Honeywell 51370B Manal page 16

Venting continued-
THROUGH THE WALL VENTING: (HORIZONTAL VENTING WITH
STANDARD VENT TERMINALS).
Cut two 3 1/2 in. (8.9 cm) diameter holes in the wall at the point where the vent
connector is going to pass through the wall. Use the proper cement to secure
the 90° vent terminal provided with the water heater to the vent connector. The
distance between the edges of the 90° vent terminal and the exterior wall (see
Figure 3) must be 1 in. (2.5 cm). The exhaust and intake must not be less than
16" (40.6 cm) apart and the exhaust terminal must be a minimum of 3 in. higher
than the intake terminal (see figure 4a). Use the proper cement and assembly
procedures to secure the vent connector joints between the terminal and the
blower outlet. Provide support brackets for every 5 feet (1.5m) of horizontal
vent.
3" VENT INSTALLATION
4" VENT INSTALLATION
Figure 3
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