Crown Boiler BWC151 Installation Instructions Manual page 7

Table 4.2: Clearances From Vent Piping To Combustible Construction
TYPE OF VENT PIPE
80/125 and 60/100mm
CONCENTRIC VENTING
HEAT FAB SAF-T VENT
PROTECH FASNSEAL
Z-FLEX Z-VENT III
METAL-FAB CORR/GUARD
HEAT FAB SAF-T VENT
PROTECH FASNSEAL
Z-FLEX Z-VENT III
METAL-FAB CORR/GUARD
HEAT FAB SAF-T VENT
PROTECH FASNSEAL
Z-FLEX Z-VENT III
METAL-FAB CORR/GUARD
PIPE DIRECTION
VERTICAL OR
HORIZONTAL
VERTICAL OR
HORIZONTAL
HORIZONTAL OR VERTICAL
WITH OFFSETS
VERTICAL WITH NO OFFSETS
ENCLOSURE
ENCLOSED ON ALL FOUR SIDES
AT LEAST ONE SIDE OPEN,
COMBUSTIBLE MATERIAL ON A
MAXIMUM OF THREE SIDES
ENCLOSED ON ALL FOUR SIDES
ENCLOSED ON ALL FOUR SIDES
5
MINIMUM CLEARANCE
TO COMBUSTIBLE
MATERIAL
0"
1"
2-1/2"
2-1/2"