Burnham CHG225 - Manual (Page 5)

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Table 4.2: Clearances From Vent Piping To Combustible Construction
TYPE OF VENT PIPE PIPE DIRECTION ENCLOSURE
MINIMUM CLEARANCE
TO COMBUSTIBLE
MATERIAL
BURNHAM AL29-4C
ALTERNATE:
HEAT FAB SAF-T VENT
PROTECH FASNSEAL
Z-FLEX Z-VENT III
FLEX-L STAR-34
VERTICAL OR
HORIZONTAL
AT LEAST ONE SIDE OPEN,
COMBUSTIBLE MATERIAL ON A
MAXIMUM OF THREE SIDES
1”
HORIZONTAL OR VERTICAL
WITH OFFSETS ENCLOSED ON ALL FOUR SIDES
2-1/2”
VERTICAL WITH NO OFFSETS
Figure 4.1: Clearances To Combustible Or non-combustible Material