35-DVRS31NB(N)-2
18
R
ise
P
itch
Installation Instructions Cont.
Through Roof Framing
Use a suitable round or square support through
the roof. Ensure adequate heat shield protection
is provided. See diagram and chart for minimum
protection.
Pitch
Rise (in/ft)
Rise (m)
0/12
-
6/12
12”(1
ft)
.30m
7/12
-
9/12
18”(1.5
ft)
.46m
10/12
-
12/12
24”(2
ft)
.61m
13/12
-
16/12
36”(3
ft)
.91m
17/12
-
24/12
48”(4
ft)
1.22m
Fig 18
-
A
When passing through a flat ceiling, install a Box/Wall thimble. Cut a
10”
square hole and frame as shown in the diagram
below.
Fig 18
-
B
N O T E
ALWAYS CHECK YOUR LOCAL CODES BEFORE INSTALLING VENTING. CLEARANCES, ETC, MAY
VARY FROM STATE TO STATE(PROVINCE TO PROVINCE).
