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Burnham FCM120 User Manual

Page 6

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6

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 VENT-

ING

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 VERTI-

CAL 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 OFF-

SETS

ENCLOSED ON ALL FOUR

SIDES

2-1/2”