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Bosch 660 EF User Manual page 13

Indoor model/ natural gas/lp gas boilers
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Installation instructions
Clearance Requirements from Vent Terminations to Building Openings
*All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1
and in Canada, in accordance with NSCNGPIC.
Fig. 8
6 720 644 063



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