Hearthstone Quality Home Heating Products, Inc
® Green Mountain Insert 70 (Model 8450)
24
The insert's blower assembly is equipped with a heat
sensor. Therefore, you can leave the switch in the
automatic position (3). The blower will start
automatically when the insert is hot enough and it
will stop when the insert has cooled down. You can
also set the switch to the manual position (1) to
operate the blower at any time. Select the position
(2) to manually stop the blower.
Figure 23
– Air Control
Figure 24
– Air Control
C
HOOSING
F
IREWOOD
Burn only natural firewood (known as cordwood) in
the Green Mountain Insert 70 Model 8450 Wood
Heater. This fireplace insert is not designed to burn
other fuels.
CAUTION: DO NOT USE CHEMICALS OR
FLAMMABLE FLUIDS TO START THE FIRE. DO
NOT
USE
CHARCOAL,
PELLETS,
COAL,
ARTIFICIAL LOGS OR ANY OTHER MATERIALS
AS FUEL; THEY ARE NOT SAFE. DO NOT BURN
GARBAGE OR FLAMMABLE FLUIDS.
THE USE OF UNAUTHORIZED FUEL SUCH AS
COAL COULD PRODUCE HIGH LEVELS OF
CARBON DIOXIDE IN THE LIVING SPACE. AT
HIGH LEVELS CARBON DIOXIDE COULD RESULT
IN PERSONAL INJURY OR DEATH.
The quality of your firewood directly affects heat
output, duration of burn and performance of your
fireplace insert. Softwoods generally burn hotter and
faster, while hardwoods burn longer and produce
better coals. Density and moisture content are two
critical factors to consider when purchasing wood.
The following is a list of some wood species and
their relative BTU (British Thermal Unit) content. The
higher the BTU content, the longer the burn.
Firewood with higher BTUs is generally ideal for a
wood fireplace insert.
Wood Heat Value: Sorted By Btu Content
Common Name
Lb/ cord
MBTU/ cord
High
Osage Orange (Hedge)
4,728
32.9
Hickory, Shagbark
4,327
27.7
Hop Hornbeam (Ironwood)
4,267
27.3
Beech, Blue (Ironwood)
3,890
26.8
Birch, Black
3,890
26.8
Locust, Black
3,890
26.8
Hickory, Bitternut
3,832
26.7
Locust, Honey
3,832
26.7
Apple
4,100
26.5
Mulberry
3,712
25.8
Oak, White
4,012
25.7
Medium High
Beech, European
3,757
24
Maple, Sugar
3,757
24
Oak, Red
3,757
24
Ash, White
3,689
23.6
Birch, Yellow
3,689
23.6
