Flue Damper; Outside Air (Optional); Glass Doors; Fuel - Heat & Glo HST48D Owner's Manual

1. Flue Damper

Refer to Figure 3.2 for location and operation of con-
trol.
Before lighting the fireplace, verify fully open position
by looking up from the inside of the fireplace.

2. Outside Air (Optional)

Refer to Figure 3.2 for location and operation of control.
The outside air kit supplies some combustion air for
your fireplace. It may help reduce the effects of nega-
tive air pressure.
Close the inlet to prevent cold drafts when the fireplace
is not being used
CAUTION!
Outside air control handle may be warm.
Adjust before lighting fire.

3. Glass Doors

• Glass doors are optional.
• Refer to Figure 3.3 for how to properly use them.
• With certain fireplace installations, it may be
necessary to operate the fireplace with both glass
doors in the opened or closed position to prevent
smoke spillage into the home.
BOTH SIDES OPEN
CORRECT
BOTH SIDES CLOSED
CORRECT
Figure 3.3 Operating Positions of Bi-fold Doors
10
ONE SIDE OPENED &
ONE SIDE CLOSED
CORRECT
PARTLY CLOSED/OPENED
INCORRECT
Heat & Glo • HST48D Owners Manual • 4012-055 • Rev H • 05/2020
C. Fuel
WARNING! For use with solid wood fuel only.
Other fuels may overfire and generate poisonous gases (i.e.
carbon monoxide).

1. Hardwood vs. Softwood

Your fireplace's performance depends on the quality of
the firewood you use. One species of wood varies very
little to the other in terms of energy content. All sea-
soned wood contains about 8,000 BTU's per pound.
Hardwoods have a greater density than softwoods; a
piece of hardwood will contain about 60% more BTU's
than an equal size piece of softwood. A cord of sea-
soned oak (hardwood) would contain about 60% more
potential energy than a cord of seasoned pine (soft-
wood).
Most softwoods are coniferous. These are trees with
needle-like leaves that stay green all year and carry
their seeds exposed in a cone. Examples of conifer-
ous trees are Douglas fir, pine, spruce and cedar. Soft-
woods, being more porous, require less time to dry,
burn faster and are easier to ignite than hardwoods.
Hardwoods are deciduous trees, broadleaf trees that
lose their leaves in the fall. Their seeds are usually
found within a protective pod or enclosure. Some ex-
amples of deciduous trees are oak, maple, apple, and
birch. However, it should be noted that there are some
deciduous trees that are definitely not considered hard-
woods such as poplar, aspen and alder. Hardwoods
require more time to season, burn slower and are usu-
ally harder to ignite than softwoods. Obviously, you will
use the type of wood that is most readily available in
your area. However, if at all possible the best arrange-
ment is to have a mix of softwood and hardwood. This
way you can use the softwood for starting the fire, giv-
ing off quick heat to bring the fireplace up to operating
temperature. Add the hardwood for slow, even heat and
longer burn time.
Soft woods
• Douglas Fir
• Pine
• Spruce
• Cedar
• Poplar
• Aspen
• Alder
Hard woods
• Oak
• Maple
• Apple
• Birch