IBC SL 28-160 Installation And Operating Instructions Manual page 16

SL 28-160 MODULATING GAS BOILER
Figure 12: Allowed SST installation orientations
Figure 13: Pipes extend completely through the wall (Vertical orientation shown).
Figure 14: Minimum separation for multiple vent installation, vertical orientation
Figure 15: Minimum separations for multiple vent installation, horizontal orientation
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INSTALLATION AND OPERATION INSTRUCTIONS