03/04
35048 Rev L
7
IB75 B-VENT GAS APPLIANCE
E. VENTING
Note:
This appliance requires an 8 in. B-vent for operation. Never down-size
1.Clearances
Vent clearances are per vent manufacturers
specifications.
2.Vent Lengths
Various venting configurations are shown in Figures 5
and 6 from which maximum vent runs can be
determined.
WARNING - RISK OF FIRE!
Always maintain minimum clearances or greater
around the vent system. Do not pack air spaces with
insulation or other material.
Figure 6 - Venting off the Top of the Appliance
Figure 5 - Vertical Termination Vent Lengths
3.Firestop Spacer/Vent Installation
Frame an opening and install a firestop spacer
whenever the vent penetrates a ceiling/floor area, as
shown in Figure 7. Frame the opening with the same
sized lumber as used in the ceiling/floor joists. Unless
the flue is offset, the hole should be directly above the
appliance. DO NOT pack insulation around the vent.
Assemble vent sections as per manufacturers
specifications.
Figure 7 - Installing the Firestop Spacer