Osburn OB04010K Installation And Operation Manual page 51

• For installations where more than one chimney is located in the same non-chase or within the same
area, we suggest that their terminations be separated by at least 16" (410 mm) horizontally, and 18"
(460 mm) vertically. This separation is to prevent smoke migrating from one chimney to another.
Note: The
HORIZON – Installation and Operation Manual
18"
457.2mm
16"
406.4mm
CHIMNEY: 12" (305 mm) MIN.
ABOVE ROOF FLASHING
RIDGE
chimney chase on the roof must be the same size as the
18"
457.2mm
16"
406.4mm
CHIMNEY
18"
457.21mm
flashing.
51