Bosch 125HX LP - Manual (Page 3)

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MINIMUM INSTALLATION CLEARANCES FROM COMBUSTIBLE AND NON
COMBUSTIBLE MATERIALS FOR ALCOVE OR CLOSET INSTALLATIONS
FRONT VIEW SIDE VIEW
AQUASTAR MODEL 125HX
MODEL 125 HX
TOP (A) 12"
FRONT (B) 4"
BACK 0"
SIDES 4"
FLOOR (C) 12" *
VENT DIAMETER 5"
* Some local codes require 18” in garage installations