Hearthstone Quality Home Heating Products, Inc
® Green Mountain Insert 70 (Model 8450)
20
Liner Offset Adaptor
A liner offset adapter, sold separately, can also be
installed. This should only be installed if no other
option is possible and if the total height of the
fireplace and chimney is at least 20 feet. This kind
of adaptor is restricting the free flow of exhaust
gases and may result in smoke roll-out from the
insert when the door is open for reloading. When
installing a liner offset adapter, secure the three
brackets provided in the user manual on top of the
insert. The long end of the brackets must be
attached to the insert. Then, follow the instructions
in the manual provided with the liner offset adapter
kit.
Figure 16
– Offset Adaptor
M
INIMUM
C
HIMNEY
C
LEARANCES
The top of the chimney should be tall enough to be
above the air turbulence caused when wind blows
against the house and its roof. The chimney must
extend at least 1 m (3 ft.) above the highest point of
contact with the roof, and at least 60 cm (2 ft.)
higher than any roof line or obstacle within a
horizontal distance of 3 m (10 ft.).
Figure 17
– Min. Chimney Height 1
Figure 18
– Min. Chimney Height 2