Hearthstone Quality Home Heating Products, Inc
® Green Mountain Insert 70 (Model 8450)
25
Medium
Juniper, Rocky Mtn
3,150
21.8
Elm, Red
3,112
21.6
Coffee tree, Kentucky
3.112
21.6
Hackberry
3,247
20.8
Tamarack
3,247
20.8
Birch, Gray
3,179
20.3
Birch, White (Paper)
3,179
20.3
Walnut, Black
3,192
20.2
Cherry
3,120
20
Ash, Green
2,880
19.9
Cherry, Black
2,880
19.9
Elm, American
3,052
19.5
Elm, White
3,052
19.5
Sycamore
2,808
19.5
Ash, Black
2,992
19.1
Maple, Red
2,924
18.7
Fir, Douglas
2,900
18.1
Medium Low
Boxelder
2,797
17.9
Alder, Red
2,710
17.2
Pine, Jack
2,669
17.1
Pine, Norway (Red Pine)
2,669
17.1
Pine, Pitch
2,669
17.1
Catalpa
2,360
16.4
Hemlock
2,482
15.9
Spruce, Black
2,482
15.9
Pine, Ponderosa
2,380
15.2
Low
Aspen, American
2,290
14.7
Butternut (Walnut, White)
2,100
14.5
Spruce
2,100
14.5
Willow
2,100
14.5
Fir, Balsam
2,236
14.3
Pine, White (Eastern,
Western)
2,236
14.3
Fir, Concolor (White)
2,104
14.1
Basswood (Linden)
2,108
13.8
Buckeye, Ohio
1,984
13.8
Cottonwood
2,108
13.5
Cedar, White
1,913
12.2
Moisture content also plays a key role in the
performance of your fireplace insert. Wood freshly
cut from a living tree (green wood) contains a great
deal of moisture. As you might expect, green wood
burns poorly. You must season green wood before
using it in your wood fireplace insert. To season
green wood properly, split, stack, and allow it to air
dry for a period of one year. Green wood may
provide less than 2000 Btu per pound, whereas dry
wood can provide up to 7000 Btu per pound.
Stack the firewood on skids or blocks to keep it off
the ground, cover only the top of the stack. Plastic or
tarps that cover the sides of the woodpile trap
moisture and prevent the wood from drying. As for
stacking, an old Vermonter said, "The spaces
between the logs should be large enough for a
mouse to get through, but not for the cat that's
chasing it."
CAUTION: DO NOT STORE FIREWOOD WITHIN
THE
FIREPLACE
INSERT'S
SPECIFIED
CLEARANCES TO COMBUSTIBLE MATERIALS.
B
UILDING
A
F
IRE
Once you understand the controls of your wood
fireplace insert and have the appropriate firewood,
you are ready to start a fire.
WARNING: NEVER USE GASOLINE, GASOLINE-
TYPE LANTERN FUEL, KEROSENE, CHARCOAL
LIGHTER FLUID, OR SIMILAR LIQUIDS TO START
OR 'FRESHEN UP' A FIRE IN THIS HEATER.
KEEP ALL SUCH LIQUIDS WELL AWAY FROM
THE HEATER WHILE IT IS IN USE.
B
REAKING
I
N
Y
OUR
W
OOD
F
IREPLACE INSERT
It is imperative that your fireplace insert is "broken
in" gradually. Soapstone must be "seasoned"; over-
firing a new fireplace insert may cause soapstone to
crack or may damage other fireplace insert parts.
Natural moisture in the freshly quarried soapstone
must be driven out slowly to minimize the “shock” to
the stone of its first exposure to high firebox
temperatures. In addition, the asbestos-free furnace
cement must be cured slowly to ensure adequate
sealing and bonding.
When you light your first fires, the wood insert will
emit some smoke and fumes. This is normal “off-
gassing” of the paints and oils used when
manufacturing the wood insert. If you find it
necessary, open a few windows to vent your room.
The smoke and fumes will usually subside after 10
to 20 minutes of operation. The odor and smoke will
end once the fireplace insert
is “cured”.
The first few fires of the season may produce other
odors from impurities that exist in the area
immediately surrounding the fireplace insert. Some
potential impurities are cleaning solvents, paint
solvents, cigarette smoke, and soot from scented
candles, pet hair, dust, adhesives, a new carpet, and
