Desa H) AND VM42EP(B Owner's Operation And Installation Manual page 10

Maintain
Listed
Clearance
8'
12' Min.
Position
Firestop
EXAMPLE 1
The flue connection must be made using listed
B-type connectors and the existing system must be
code inspected for damage and proper installation.
It is not recommended that this appliance be com-
mon vented with an existing gas burning appliance.
However, if it becomes necessary to common vent
this appliance, the venting system must be sized
and configured in accordance with the common
venting guides Appendix G of the current National
Fuel Gas Code ANSI Z223.1/NFPA 54 and in
Canada with CAN/CGA B149.
Note: Before connecting this appliance to an
existing vent system or a common venting sys-
tem consult with your local architect, planner or
building official.
WARNING: This appliance
must be properly connected
to a system and must not be
connected to a chimney flue
servicing a separate solid fuel
burning appliance.
10
VENTING INSTALLATION
Listed
Vent Cap
Maintain
Listed
Clearance
Support Each
Lateral At
Least Every
Six (6) Feet
60
6'
Position
Firestop
Maintain
Listed
Clearance
Figure 10 - Typical B-Vent Configuration
www.desatech.com
Continued
Listed
Vent Cap
Maintain
Listed
Clearance
45
12' Min.
45
Maintain
Listed
Clearance
EXAMPLE 2
Lowest
Listed
Discharge
Vent Cap
Opening
Listed Gas
Vent
H (Min)
Height
From Roof
Roof Pitch
Flat to 6/12
6/12 to 7/12
Over 7/12 to 8/12
Over 8/12 to 9/12
Over 9/12 to 10/12
Over 10/12 to 11/12
Over 11/12 to 12/12
Over 12/12 to 14/12
Over 14/12 to 16/12
Over 16/12 to 18/12
Over 18/12 to 20/12
Over 20/12 to 21/12
Figure 11 - B-Vent Terminations
Listed
Vent Cap
45
10'
Position
Firestop
Maintain
Listed
Clearance
EXAMPLE 3
8 Ft. Min.
x
12
H (Min.)
Ft.
1.0
1.25
1.5
2.0
2.5
3.25
4.0
5.0
6.0
7.0
7.5
8.0
Maintain
Listed
Clearance
12' Min.
Roof Pitch x/12
Listed Clearance
m
0.30
0.38
0.46
0.61
0.76
0.99
1.22
1.52
1.83
2.13
2.27
2.44
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