Lennox Hearth Elite LBR-3824-H - Manual (Page 4)

4
HARDWOODS DENSITY
Alser, Red .41
Ash .49-.60
Aspen .38-.39
Basswood, American .37
Beech, American .64
Birch .55-.65
Butternut .38
Cherry, Black .50
Chestnut, American .43
Cottonwood .34-.40
Elm .60.63
Hackberry .53
Hickory, Pecan .60.66
Hickory, True .69-.75
Honey locust .66 (est.)
Locust, Black .69
Magnolia .48-.50
Maple .48-.63
Oak, Red .59-.67
Oak, White .64-.88
Poplar .42
Sassafras .42
Sweet gum .52
Sycamore, American .49
Tanoak .64 (est.)
Tupelo .50
Walnut, Black .55
Willow, Black .39
SOFTWOODS DENSITY
Bald cypress .46
Cedar .31-.47
Douglas Fir .46-.50
Fir .32-.43
Hemlock .40-.45
Larch, Western .52
Pine .39-.59
Redwood .35-.40
Spruce .35-.41
Tamarack .53
However, most wood is sold by volume, not by
weight. To determine the best heating source,
look at the density of various wood types.
(Density is the weight for a given size.) The
higher the density, the more potential heat
output. A standard cord has a volume of 128
cubic feet. This figure also includes the air
space between and around the wood. The ac-
tual volume in a standard cord is between 60
and 100 cubic feet; depending on how tightly
the wood is packed.
Assuming that you are comparing two standard
cords of different species but the same volume
and moisture content, the denser species will
provide more BTU’s. The table of wood species/
densities reveals more helpful guidelines.
Figure 3
WARNING: IF YOUR FIREPLACE IS
EQUIPPED WITH GLASS DOORS, IT
SHOULD BE OPERATED WITH THE DOORS
FULLY OPEN OR FULLY CLOSED. IF THE
DOORS ARE LEFT PARTIALLY OPEN, GAS
AND FLAMES MAY BE DRAWN OUT OF
THE OPENING, CREATING RISKS OF BOTH
FIRE AND SMOKE. REFER TO FIGURE 3
FOR PROPER OPERATING CONDITIONS.
GLASS DOOR OPERATING SAFETY
PRECAUTIONS AND INSTRUCTIONS
These fireplaces may be equipped with glass
doors. Refer to the end of this document for a
listing of the glass doors approved for use with
these fireplaces.
(Dotted line = Fully Closed)
BI-FOLD Glass Doors
Fully Open
CAUTION
If a smoking condition exists,
glass doors should be closed
during fireplace operation.
STARTING A FIRE
1. To properly start a fire in a the fireplace, first
check the operation of the flue damper (see
“DAMPER CONTROL” and Figure 2, below).
2. To prevent smoke at startup, close all
windows near the fireplace when first lighting
a fire. The closed windows may be reopened
once a chimney draft is drawn in the fireplace.
3. Center the grate in the firebox on or over the
bottom hearth so the fire can breathe properly.
Crumble and twist plenty of newspapers UNDER
the grate, and criss-cross some small, dry
kindling sticks on top of the paper or on the
bottom of the grate.
4. Build a pyramid of three split logs (split
wood will light more quickly). Arrange the logs
to provide plenty of air space between them.
5. Light the paper at both sides of the firebox.
6. Close the screens to prevent the escape of
sparks and embers.
7. Close the damper only when the fire is
completely OUT and ashes are COLD. Keep
the damper closed when the fireplace is not in
use, to prevent unnecessary loss of conditioned
room air.
DAMPER CONTROL
This fireplace is fitted with a manually con-
trolled chimney damper.
• To CLOSE the damper, PUSH the damper rod
UP and BACK (toward the rear of the fire-
place), until locked in position.
• To OPEN the damper, PULL the damper rod
FORWARD (toward the front of the fireplace)
and DOWN, until locked in position.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 2
To CLOSE damper, PUSH damper rod UP
and BACK (toward rear of fireplace).
To OPEN damper, PULL damper rod DOWN
and FORWARD (toward front of fireplace).
Combustion Air Actuator
Lintel
Damper
CLOSED
Damper
OPEN
~
Damper Rod