-0719
VENTING FIREPLACE - TOP (CONT'D)
H2
V
figure 33
hard elboW dimensions (inches)
fireplace
series
a
dvcd32fP 41-1/2
dvcd36fP 41-1/2
dvcd42fP 43-1/2
fleX pipe 90 degree bend
fireplace
series
a
dvcd32fP 43
dvcd36fP 43
dvcd42fP 45
minimum hole location dimensions for through the wall horizontal
installations with 90 degree elbow off top of fireplace.
D
C
B
C
B
A
CENTER OF ELBOW
STRAIGHT OUT
(MINIMUM)
b c
4-1/2 6-1/2
4-1/2 6-1/2
4-1/2 6-1/2
dimensions (inches)
b c
4-1/2 6-1/2
4-1/2 6-1/2
4-1/2 6-1/2
figure 34
d
9-1/8
9 1/8
9 1/8
d
9-1/8
9-1/8
9-1/8
Page 21