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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
60/100mm
CONCENTRIC VENTING
VERTICAL OR
HORIZONTAL
ENCLOSED ON ALL FOUR SIDES 0”
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”
HEAT FAB SAF-T VENT
PROTECH FASNSEAL
Z-FLEX Z-VENT III
FLEX-L STAR-34
HORIZONTAL OR VERTICAL
WITH OFFSETS
ENCLOSED ON ALL FOUR SIDES
2-1/2”
HEAT FAB SAF-T VENT
PROTECH FASNSEAL
Z-FLEX Z-VENT III
FLEX-L STAR-34
VERTICAL WITH NO OFFSETS ENCLOSED ON ALL FOUR SIDES
2-1/2”